|
|
CTL中有这么一句话:
. A" e3 y% l6 v: fThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”
. [! [# H, e# G7 B7 ^and “ J”, premium grade, are recommended.( V) d% X& Y. m$ ]# i! ~: D
Switching power supplies present an electrically noisy environment for test instrumentation. When0 O/ x3 V; a( `% Y2 v9 U( h/ n
measuring temperatures on and within switching power supplies, thermocouples are in the immediate7 W4 G+ L) H" W2 I L2 Y
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
, v2 W o3 D3 V) b/ qmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
: S* r; a9 s) F* U4 ]Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are W ?( Q2 N7 U+ p, y! O7 w
affected less by the high frequency magnetic fields present and give more accurate results.9 B |; N5 |' S- g; n3 I9 A
8 u, g* E' z. k7 ` q% T也就是说实验室尽量要用T type热电偶? |
|