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CTL中有这么一句话：% e E5 s& O- `6 n, \( W
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”2 B1 P0 k& _- ~2 {! P
and “ J”, premium grade, are recommended.! Z6 g7 j. @2 `
Switching power supplies present an electrically noisy environment for test instrumentation. When# d% h. ]2 A- p( t7 \' c- x3 C- ]1 m
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
$ ]+ ?8 n5 l* C3 U* C! tvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
- d2 ?7 j. U% d4 Omade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
( L0 s4 h$ l) FType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
2 X* }5 w2 y! X( t4 _, f+ ?8 ]3 eaffected less by the high frequency magnetic fields present and give more accurate results., |) _' ^! b2 X# C
" o3 ?' P9 A( I, c1 f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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