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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
) V7 a% G0 R& W$ L9 n% |! Utemperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.21. G6 {+ c( _. m
mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron/ j, f% g$ C% r: g% m
and constantan (Type J) wires, are to be used whenever a referee temperature measurement by
: w8 g2 z* p3 o4 Tthermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan
3 f* r/ J8 D6 D(Type T) wires may be used if it is determined that high frequency operation results in eddy current" i: m8 y# J% q5 A8 } m/ L
heating of iron and constantan thermocouples.
9 }3 i! ^0 \) e5 a1 Y& F1 V# B6 c- m3 {
5 d" {4 e. t2 H9 t9 C# C
P. z% `' @; G3 `, `6 n+ nUL8750有具体要求。 |
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