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CTL中有这么一句话：# m$ t/ i5 l0 E
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
) U" H2 t# q) ]" T/ g; mand “ J”, premium grade, are recommended.7 s' h; }) g6 g( J8 z
Switching power supplies present an electrically noisy environment for test instrumentation. When; k$ A, G3 w7 n
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
* N5 O% |4 e- N# _vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are+ C' `& y3 W3 ]: `# G
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.6 j3 f5 C3 ~4 _; b/ T
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are( E) P# I+ W3 I8 i% m
affected less by the high frequency magnetic fields present and give more accurate results.9 X* W" ~' m0 N: _
r6 m' v& U9 O" n: V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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