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CTL中有这么一句话:
" L- k! R2 x* V! y+ k Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”$ G" _, l8 Y5 Y" g0 S d7 w4 K9 z1 Y
and “ J”, premium grade, are recommended.! k, \0 r- i% \; X0 ?5 P) H
Switching power supplies present an electrically noisy environment for test instrumentation. When+ G3 ?1 }9 C% J2 R: K$ J) p& m E
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
7 S; G7 D8 v9 l4 ^8 R, E vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are) ^8 a b6 J' J/ A' O
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic." E! N7 t6 h4 h+ E8 B2 p# a1 g" n
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are( {7 B" f" b' \; ~8 Y% i
affected less by the high frequency magnetic fields present and give more accurate results.5 e, ?) h/ X. x$ q J% T- A
9 T# x: |; B7 N/ {' S6 T# r 也就是说实验室尽量要用T type热电偶?
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