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CTL中有这么一句话：* i4 Z; Z3 q) T' }& K9 o
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
# e# T/ a) x# \! ^* }" Band “ J”, premium grade, are recommended.
$ k; q8 b% b' |; E* i0 bSwitching power supplies present an electrically noisy environment for test instrumentation. When
6 T* y5 L x5 X' c& Mmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
9 s" i+ L! i. D2 X0 ]5 T0 Evicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are9 x% W# M3 A- }$ f1 W
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.' e6 @! G+ U/ W% z. l! p5 h- c
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
; W6 T. Q E) U( l: K& O" Paffected less by the high frequency magnetic fields present and give more accurate results.
6 `$ q7 x' S0 L5 m& I3 ?- `/ i
3 a( k" g, \% d9 c: {8 W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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