Product details :Model ZLT-GTR:
Glow Wire Test Apparatus,to determine the fire resistance by the fire hazard test, accordance with IEC60695-2-10, IEC60335, IEC60598 and other standards.
The ignition source is imitated by an electrically heated wire loop against which the sample is pressed with a constant force. A miniature jacket thermocouple serves as a sensor for the loop temperature.
The sample has to be fastened to a carriage on which, by means of a tensioning cord, a weight with a force of 1 N is effective in the direction of the wire loop. Scales enable the reading of the flame height and the depth of penetration. Approx 200 mm below the wire loop a board of pine wood, covered with a layer of tissue paper, is mounted. This device enables to judge the danger of a fire spreading through burning drops or glowing parts falling from the sample. The calibration is done with silver foil, when the foil melts, the measuring unit must indicate a temperature of 960℃.
1 wire loop of nickel-chromium, Φ4 mm, accordance with IEC60695-2-10 figure 1, with clamping mechanism, with Φ0,6 mm for the thermocouple
1 carriage with fixture for the specimen, with a rate of approach and withdrawal of 10 mm/s to 25mm/s
1 fine rope pull mechanism with weights for loads of 0.95±0.1N
1 gauge of 7 mm for the depth of penetration, with maximum pointer and stop,
1 scale to measure the flame height,
1 high current isolating transformer to heat the wire loop, with series connected variable ratio transformer, to set the temperature up to 960±10℃,
1 type K thermocouple Chromel-alumel, Φ1mm, length approx.500 mm, to indicate the temperature of the glow-wire loop, with digital display measuring range 0~1050℃, built-in operable,
1 chamber with a volume of at least 0,5 m3, black interior,
1 wooden board, 10 mm thick, 10 sheets of wrapping tissue, of grammage between 12g/㎡~30g/㎡.
Power supply: 220V50Hz other voltages request.