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CTL中有这么一句话:8 p! ~3 y9 n K/ P' b3 K0 Y
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
# h7 d4 @! m/ Q2 ]% iand “ J”, premium grade, are recommended.0 H7 K0 j, L; _
Switching power supplies present an electrically noisy environment for test instrumentation. When7 ?% ~. B- w: M9 S& R7 @
measuring temperatures on and within switching power supplies, thermocouples are in the immediate$ h w5 ?% @6 W3 [
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
# q, H- {1 c) imade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
# r8 {+ g* I6 X. L1 KType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
0 v1 ` _( W: x: q: i2 z4 U, Eaffected less by the high frequency magnetic fields present and give more accurate results.. F( |3 ^8 N/ U
' y. T( u1 `/ z% d; ^$ A
也就是说实验室尽量要用T type热电偶? |
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