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CTL中有这么一句话：$ d2 w' k6 y$ W& p
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
2 ^. n6 X6 X7 k" l$ I0 x band “ J”, premium grade, are recommended.
4 m* ^ m) X6 D0 P/ |3 B3 zSwitching power supplies present an electrically noisy environment for test instrumentation. When
$ N6 G, t9 @4 h; O% mmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
+ G) A+ [* ?- p6 i. D zvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
4 z; k+ c; C6 o& x/ z1 dmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
- h# X: I$ Q n% N7 u0 ^ QType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
1 ^2 R, v# [7 }9 r% c( Y! ]affected less by the high frequency magnetic fields present and give more accurate results.
+ s# Q9 T( f5 A B0 i3 R+ g+ g" X9 V5 Z2 a' M/ Z" s
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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