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CTL中有这么一句话:
2 B3 o: e! G' w# [0 [5 |Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”( Q- D6 f+ v0 K0 e2 X) \/ d
and “ J”, premium grade, are recommended.
5 k4 |- R9 h0 U5 r9 y' oSwitching power supplies present an electrically noisy environment for test instrumentation. When* u9 u6 q, m2 `* d! P
measuring temperatures on and within switching power supplies, thermocouples are in the immediate3 @! \2 Y( E& K! B
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are9 j# x7 v0 m' ^' j! B: A
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
# r* e6 x/ I) F/ u8 q) I ]Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are. t3 K+ T m; G
affected less by the high frequency magnetic fields present and give more accurate results.
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也就是说实验室尽量要用T type热电偶? |
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