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CTL中有这么一句话：2 ~5 o3 ]+ F3 _0 z q/ R$ \
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”3 Q! Y4 @2 _, g: I
and “ J”, premium grade, are recommended.
& b y$ U( U2 H$ ]+ nSwitching power supplies present an electrically noisy environment for test instrumentation. When
7 ]# q' ^+ O' M4 ymeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
, A/ E* S. Y" l, K& W; w: h8 avicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
1 _, C$ B) g( D& Ymade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
7 { U4 e" O) g5 b$ t& EType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are* Q/ Y. \. E' y& b. A6 l' `8 t, S
affected less by the high frequency magnetic fields present and give more accurate results.
0 N f H7 V; N" e- @. j$ O# V$ T, V# N7 Y- A. G4 T8 m
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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