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Address: No.6-36, Yaogu Farm, Shibi No.3 Village, Shibi Street, Panyu District, Guangzhou, Guangdong, China
Contact name:Tessa Huang
HJ AUTOMATIC CONTROL TECHNOLOGY CO., LTD |
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Flammability Test Chamber Fire Hazard Testing Glow Wire Test Apparatus
Standard:
IEC60695-2-10 Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods – Glow-wire apparatus and common test procedure,
IEC60695-2-11 Fire hazard testing – Part 2-11 : Glowing/hot-wire based test methods – Glow-wire flammability test method for end-products,
IEC60695-2-12 Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods – Glow-wire flammability index (GWFI) test method for materials,
IEC60695-2-13 Fire hazard testing – Part 2-13: Glowing/hot-wire based test methods – Glow-wire ignitability test method for materials.
Feature:
The glow wire test is a method used for characterising the ignition and the flammability of polymers. A heated wire is brought into contact with the surface of the specimen at a specific temperature and for a defined time interval. During the test it is determined whether or not the material ignites within a defined period of time. Furthermore, it is observed whether a potential flame is extinguished or the polymer drips. Flammability Testing Equipment
What is Glow Wire Testing?
Historically a number of methods have been developed to evaluate material flammability and fire resistance. These include both direct flame and indirect flame testing methods. An example of the direct flame method is defined in the UL 94 specification. This long accepted test method involves applying a flame directly to a vertically or horizontally mounted specimen under controlled conditions. On the other hand, the indirect flame method features a non-flaming heat source applied to a sample. Glow wire testing is an example of the indirect flame method. Test results from applying these methods provide a way to compare the materials’ tendency to resist ignition, self-extinguish flames (should ignition occur), and to not propagate fire via dripping. To better understand the differences between the direct method and the indirect method, refer to Figure 2.
Parameter:
| Model | GW-2(Touch screen) |
| Working voltage | 220V/50Hz |
| Control operation mode | PLC control, 7 inch color touch screen operation, with infrared remote control |
| Glow-wire | Nickel/chromium (> 77% Ni/20 ± 1% Cr) wire, having an overall diameter of 4,00 mm ± 0,07 mm (before bending) |
| Glow-wire force to the specimen | 0.95N±0.1N. Flammability Testing Equipment |
| Penetration of the tip of the glow-wire | 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 wrapping tissue (12–30g/m³) is covered on the 10mm thick wooden board, with a distance of 200±5mm below the test specimen |
| Test chamber | >0.5 cube, the test specimen can be mounted at least 100 mm from any surface, 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 |
