漏電起痕試驗儀由北京北廣精儀儀器設備有限公司按照國標（GB4207、IEC60112）精密生產。

本產品名稱：漏電起痕試驗儀，耐漏電起痕試驗儀，相比漏電起痕指數 （或稱相對漏電起痕指數）

型號：BDH   適用標準有：GB/T4207、GB4706.1 ASTM D 3638-92、IEC60112 、UL746A 

需要請致電詳談：北京北廣精儀儀器設備有限公司

一、本儀器技術參數：

1、空氣環境：0~40°C；

2、相對濕度：≤80%；

3、無明顯振動及腐蝕性氣體的場所；

4、工作電壓：AC220V±2% 50HZ±1%，1KVA；

5、試驗電壓：100~600V連續可調數顯，電壓表顯示值zui大誤差：1.5%，顯示值為:r.m.s；

6、延時電路：試驗回路在（0.5±10%）A（r.m.s）或更大電流時延時（2±10%）S后動作；

7、電極：

a: 5㎜×2㎜矩形鉑金電極和黃銅電極各一對；

b: 電極符合IEC60112的尺寸要求：（5±0.1）㎜×（2±0.1）㎜×（≥12）㎜,其中一端鑿尖角度為（30±2）°（即試驗端呈30°±2°斜角）,鑿尖平面寬度為0.01㎜~0.1㎜；

c: 電極間所成角度為60°±5°,間距為（4±0.1㎜）；

d: 對樣品壓力為:1.00N±0.05N；

8、滴液系統：

a: （30±5）秒（開啟滴液時間28S+開啟滴液持續時間2S）自動計數、數顯（可預置），50滴時間：（24.5±2）min;

b: 滴液針嘴到樣品表面高度:35㎜±5㎜（附一個量規作測量參考）;

c: 滴液重量:20滴:0.380g~0.489g;50滴:0.997g~1.147g;

9、短路電流：兩電極短路時的電流可調至（1±0.1）A,數顯±1%,電流表顯示值為有效值（r.m.s）;

10、儀器外形尺寸（寬*高*深）：1100*1150*550㎜（0.5立方）；

1：700*385*1000㎜（0.1立方）；

箱體由1.2厚的304不銹鋼板制成，可訂制0.75立方；

11、樣品支撐平板：厚度≥4㎜的玻璃；

12、針嘴外徑：A溶液：0.9㎜~1.2㎜

B溶液: 0.9㎜~3.45㎜

滴液大小根據滴液系統而定；

13、風速：0.2M/S。

二、本儀器主要用途：

漏電起痕試驗儀適用于照明設備、低壓電器、家用電器、機床電器、電機、電動工具、電子儀器、電工儀表、信息技術設備的研究、生產和質檢部門，也適用于絕緣材料、工程塑料、電氣連接件、輔件行業。

三、漏電起痕試驗儀：

1.工作電源:AC220V±5[%] 50HZ±1[%],1KVA；

2.試驗電壓: 100~600V連續可調數顯；

3.延時電路:試驗回路在0.5A或更大電流時延時2秒后動作；

4.電極:5mmX2mm矩形鉑金電極和黃銅材料各一對,每個電極對試樣的壓力可調整（1N±0.05N）；

5.兩電極間距4±0.1mm;

6.滴液間隔:30±5秒（開啟滴液時間28S+開啟滴液持續時間2S） 自動計數 、數顯（可預置）；

7.短路電流:兩電極短路時的電流可調至1±0.1A,數顯±1[%]；

8.操作箱體積:0.1立方、0.5立方、0.75立方。

四、本儀器特點：

CTI是判斷絕緣材料相比電痕化指數，滿足DIN EN60112標準。 CTI模擬跟蹤絕緣材料間通過兩電極間滴液的電流。通常使用的絕緣材料可能暴露在潮濕或者有塵埃的環境中，如果在傳導的情況下，可能引起重壓或者火災的危險。本部分滿足DIN EN 60 112 / IEC 60 112 / 或者 VDE 0303 *部分。 測試滿足KA方法 （滴落物的數量 / 爬行者通道深度）和KA方法（直到第50滴滴液的電壓）。 CTI 和 PTI值將能夠確定。 組合允許進行微調測試電壓、測試電流、開關時間、滴液大小和滴落數量。

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume

compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 dro

ps: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate t

attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution

B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test v

oltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.

Proof Tracking Index Proof Tracking Index （PTI）: In 30 seconds the material surface to withstand a drop rate of 50 drops of the role of the electrolyte to form a permanent conductive carbon path required voltage to V represents.

Polymeric electrically insulating material has a special destruction phenomenon that polymeric insulating material surface may occur under certain conditions-tracking degradation phenomenon, and can lead to damage to tracking. Tracking damage is present on the surface when the material is wet and dirty, the electric field is large enough, the surface leakage current will be generated, when the current under the action of Joule heat, water is evaporated, the separation film surface with a gap formed （called the drying belt）, the drying belt to instantaneous field strength between the film reaches the discharge field strength which causes discharge, the discharge surface of the heat generated by partial carbonization material, high conductivity of the carbonization product, where the electric field density is concentrated to the carbonization section, causing the repeated discharge, around which produce more carbides, carbonized conductive path is formed, extending in a direction to the electrodes, resulting in a short circuit.

Sample thickness

GB/T4207-2003 requirements, the specimen thickness of not less than 3 mm, as is usually the case that the sample pad under glass or steel, because the test ionization NH4Cl solution will produce a lot of heat, heat the sample must withstand case, if the sample on the sample is too thin will quickly transfer heat away, would not achieve the specimens withstand the effects of ionizing NH4Cl solution. Therefore, the test specimen should be to ensure thickness of not less than 3 mm, the sample should be used the same material superimposed manner, the sample thickness of not less than 3 mm. Meanwhile superimposed sample size should be as consistent.

Distilled or deionized water resistivity

GB/T4207-2003 specified in distilled or deionized water with a prepared solution of NH4Cl, the resistivity of the solution （395 ± 5） Au · cm. However, the standard does not specify distilled or deionized water resistivity. I obtained in the long term test, distilled or deionized water may affect the resistivity of experimental results, the results of the test voltage is reduced. Because distilled or deionized water resistivity is low, it means distilled or deionized water containing negligible like ions, these impurity ions affect dubbed NH4Cl solution NH4 + and Cl-, and even accelerated NH4Cl solution ionized. Distilled or deionized water, the higher the resistivity, distilled or deionized water contains less impurity ions, the impact on the test results is smaller. From the author of a large number of experimental results, distilled or deionized water resistivity of not less than 10 M Europe · cm, thereby controlling distilled or deionized water impurity ions on the test results.

Short-circuit current test set

GB/T4207-2003 provides short-circuit current test before the test should be set to 1 A. Well here there are two possibilities:

（A） different test voltage is only set once short-circuit current;

（2） be set individually for each test voltage short circuit current. For different test voltage is only set once short-circuit current, for example, the test voltage is 200 V, short-circuit current to 1 A, then the test voltage is increased to 300 V, and then verify that the short circuit current, can be found in the current exceeds 1 A. If the test voltage is reduced to 150 V, the validation circuit current, you will find current of less than 1 A. So as to ensure compliance testing standards, adjusted once each test voltage, short-circuit current should be adjusted again.

Droplet size control amount

GB/T4207-2003 predetermined amount of liquid droplets in the size should be controlled at 44 drops / ml to 45 drops / ml. In the experiment, the number of drops can be controlled by a droplet counter, then how to determine the 44 drops to 45 drops is 1 mL it? The author summarizes a simple and effective method. NH4Cl solution, the percentage concentration of 0.1%, NH4Cl amount is small, then the density of the solution can be set to 1 g / mL. The solution was poured into a dropping vessel, a small container with a first weight of the empty container weighed, and the small container in the drip device, to accommodate the droplets. Start the instrument, drop out of NH4Cl solution 44 drops to 45 drops, and then weighed small container weight. Subtract two weights can be drawn after 44 drops to 45 drops of liquid droplets weight. If the weight is 1 g, it shows 44 drops to 45 drops of the solution was 1 ml; if more than 1 g, it shows excessive droplets, droplet volume should be adjusted to delay; if less than 1 g, it shows the amount of droplets too small, the amount of liquid droplets can be adjusted delay. This ensures that the droplet size of the volume compliance.

Clean the electrodes

GB/T4207-2003 states: test response electrode for cleaning. This means that after each do a test, the electrodes should be cleaned, whether it is at the same voltage or different voltages. Cleaning can use detergents, alcohol, etc. can also be used for cleaning, but may not use abrasive cleaners. After cleaning, apply NH4Cl solution was prepared using deionized or distilled water if the test sample combustion occurs, making the platinum electrode melting, then the electrodes should be trimmed. Dressing available when more than 1200 mesh sandpaper lightly polished on the part of the ablation to remove traces of ablation. Polished should be very careful not to change the outline of the electrodes, the electrode should be kept constant angle R of the blade, does not change the cylindrical surface of the electrode edge, the state should remain sharp, but not sharpened.

Tracking tester by Beijing North Canton Precision Instrument Equipment Co., Ltd. in accordance with the national standard （GB4207, IEC60112） precision production, instrument quality, impeccable. After the sale and a professional engineer onsite training debugging. Until the client to understand the instrument so far.

The product name: Tracking tester, resistance to tracking tester, comparative tracking index （or called comparative tracking index）. Model: BDH Applicable standards: GB/T4207, GB4706.1 ASTM D 3638-92, IEC60112, UL746A

Need to go into the details, please call: Beijing North Canton Precision Instrument Co., Ltd.

First, the technical parameters of the instrument:

1, the air environment: 0 ~ 40 ° C;

2, relative humidity: ≤ 80%;

3, no vibration and corrosive gases;

4, Working voltage: AC220V ± 2% 50HZ ± 1%, 1KVA;

5, the test voltage: 100 ~ 600V continuously adjustable digital display, voltage table shows the maximum error: 1.5%, the displayed value: rms;

6, the delay circuit: test circuit in （0.5 ± 10%） A （rms） or greater current delay （2 ± 10%） S after the action;

7, the electrode:

a: 5 mm × 2 mm rectangular platinum electrodes and brass electrodes of one pair;

b: IEC60112 electrodes meet the dimensional requirements: （5 ± 0.1） mm × （2 ± 0.1） mm × （≥ 12） mm, one end of the chisel tip angle of （30 ± 2） ° （ie test side was 30 ° ± 2 ° angle）, flat chisel tip width of 0.01 mm to 0.1 mm;

c: the angle formed between the electrodes of 60 ° ± 5 °, a pitch of （4 ± 0.1 mm）;

d: the sample pressure: 1.00N ± 0.05N;

8, drip systems:

a: （30 ± 5） seconds （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）, 50 drops of time: （24.5 ± 2） min;

b: drip needle tip to the sample surface height: 35 mm ± 5 mm （attach a gauge for measuring the reference）;

c: Drip Weight: 20 drops: 0.380g ~ 0.489g; 50 drops: 0.997g ~ 1.147g;

9, short-circuit current: two electrodes short-circuit current is adjustable to （1 ± 0.1） A, digital display ± 1%, RMS current meter display value （rms）;

10 Instrument Dimensions （W * H * D）: 1100 * 1150 * 550 mm （0.5 cubic meters）;

1:700 * 385 * 1000 mm （0.1 cubic meters）;

Case from 1.2 thick 304 stainless steel, can be customized 0.75 cubic meters;

11, the sample support plate: thickness ≥ 4 mm glass;

12, needle diameter: A solution: 0.9 mm to 1.2 mm

Solution B: 0.9 mm to 3.45 mm

Droplet size may be under the drip system;

13, wind speed: 0.2M / S.

Second, the main purpose of this instrument:

Tracking test apparatus for lighting equipment, low voltage electrical appliances, household appliances, electrical machines, motors, power tools, electronic equipment, electrical instruments, information technology equipment, research, production and quality control departments, but also for insulation, plastic , electrical connectors, accessories and parts industry.

Third, tracking tester:

1 Power Supply: AC220V ± 5 [%] 50HZ ± 1 [%], 1KVA;

（2） Test voltage: 100 ~ 600V continuously adjustable digital display;

3 delay circuit: Test circuit current at 0.5A or greater delay 2 seconds after the action;

4 Electrode: 5mmX2mm rectangular brass platinum electrodes and each one pair of each electrode on the sample pressure adjustable （1N ± 0.05N）;

5 two electrode spacing 4 ± 0.1mm;

6 Drip interval: 30 ± 5 sec （open drip drip time 28S + open duration 2S） automatic counting, digital display （can be preset）;

7 Short circuit current: two electrodes short-circuit current is adjustable to 1 ± 0.1A, digital display ± 1 [%];

8 Operation box volume: 0.1 cubic meters, 0.5 cubic meters, 0.75 cubic meters.

Fourth, this instrument features:

CTI is compared to determine the insulation material tracking index, meets DIN EN60112 standards. CTI tracing simulation by an insulating material between two electrodes of the current drops. Usually the insulating material may be exposed to a humid environment or the dust, if the transmission case, it may cause a fire hazard, or stress. This section meets DIN EN 60 112 / IEC 60 112 / VDE 0303 or the first part. Test methods to meet the KA （drip quantity / Crawler channel depth） and KA methods （50 drops of liquid until the voltage）. CTI and PTI values ??will be able to determine. Combination allows for fine-tuning the test voltage, test current, the switching time, the size and drip drip quantity.

Fifth, the instrument needs to pay attention to:

1, during operation, personnel should pay attention to personal protection, to avoid leakage injured or contaminated solution to the mouth, eye damage parts

2, the input power supply AC220 ± 2%.

3, the exhaust pipe should pass out of the window.

4, in the sample, do not open the doors, to be tested after completing the experimental failure or when the fire generated smoke, first turn on the fan exclude smoke, then open the doors for the job.

5, before the experiment required to confirm whether the device is in the measurement period, such experiments can not be extended

6, power supply applications with ground three pole socket, to ensure reliable grounding.

Six, Test principle:

On the surface of the solid insulating material, the required size （2mm × 5mm） between platinum electrodes, - applying a voltage and a time （30s） given height （35mm） drop required volume of conductive liquid droplet （0.1% NH 4CL） to evaluate the solid insulating material surface in wet or contaminated medium electric and combined effects of the anti-leakage performance, measured comparative tracking index （CT1） and the proof tracking index （PT1）.

Seven, test purposes:

Proof tracking test is to simulate the actual use of household products in the live parts of different polarity in the insulating material is deposited on the surface of a conductive material caused by insulation material surface creepage breakdown short circuit and fire hazard testing carried out. Electrical products in use, due to environmental causes dye hollow of a tree surface of insulating material with dirt, moisture and the leakage, thereby inducing the corrosion damage the insulation properties. Tests specified in this standard is an extremely harsh conditions simulated acceleration tests to verify whether the formation of an insulating material signs of leakage, which can distinguish solid insulating materials in a short anti-tracking ability, to ensure that products in certain environmental conditions safe use.

Other additional description:

Tracking （Tracking）: solid insulating material surface and the electrolyte in the electric field under the combined effects of the gradual process of forming a conductive path.