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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 the6 O! ~5 Y5 E6 ~
temperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.218 @; u8 t. [5 d4 V( _ ~ l& c
mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron
% |5 M9 z6 q L1 ~+ Q/ G8 ^+ }0 cand constantan (Type J) wires, are to be used whenever a referee temperature measurement by
1 g; ~1 V) w8 o# wthermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan
) E4 S% X6 y _0 [(Type T) wires may be used if it is determined that high frequency operation results in eddy current! H* |, D1 R7 E. d# i ?: g
heating of iron and constantan thermocouples.2 u3 t9 j: W* B- k. G2 y, @
( A* c9 h0 z9 x E, B# C9 W& b
- A; z. q/ Y' z% \7 ?
! i, T1 t1 K/ g N, ZUL8750有具体要求。 |
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