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CTL中有这么一句话:. {! [- o- a; n
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
/ E/ l; R5 q! aand “ J”, premium grade, are recommended.! O; f; J7 g, L9 Y- d& J
Switching power supplies present an electrically noisy environment for test instrumentation. When
* o. p* d: e$ T5 w; Z0 `( `measuring temperatures on and within switching power supplies, thermocouples are in the immediate9 f) a$ @) h+ R% H7 C
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are+ b& ]* a R( w# L
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.7 U1 _. `6 d/ O- |6 B# O V
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are2 t3 [# v5 I- {0 i8 v/ O' ?
affected less by the high frequency magnetic fields present and give more accurate results.
. j; ~+ O) J3 T9 l
" c9 D5 V- F* y2 Z( U也就是说实验室尽量要用T type热电偶? |
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