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CTL中有这么一句话：
. r% d$ A b; v' hThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”# ?6 D. @8 h0 ^! \1 x
and “ J”, premium grade, are recommended.
' ^+ K2 {! ~& y' W9 eSwitching power supplies present an electrically noisy environment for test instrumentation. When3 `0 o2 p; \7 m* s' t2 ?
measuring temperatures on and within switching power supplies, thermocouples are in the immediate0 W/ r5 t" l/ x0 k4 q0 C# D
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are$ o* v" O$ V4 E; N/ X# h$ e
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic." _: N6 ~$ b* i! A( Z
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
+ ~5 k* p3 l6 d1 Baffected less by the high frequency magnetic fields present and give more accurate results." v! `3 L8 M1 c2 ~. _9 \
+ J% x2 H% Z I, o2 p
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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