|
|
CTL中有这么一句话:
% j2 N: `; K0 p' A0 }Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
3 D4 `+ u1 E" X1 aand “ J”, premium grade, are recommended.: h) {( _9 A8 B6 \' ?( j1 z( I' o
Switching power supplies present an electrically noisy environment for test instrumentation. When; ]/ ]% _* {7 S+ t5 R
measuring temperatures on and within switching power supplies, thermocouples are in the immediate1 \0 L! R4 v6 p$ g
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
' u# Q+ r% S3 T8 T' b$ Umade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic./ M: M0 r' A u- R
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
' F! i1 X& [& G2 h4 Z- s3 f+ Taffected less by the high frequency magnetic fields present and give more accurate results. H7 C# \1 i) o% D; E* H: o
. h3 f# W, K9 [; u3 a也就是说实验室尽量要用T type热电偶? |
|