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CTL中有这么一句话:
9 f' H, f/ _# P* Z8 e" QThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
* c5 _3 P6 y1 |, i$ K! _( jand “ J”, premium grade, are recommended.
( O2 t: z, X+ X" S7 g5 [" ?' d4 ESwitching power supplies present an electrically noisy environment for test instrumentation. When
7 z3 d9 d! {" g% v- I! O6 M _measuring temperatures on and within switching power supplies, thermocouples are in the immediate5 F. t4 X" z5 y6 r0 H j/ [2 r
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are0 M! W6 Q9 G- t. C/ y( U D
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
- A% r& q, \# A, pType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are' W/ I& a3 c1 `8 p, g) [) p* L; ~
affected less by the high frequency magnetic fields present and give more accurate results.; M1 }& [8 b! p1 y
) K- _: b- a& v& y$ {* z: y7 R也就是说实验室尽量要用T type热电偶? |
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