|
|
8.3.17 The junction of the thermocouple is to be firmly secured with the point on the surface on which the2 [$ L8 c' ]1 F" N: n h
temperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.21, y: N( L( Z+ A. [0 l. c1 _6 l
mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron
. q9 V# }* A( {4 e9 Sand constantan (Type J) wires, are to be used whenever a referee temperature measurement by
: v- f* `) B0 y7 gthermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan
2 z# j3 u+ l( C4 }6 J( g% j. l(Type T) wires may be used if it is determined that high frequency operation results in eddy current# Q1 l- C. i$ Z0 {# u# A( i5 u& R
heating of iron and constantan thermocouples.
4 _" H5 u' V2 I, n+ m8 f- G
7 Z; T' D9 |( x7 G8 e+ f% b6 u% ~+ h: V$ |- d5 l5 @7 [, Y" e
! U, }$ G" E0 i* nUL8750有具体要求。 |
|