|
CTL中有这么一句话:
. f% V U, Y( E2 G# k8 F% ` w: f; f Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
& L1 N$ p* ?9 }. b( g* k5 e and “ J”, premium grade, are recommended.
- \+ X3 J, ]; J Switching power supplies present an electrically noisy environment for test instrumentation. When
3 p% R, P% F8 ]" u2 a measuring temperatures on and within switching power supplies, thermocouples are in the immediate7 Y% F n/ Z/ ^& M9 Q3 l. Q
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
) {( n# f6 c6 [+ H9 t* S& b t( M- B* i made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic. y( Z- F8 d7 B5 B4 f
Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
& S% I. H* G) L ~ affected less by the high frequency magnetic fields present and give more accurate results.! |; J: y+ E7 o& a
0 f" c: x& F5 x- Z7 _
也就是说实验室尽量要用T type热电偶?3 s; c6 j( ]; _
|
|