|
CTL中有这么一句话:
# T1 c5 ?% G5 j: @ z* c# k2 Q Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”4 M1 Z+ I0 w$ d; A. K
and “ J”, premium grade, are recommended.. Q: g' P) Y4 T. |$ `* K
Switching power supplies present an electrically noisy environment for test instrumentation. When( R; u. m0 B; g+ }* F' @$ t
measuring temperatures on and within switching power supplies, thermocouples are in the immediate' n8 z4 ?& L# E4 A6 M- F3 G3 n
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
# l$ H$ A) Y! L B' n1 A' s& q made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
, R" J9 w8 M/ ~" e, t* c2 v& e Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
2 T3 z) H2 |# ~ affected less by the high frequency magnetic fields present and give more accurate results.6 y k I( B7 m5 m
0 g2 K# k7 ]; E* I
也就是说实验室尽量要用T type热电偶?9 G" H/ l& c$ w
|
|