|
|
CTL中有这么一句话:
7 G. e7 O& o1 D0 LThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
8 G5 E8 c( X* N2 O7 q# Qand “ J”, premium grade, are recommended.
U- ]3 O6 R0 {& r; NSwitching power supplies present an electrically noisy environment for test instrumentation. When
8 w$ F) `# ]5 `# c+ ~0 |measuring temperatures on and within switching power supplies, thermocouples are in the immediate
3 P; s. S- k4 D9 U- [" kvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are h0 s' g' {; x% i9 O
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic." W# k+ v6 B" m0 C5 k" E8 e" R- y
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are- u6 ]% i9 z* }% i: ~
affected less by the high frequency magnetic fields present and give more accurate results.
9 u$ @! I4 R$ N+ z% E% a; r& C+ c& A( i
也就是说实验室尽量要用T type热电偶? |
|