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CTL中有这么一句话:
$ ?0 M4 d( D0 K$ N3 sThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
9 P) Y/ g T2 band “ J”, premium grade, are recommended.& [- l) b5 u$ m4 ?* q- Z/ C
Switching power supplies present an electrically noisy environment for test instrumentation. When
1 {# P3 Z5 x3 X$ n# b8 W! E0 }measuring temperatures on and within switching power supplies, thermocouples are in the immediate1 C7 ^" u5 f! f/ t9 s& k c- r8 V$ H
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
& k6 _& u+ n3 U0 V# N# pmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.+ R, ]0 Q; o* r
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
, _7 o/ C$ E3 n7 xaffected less by the high frequency magnetic fields present and give more accurate results.
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+ w" Y" S5 m2 v, M% m1 B也就是说实验室尽量要用T type热电偶? |
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