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CTL中有这么一句话：- s" y9 \+ @# f" d8 I5 i1 |! r7 R Y- E
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”/ _) A/ F" R- V5 [/ t$ ?' I7 _' L; w
and “ J”, premium grade, are recommended.
" O2 N4 _* V8 G3 \Switching power supplies present an electrically noisy environment for test instrumentation. When& T5 h8 K# U' Q) ]) n
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
! ?, O2 o! J" }+ K' }% evicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are8 a# V. M7 v, i+ I( W
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
. }! J$ L3 n6 k) I( b0 eType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
& N# u! F: f; s* C1 l* Aaffected less by the high frequency magnetic fields present and give more accurate results.
7 @. c) Q6 Z0 b3 Z& R
% u' J% w! |, @- k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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