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CTL中有这么一句话:
8 w; |$ J) w# b Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”' c5 D6 F4 c6 R# U! ~
and “ J”, premium grade, are recommended.- V9 S' I" d0 L! ?
Switching power supplies present an electrically noisy environment for test instrumentation. When) }2 T, ?, d+ D! f$ Z
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
) S0 }, b" X" E: q/ s% J. c* D vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
0 H/ C3 o6 q" s7 T+ ?& x made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
" a/ D6 p/ ]* H7 Y+ r% F Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
& C5 q# ~0 y' V: P1 P affected less by the high frequency magnetic fields present and give more accurate results.4 n0 z& u/ A% B( P+ n5 ]9 ^
9 e* T8 o2 b2 H1 Z, D" q# {- v 也就是说实验室尽量要用T type热电偶?" d* m' f9 \( e, e. {6 y/ ]0 m
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