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CTL中有这么一句话:
! e# z+ C, O* l. JThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”$ y6 s$ f W0 `- b2 D) I
and “ J”, premium grade, are recommended.
2 p: ~" {$ K* T, W& W# k6 jSwitching power supplies present an electrically noisy environment for test instrumentation. When
" g; u/ E/ w1 ]' Rmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
! q( t3 V. W; V( l% Gvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are0 k1 S4 e7 ^$ @. I) `
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic. Q$ L. y4 ^4 J; F
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are/ F. @- ]* N2 L7 e& f
affected less by the high frequency magnetic fields present and give more accurate results.+ h5 Z3 T! X" l
: a3 d, t% i! c
也就是说实验室尽量要用T type热电偶? |
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