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CTL中有这么一句话：
0 D( @4 u' q, x4 p* p- Y) J' d1 `Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”, b& @% |# t* N) q+ m/ {0 l; Z* W
and “ J”, premium grade, are recommended.
+ L; b8 E" q0 b3 |3 NSwitching power supplies present an electrically noisy environment for test instrumentation. When) A% w7 m5 k# [) ^* D+ W
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
! x# I |. r/ d- J7 bvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are( m y8 ?, T0 i4 q* G
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
- s& F( P9 {& q7 R+ @. e) PType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
8 |" P, d: L) ]7 N R7 u# Kaffected less by the high frequency magnetic fields present and give more accurate results.
0 W) k) K+ E+ P* c% h% j$ {" H: p
也就是说实验室尽量要用T type热电偶? |
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发表于 2013-8-29 09:03
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