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烟道,风道热电偶,WRER-12,
参考价:

型号:WRER12

更新时间:2024-12-07  |  阅读:1595

详情介绍

烟道,风道热电偶,WRER-12,
 
量程规格

类别
代号
分度号
测温范围℃
精度等级
允许偏差△t
镍铬-镍硅
WRNT
K
0-800
I
±1.5℃或±0.004∣t∣
II
±2.5℃或±0.0075∣t∣
镍铬-铜镍
WRET
E
0-600
I
±1.5℃或±0.004∣t∣
II
±2.5℃或±0.0075∣t∣
铜-铜镍
WRCT
T
-40-350
I
±0.5℃或±0.004∣t∣
II
±1℃或±0.75%t
铂电阻
WZPT
Pt100
-200-500
*
±(0.15+0.002∣t∣)
B级
±(0.30+0.005∣t∣)
铜电阻
WZCT
Cu50
-50-100
II
±(0.30+6.0X10-3t)

注:“t”为感温元件实测温度,对于铂电阻和铜电阻则为感温元件实测温度的值。
公称压力
一般是指在常温下,保护管所能承受的静态外压而不破裂,试验压力一般采用公称压力的1.5倍。实际上,允许工作压力不仅与保护管材料、直径、壁厚有关,而且还与其结构形式、安装方法、置入深度以及被测介质的流速、种类有关。
热电偶绝缘电阻:
常温绝缘电阻的试验电压为直流500V。测量常温绝缘电阻的大气条件为:温度15~35℃,相对湿度45%,大气压力86~106Kpa。
对于长度超过1米的热电偶,它的常温绝缘电阻值与其长度的乘积不小于100兆欧·米,
即:Rr·L≥100MΩm  L>1m
式中:Rr-热电偶的常温绝缘电阻值,MΩ;
L-热电偶的长度,m。
对于长度等于或不足1米的热电偶,它的常温绝缘电阻值应不小于100 MΩ。
热电阻绝缘电阻:
常温绝缘电阻的试验电压可取直流10~100V任意值,环境温度应在15~35℃范围内,相对湿度应不大于80%,常温绝缘电阻值应不小于100 MΩ。

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