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CTL中有这么一句话：
/ U1 h9 O$ ` b- gThermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”$ A0 o% Y$ a+ E, S4 Z! E
and “ J”, premium grade, are recommended.
! W% F- H' J0 \; l" C+ D7 ~2 FSwitching power supplies present an electrically noisy environment for test instrumentation. When1 [. O+ f, J3 y0 p) k( y
measuring temperatures on and within switching power supplies, thermocouples are in the immediate$ t4 s7 z1 Y7 l1 L s
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are
7 F5 V* X; b. B7 H; Z" R4 ~, o+ b% pmade of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic.
# s. C ^0 {! J4 A# Q8 R/ cType T thermocouples are made of non magnetic materials. As a result Type T thermocouples are
: W, g0 {1 `0 s4 z# aaffected less by the high frequency magnetic fields present and give more accurate results.6 D p( {+ {; u" [; G
' X' O- U4 r3 k9 s
也就是说实验室尽量要用T type热电偶? |
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发表于 2013-8-29 09:03
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