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CTL中有这么一句话：
g7 q- d P+ W6 G% M3 _- uThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
2 k3 e! j7 C6 q# W, z$ p f! Kand “ J”, premium grade, are recommended.
4 ~, c( F" z. |. s: @5 B; V# uSwitching power supplies present an electrically noisy environment for test instrumentation. When
& ]6 p4 X. }. j$ w y& Fmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate& U) B! m9 p, N- `! r+ a/ U& b
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are) U9 D# ~0 Z1 J& \7 v/ O$ _
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.* L1 {6 ~3 h: `( i8 ^2 p
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are. [6 m# Q/ Q3 R9 ]3 v6 A
affected less by the high frequency magnetic fields present and give more accurate results.
4 m Y2 U$ z+ Q. v$ e9 m; a% f! S9 T9 e0 k
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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