The glow wire tester is a kind of test equipment to test for materials burning, glow-wire test apparatus according to the requirements of the "test methods" in the glow wire tester test standard design and manufacture. The glow wire tester device is suitable for the test of electric and electronic products, household appliances and materials conduct fire hazard testing for flame ignition source fire tests to determine the related materials from the glow wire ignition temperature and flammability, flame index. Flame spread within the device is easy to insulating materials or other solid combustible material part may be due to the glow wire or burning element into the sky burning. Under certain conditions, for example, flows through the fault current of the wire, element overload and bad contact case, some components it from the part of the vicinity of fuel reaches a certain temperature. As an common industrial electrical tester, glow wire tester has been widely used in a variety of electronic machinery industry.
Principle of Glow Wire Tester
glow wire tester uses large current regulations of material (Ni80/Cr20) and the shape of the electric wire (Φ4 mm nickel chromium wire) to heat to the test temperature (550 ℃ ~ 1000 ℃ for one min, it uses the prescribed pressure (1.0N) vertical blanch hot the sample 30s, depending on the sample and bedding material whether ignition or held the ignition time determination of electric and electronic equipment finished fire danger; ignitability determination of solid insulating materials and other solid combustible materials, ignition temperature (GWIT) ignitability and flammability index (GWFI). measuring the temperature of the glow-wire with a nominal median diameter of 0.5mm sheathed filaments thermocouple wire (K type) of nickel-chromium and nickel - aluminum wire, is suitable for temperatures up to 960°C. under the conditions of continuous operation, the welding point is located in the armored jacket, a thermocouple for measuring the temperature of the glow wire, armored metal sleeve can resist the temperature capability at least 1050°C. Calibration: the calibration of the temperature measurement system temperature is 960 °C. The standard approach is with a purity of 99.8%, a thickness of 0.06mm, the side length of 2mm square silver foil on the upper surface of the top of the glow wire. When searing hot filament make the silver melt, the temperature is 960 ° C ± 15 ° C, Test glow filament temperature thermocouple, armored metal sleeve at least be able to withstand the temperature of 1050 degrees.
Glow Wire Tester Features
Glow wire tester achieves the automation control system, after starting, the clamping specimen car will automatically transport the sample to the glow wire, and when it reaches the burning time, the set will automatically return. The inside is a black background with ventilation and lighting device, digital display of time and temperature, observation is convenient, reliable use. The power supply is AC 220V / 50Hz.
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