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8.3.17 The junction of the thermocouple is to be firmly secured with the point on the surface on which the
+ O( F/ v; Q- [$ }1 Xtemperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.21
2 @/ j3 v3 y8 I6 ^mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron
. {0 K; x1 ]4 M7 E9 Land constantan (Type J) wires, are to be used whenever a referee temperature measurement by
% Z5 i: t7 g! x( W3 R. lthermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan$ U$ {9 V) s0 d* T0 B; L5 ^
(Type T) wires may be used if it is determined that high frequency operation results in eddy current
, d4 v; U. C1 pheating of iron and constantan thermocouples.6 x4 b3 }) B. q
. c' |- c: W, X! Y
% B% S; D# L1 }* C& d& {
: J$ @ M+ b+ ^4 ] o4 G
UL8750有具体要求。 |
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