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CTL中有这么一句话:
! @$ M0 ?0 D) w6 Y7 ^ {$ YThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
) ?; z* S* l. P' D# c5 H. Z1 w6 fand “ J”, premium grade, are recommended.) V/ @/ q1 p7 g% Z) Q
Switching power supplies present an electrically noisy environment for test instrumentation. When
3 i8 `4 I, V- z3 s7 y- P( q8 {8 lmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
( N9 Z& U# u( Y+ I( h5 t. Jvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
; l8 n0 T# A# _3 s" ` n3 A$ smade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.: g+ [+ w2 ^) r9 D9 N
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
/ X8 d6 t* o, L; v7 {; Naffected less by the high frequency magnetic fields present and give more accurate results.
3 K" b$ d* s( |# A$ C
9 @: J0 D0 V( h* Q6 F; S' q也就是说实验室尽量要用T type热电偶? |
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