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CTL中有这么一句话：
7 f/ c( }; t4 k1 u6 e' q, W- {Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
4 D3 N4 L7 C. u& v7 d1 E# j) b) U9 qand “ J”, premium grade, are recommended.4 y4 p: ] g8 g, O' r" o# h# C& x
Switching power supplies present an electrically noisy environment for test instrumentation. When
8 ?! c, c* L! H" f0 \. {- ] Gmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
6 z2 n& N0 U' avicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are: L1 d- R9 s% r. u6 y- G
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.3 c+ d0 g" o( A @% j! b* a
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
$ |; C& `0 b# [9 D' r! q4 x# Oaffected less by the high frequency magnetic fields present and give more accurate results.
6 K U: E( |/ V5 e
: n( e7 ?8 {1 t& t3 t$ O2 t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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