标题: 热电偶的选型 [打印本页] 作者: ubuntufan 时间: 2017-3-9 16:01 标题: 热电偶的选型 CTL中有这么一句话： k0 o# \ v3 Z ~/ O
Thermocouple not included in the Instrument accuracy of measuring range. Thermocouples type “K”, “T”+ B$ V5 \- O: f2 a# [
and “ J”, premium grade, are recommended. ' {5 F: m7 o$ N1 S6 A Switching power supplies present an electrically noisy environment for test instrumentation. When % v$ y: u3 U6 @# H5 q* `- T measuring temperatures on and within switching power supplies, thermocouples are in the immediate" U- l {; w0 U: e# L/ b* {: \
vicinity or in intimate contact with component sources of the electrical noise. Type J thermocouples are/ \: g* F7 l$ y1 Z% k" A* @
made of material that is magnetic. Type K thermocouples are made of material that is slightly magnetic. ; H* A1 P( h9 W: ?0 }0 { Type T thermocouples are made of non magnetic materials. As a result Type T thermocouples are( @7 H+ R1 N- M9 x' B
affected less by the high frequency magnetic fields present and give more accurate results.) V5 m8 H8 m" Z' r
