UL746A Standard Glow Wire Tester Glowing Component Thermal Stress Test
Brand Name:KINGPO
Certification:calibration certificates
Minimum Order Quantity:1
Delivery Time:20 working days
Payment Terms:T/T
Place of Origin:Mainland China
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Product Details
UL746A Standard Glow Wire Tester Glowing Component Thermal Stress Test
UL746A Glow Wire Tester Simulating The Thermal Stress Test Of Glowing Component
Products Introduction
This device is manufactured according to the standard of IEC60695-2-10, IEC60695-2-13. It also conforms to the standard requirement of UL746A. This device simulates the thermal stress test of glowing component or heat source like overload resistance or ignition source which is caused in a short time. It is suitable for electric and electronic products, household appliances and other material to do fire hazard testing. It is also used in the no flame ignition source fire test to test initiation temperature and flammability index of related glowing filament.
This equipment adopts a new design concept, while in the realization of accurate positioning, but also to achieve the rapid adjustment after replacing the sample, truly meet the requirement of easy and convenient operation; The control system adopts PLC and touch screen control, each parameter can reflect the real situation of the relevant parameters more timely and accurately, and the operation is intuitive and convenient, so as to meet the needs of scientific research.
Technical Parameters
| ParametersModel | GW-2(Touch screen) |
| Working voltage | 220V /50Hz |
| Control operation mode | PLC control, 7 inch color touch screen operation, with infrared remote control |
| Glowing filament | Ф4mm ± 0.04mm (> 77 % Ni/20 ± 1 % Cr) special standard ring shape,horizontal standing |
| Specimen pressure on glowing filament | 0.95N±0.1N |
| Maximum depth of heating | 7mm ± 0.5mm |
| Specimen movement speed | 10mm /s ～ 25mm /s |
| Temperature calibration | Calibration temperature:960°±10°C, the hot wire by electric heating |
| Thermocouple: RS imported 1mm armour nickel-chromium/nickel/ nickel aluminum K-Thermocouple, temperature resistance 1100° | |
| Silver foil: purity 99.8%, area :2m², thickness:0.06mm | |
| Tray | A layer of silk paper (12~30g/m³) is covered on the 10mm thick pine board, with a distance of 200±5mm below the test sample |
| Test chamber | >0.5 cube,sample distance from the inside of the box is greater than 100mm, black yogon background,background illuminance ≤ 20Lx,with exhaust fan |
| Testing time | 30s±1s |
| Test procedure | The test sample is driven by the car and automatic run, the car will return automatically after glow-wire entered the test sample of 7mm |
| Lighting | Equip with lighting in the test chamber, with control |
| Dimension | 1100*550*1200mm, 140kg |
Preparation Before Test
The specimen is installed on the fixture, to make the glow wire tip is pointed to the specimen’s center
Place the specified layer below the test specimen.
Press【Forward】button, when the test specimen is in contact with the glow wire, press【Stop】button immediately.
Adjust the position of the automatic timing: slowly adjust the proximity switch to move it to the fixture, when proximity switch indicator light is bright, at this time, this position is where the test specimen just touches the glow wire tip, simultaneously timing begins automatically, then lock the screw of the proximity switch.
Press【Reset】button,make the fixture away from the glow wire.
Press【Forward】button, make sure the fixture stops automatically and timing begins when the sample touches the glow wire.
Press【Reset】, to make the fixture backward.
Notice
To prevent the electrical shock, scalding, burn or fire accident.
To prevent the inhalation of the toxic gas or smoke.
To prevent the damage of the toxic residual to the human health.
Over-temperature and low-temperature protection function. In case of higher than the maximum limit temperature, the heating is stopped; in case of lower than the lower limited temperature, the heating is started; in case of the heating time more than 5 minutes, the heating is stopped automatically.
During the test, the fan should be shut off so as not to affect the test result; after completing the test, turn on the fan
Glow Wire Tester Definition
The glow wire tester is designed and manufactured according to the requirements of the “glow wire test method” in IEC60695-2-10, GB/T5169.10, and ASTM D6194 standards to simulate the thermal stress caused by the heat source or ignition source such as a heating element or overload resistance in a short period of time.
The glow wire test for plastics is to determine the resistance to fire insulating parts. And the glow wire test simulates the situation of what the plastics material will happen when contact with an over-heated part.
Test Specification
The glow wire tester is suitable for the ignition test of electrical and electronic products such as lighting equipment, electric appliances, household appliances, machine tools, electric motors, electric tools, electronic instruments, information technology equipment, electrical connectors, etc., as well as suitable for insulation materials, engineering plastics or other solid combustible material industries.
Working Principle of Glow Wire Tester
After heating the nickel chromium wire (U-shaped glow wire head) with a high current to the specified test temperature, blanch the sample at a specified pressure for 30s. The ignition risk of electrical and electronic equipment is determined according to whether the test material and bedding burn or not and whether it burned. Record the burning time, ignition time, flame extinguishing time and flammability index after the completion of the test.
Glow Wire Test Procedure
The glow wire temperature should be set up first. Heating the glow wire to reach the required temperature.
Move the glow wire to contact with the specimen.
Record the result accord to the glow wire test standard.
Please feel free to contact us if you want to know the glow wire test apparatus price.
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UL746A Standard Glow Wire Tester Glowing Component Thermal Stress Test
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