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CTL中有这么一句话:
2 b0 F" S# r7 j( H9 K9 ~Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”+ h( o# O+ ^) y7 |7 s4 N, q$ R
and “ J”, premium grade, are recommended.5 N' Y# u+ |! t0 ?6 T
Switching power supplies present an electrically noisy environment for test instrumentation. When; m; F: k# y( ]
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
, l- I1 f- E6 x" b1 x& |vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
4 D; j$ i, L d B5 `% b- Mmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic./ p! J* J8 v8 m' q5 a
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
3 C& n3 ]+ J8 {" ~" y' S' W1 D% baffected less by the high frequency magnetic fields present and give more accurate results.3 a- g- G1 r( A- q* G7 `
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也就是说实验室尽量要用T type热电偶? |
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