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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
8 H7 O: T2 l! Stemperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.211 j' V2 h2 G0 N: t
mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron+ d( P* z: M9 g2 w
and constantan (Type J) wires, are to be used whenever a referee temperature measurement by
7 d3 c; B0 J( ?& q9 c7 q" cthermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan" _: t0 J. c# K- r4 ~5 p
(Type T) wires may be used if it is determined that high frequency operation results in eddy current
/ r: H# |0 J/ f$ R. eheating of iron and constantan thermocouples.
' z, M' ~( u9 C( ~' W3 c! d) [- ~1 u- W# G
" c0 K" v8 V5 T
( O7 X7 q; [5 y% }- _/ WUL8750有具体要求。 |
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