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CTL中有这么一句话：
" A* r& v1 P/ o4 C( H, v0 |& qThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
/ d0 J7 l) K' Z: Hand “ J”, premium grade, are recommended." H0 f5 }4 ]* u$ L0 N7 l! D6 |/ w/ e
Switching power supplies present an electrically noisy environment for test instrumentation. When
0 j/ G% b$ S' bmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate& Z# j% N( C. w6 q
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
# U& i4 ?: f/ ~made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.$ l1 b5 h! d! u; }$ t& S
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
_5 B) g" J! ^) b7 \affected less by the high frequency magnetic fields present and give more accurate results.
$ C3 |7 ]% M! H# z- z) { B: Q
; a6 u# E8 n0 y: ~) ~也就是说实验室尽量要用T type热电偶? |
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发表于 2013-8-29 09:03
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