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CTL中有这么一句话:3 W3 B8 Z- m0 M9 ~8 W k
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”1 i# o; Q6 c4 f: I( h4 ~- g
and “ J”, premium grade, are recommended.
. X* U+ ]! a/ V+ b Switching power supplies present an electrically noisy environment for test instrumentation. When9 j {) ^; f/ L& k
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
* S w. V- ?" h$ [ vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
5 ^& Q6 x9 i8 c* k* M made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
" U8 ]' B- t$ C: l0 d+ I* D; k Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
1 @; F! ?% V; b; I1 w T3 ` affected less by the high frequency magnetic fields present and give more accurate results.8 r! |$ a' a5 t! s6 M$ y/ }
/ ]; w5 ]2 t0 T6 _& T2 E- X 也就是说实验室尽量要用T type热电偶?
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