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CTL中有这么一句话：
4 P4 b& n1 w \Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”6 F0 @0 C3 |1 j7 u. Z4 I0 w
and “ J”, premium grade, are recommended.
) {& E7 B) b6 G* t/ ]) o: H+ K1 VSwitching power supplies present an electrically noisy environment for test instrumentation. When6 m, e. Y1 W2 k
measuring temperatures on and within switching power supplies, thermocouples are in the immediate' l# Q7 s+ |+ A2 A
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
$ ~! C! ^8 q- B4 v lmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.$ @6 V7 d% \1 C( Y* z5 k
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
+ v; h# D* G- |6 `2 t( S0 u( Saffected less by the high frequency magnetic fields present and give more accurate results.5 y& a1 P# J9 ]; m
1 {+ g7 J5 X( u, C1 o0 z% [
也就是说实验室尽量要用T type热电偶? |
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发表于 2013-8-29 09:03
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