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这个加热丝的材料没有改哦+ p7 B) S* c K
, H/ U) m# h. R" H7 b6.2 Ignition source
# ~% F- x. x+ z0 z NiCr (80/20) heater wire, having a normal composition of 80 % nickel and 20 %
& b5 f. T, r1 ?7 J/ s% t0 P. W0 |$ j5 ochromium, having a diameter of 0,5 mm+ 0,020mm and a minimum length of 250 mm.This heater wire is coiled around the centre portion of the test specimen by applying five turns.- _# y. P, V- g+ U
/ ~$ T6 U% S- G3 {NOTE NiCr (80/20) heater wire has a nominal cold resistance of approximately 5,25 Ω/m. |
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