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CTL中有这么一句话：: T; w* o& Q( z% Y% [
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
" W% m ~2 K. y% y" [9 eand “ J”, premium grade, are recommended.
: U% Z' G4 t5 ^, Q5 I% [Switching power supplies present an electrically noisy environment for test instrumentation. When) @( E- t. |; E
measuring temperatures on and within switching power supplies, thermocouples are in the immediate
# _6 X) r$ d8 f |! Nvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
; V$ w2 A1 L' z- Omade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.8 g* y( _7 H' [) P- }
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
) Y( W% X+ ~. Paffected less by the high frequency magnetic fields present and give more accurate results.
# ^/ J! l2 l4 u; S
/ E* K1 v' [5 L& _- U! W" E, B也就是说实验室尽量要用T type热电偶? |
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