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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 the0 \. n7 c3 ~% V$ S5 h
temperature is to be measured. The thermocouple is to consist of wires not larger than 24 AWG (0.21$ B+ b9 _; w8 U: B; }
mm2) and not smaller than 30 AWG (0.05 mm2). Thermocouples consisting of 30 AWG (0.05 mm2) iron
% h) U# r! C7 ^" Nand constantan (Type J) wires, are to be used whenever a referee temperature measurement by# }* V+ Y! v1 ?& l' C8 h
thermocouples is necessary. Thermocouples consisting of chromel-alumel (Type K) or copper-constantan0 f% q7 F: \ `1 p) l1 q
(Type T) wires may be used if it is determined that high frequency operation results in eddy current$ f/ i; h3 R' m8 p, j$ g" R
heating of iron and constantan thermocouples." D/ f) W, N( D f O. {- @- }
) B6 H/ V4 [( K( u2 U
* Z' a: x8 O( i. t" S1 ?! d
. y' r, U0 f$ z; ]& o/ LUL8750有具体要求。 |
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