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CTL中有这么一句话:
4 X. q8 ~$ U. w+ f4 D% p+ q" C. P0 J Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”1 F; |5 I8 i; v; O+ ]4 G9 N! I
and “ J”, premium grade, are recommended.% ^5 Y# {- l5 T2 {/ s7 W1 W
Switching power supplies present an electrically noisy environment for test instrumentation. When
9 G0 I- F* x- J9 Z& E measuring temperatures on and within switching power supplies, thermocouples are in the immediate o B' n$ [" ^7 _2 [9 s( A
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are s9 `+ n8 F. |) g9 c
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.) c3 d/ L$ v6 f% v2 v/ w7 ]2 `4 K
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
5 W" d% ?" {$ [ |5 f) Z" ^ affected less by the high frequency magnetic fields present and give more accurate results.+ F8 L( g5 H, o+ T
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也就是说实验室尽量要用T type热电偶?
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