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CTL中有这么一句话：
& {+ A, K% ~4 h5 Y% o; k! y$ S Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”5 C- ?* \- o/ r1 s' y; o
and “ J”, premium grade, are recommended.
4 C. [! r6 s4 V0 }- F/ O8 i) \7 L Switching power supplies present an electrically noisy environment for test instrumentation. When
& R8 K* ^+ ? \0 Z! b3 d measuring temperatures on and within switching power supplies, thermocouples are in the immediate$ {* _* G' l& W$ Q9 k) i- R- V4 F
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
0 U" }2 ?: v# s! r/ z made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
! t4 U4 [3 z0 ~; W( ]7 G& B, e Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
' C5 h+ r4 Z) c( r& W% k, S4 l, V& o affected less by the high frequency magnetic fields present and give more accurate results.7 v$ x7 A2 l- n/ x* W
% n8 R5 b5 d* r8 A( e0 \' I5 m) z& ~
也就是说实验室尽量要用T type热电偶?
- f$ T7 l5 c6 i- a/ J |
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发表于 2017-3-9 16:01
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