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CTL中有这么一句话:4 N/ j$ ?8 n. B/ i
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”; t0 v! ?+ b. W2 I: r* [/ E
and “ J”, premium grade, are recommended.
. t9 E9 l. v' @ Switching power supplies present an electrically noisy environment for test instrumentation. When+ `* o& a' ~5 E$ ?+ x ^. \) Z& l
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
4 C/ h$ t1 I( b% S& \ vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
& M7 i+ @; h* H+ ~/ p0 [" L made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.1 g, e2 g7 o9 ?* l! [. m/ ?- C% q
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are2 ^! ]2 {6 t% k z- I
affected less by the high frequency magnetic fields present and give more accurate results.9 q+ E2 }$ }1 H' J' x0 w
( L% G7 y$ P$ x4 D+ \) m5 G/ k
也就是说实验室尽量要用T type热电偶?) l4 z) T) z( k
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