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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
; h2 [. s- ^% }1 A4 F: D( |temperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.21
7 `+ l8 ] J( j2 ?mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron8 j% B! R1 p+ q
and constantan (Type J) wires, are to be used whenever a referee temperature measurement by7 P: `8 s, m" i7 T+ S4 w6 y
thermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan
! w m* [: t( c& O) A' {(Type T) wires may be used if it is determined that high frequency operation results in eddy current
( K( J2 F7 T* |. Rheating of iron and constantan thermocouples." R: o. Q* P- c+ P. O
9 U/ U+ M7 Q- U, H/ b2 o) U! N& s1 d
5 k* p) L, u! |$ _2 T
UL8750有具体要求。 |
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