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CTL中有这么一句话:5 o/ y, ]1 C8 x# c2 t$ I4 G& ?8 Y
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
# i7 M+ [. U- a; U) G3 J! t9 d* Dand “ J”, premium grade, are recommended.
3 _( R6 {! K4 M% z0 vSwitching power supplies present an electrically noisy environment for test instrumentation. When
4 J0 R8 ] y3 H" ameasuring temperatures on and within switching power supplies, thermocouples are in the immediate! [* Q2 x8 [. p& V
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are$ H) E R7 \9 {7 h5 p9 @: h: y& ~
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic." H( k" F3 ^/ ]; C
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are' X' ]* m, H& e
affected less by the high frequency magnetic fields present and give more accurate results.+ o! m; h1 H4 n/ \2 v4 p9 U
% e$ m3 T# j) v也就是说实验室尽量要用T type热电偶? |
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