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CTL中有这么一句话：, k( F- C+ c7 [) e' }1 `
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”4 `) t0 Q9 @: V# \) f( s% ^! I
and “ J”, premium grade, are recommended./ |- K. U7 h6 [8 `3 V
Switching power supplies present an electrically noisy environment for test instrumentation. When
0 V! X% w* X y+ _measuring temperatures on and within switching power supplies, thermocouples are in the immediate
* K) g+ l! J( J* Vvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are% R, q8 j7 r2 J: e# v y
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.& e! g- c2 c% s( o# P
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are! ^' x- F) Y. ]6 J# `/ S0 b
affected less by the high frequency magnetic fields present and give more accurate results.
; u: R+ x+ j3 ]1 g T2 d
, F6 w6 j+ K+ p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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