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CTL中有这么一句话：# R! E8 ^* B; o2 \+ I1 V( n
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
& P, b( [$ C- g% w' n" U; {- [' @and “ J”, premium grade, are recommended.$ _* a2 _" J- ?( A6 ]
Switching power supplies present an electrically noisy environment for test instrumentation. When
3 a2 x' w3 C0 zmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate$ P# t, h7 g0 _8 V$ a1 `/ \, O
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are" _! i0 D" l* c7 U+ P/ T
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
: u+ |1 w# V0 w* p$ TType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are* V! v& R, k9 W I j
affected less by the high frequency magnetic fields present and give more accurate results.
) Y# \7 `! E$ B1 {- S, n8 ^. q5 \+ X. {' Z8 }
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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