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CTL中有这么一句话:( g. ] X6 _4 Z, u, I
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”, {8 F% Z% ~0 ?$ J% |
and “ J”, premium grade, are recommended.& G( `' w) l" H; Y' L& I- G/ a
Switching power supplies present an electrically noisy environment for test instrumentation. When
( u0 \9 ~' E$ f) k4 p. z0 Bmeasuring temperatures on and within switching power supplies, thermocouples are in the immediate
- A- a0 a7 j) G" u# vvicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
, {! k# d( h0 {5 d; |! e! D+ x; xmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.' p" P0 z. U" m8 O" Y- z
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
g% q: B- A% t2 `/ ~1 d' [affected less by the high frequency magnetic fields present and give more accurate results.
& T! c, w, N* Y6 t6 P
# f: ?2 G( |( \' c3 z) c! e也就是说实验室尽量要用T type热电偶? |
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