隔爆型热电偶、热电阻
EXPLOSION-PROOFTC AND RTD(EPTC AND EPRTD)
概述INTRODUCTION
在石油、化工等生产现场常伴有各种易燃、易爆气体、蒸气，使用普通得热电偶、热电阻容易引起环境气体爆炸。因此，必须使用隔爆热电偶、热电阻作温度传感器。隔爆型热电偶、热电阻产品适用在dⅡBT4和dⅡCT5温度组区别间内具有爆炸性气体的场所内使用。符合IEC60079标准，GB3836标准。
Usually some flammable and explosive gases or stems exist in production site in petroleum and chemical industreis.Applying general thermalcouple or themistor,ambient gases may eplode,So flameproof thermalouple or thermistor must be used to mcasure the temperature.The flameproof themalcoupe and thermistor are suitable for temperature group dⅡBT4 and dⅡCT5 and in compliance with IEC60079 and GB3836.
主要技术指标
MAJOR TECHNICAL INDEX
铠装热电偶类型、测量范围与允差
Measuring Range and Tolerance of Various TC Type
类型
Type |
代号
Code |
测量范围(℃)
Measuring Rang(℃) |
精度等级
Accuracy Class |
允许偏差△t(℃)
Tolerance△t(℃) |
K
NiCr-NiSi |
WRN |
0～800 |
Ⅰ |
*±1.5℃ or ±0.4%t |
| Ⅱ |
*±1.5℃ or ±0.75%t |
E
NiCr-CuNi |
WRE |
0～600 |
Ⅰ |
*±1.5℃ or ±0.4%t |
| Ⅱ |
*±1.5℃ or ±0.75%t |
J
Fe-CuNi |
WRJ |
0-500 |
Ⅰ |
*±1.5℃ or ±0.4%t |
| Ⅱ |
*±1.5℃ or ±0.75%t |
T
Cu-CuNi |
WRT |
-40～+350 |
Ⅰ |
*±1.5℃ or ±0.4%t |
| Ⅱ |
*±1.5℃ or ±0.75%t |
Pt-RTD
Pt10 or Pt100 |
WZP |
-200～+850 |
A |
-200～+650±(0.15+0.002|t|) |
| B |
-200～+850±(0.15+0.005|t|) |
注：（1）式中“|t|”为感温元件的实测温度。
（2）“*”表示允许偏差两者中取其大者。
Note:"|t|" :actuall measured temperature ofthe sensor.
(2)"*"means to choose whichever is more
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