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根据热电偶的测温范围不同,对其校准的方法及示值误差的不确定度评定也不同,其中针对-40℃~300℃测量范围内的低温热电偶的校准,依据JJG351-1996《工作用廉金属热电偶检定规程》,300℃以下在恒温油槽中与标准水银温度计进行比较,因标准水银温度计不能输出电量信号,无法连接电测设备,测量原理无法实现自动检定,因此目前主要使用二等标准铂电阻作为标准器。本文就以二等标准铂电阻为标
According to the thermocouple temperature range of different methods of calibration and indication of the uncertainty of the assessment of error is also different, which for the -40 ℃ ~ 300 ℃ measurement range of low-temperature thermocouple calibration, according to JJG351-1996 “work With low metal thermocouple test procedures ”below 300 ℃ in the thermostatic tank with a standard mercury thermometer for comparison, due to the standard mercury thermometer can not output power signal can not connect the electrical test equipment, measuring principle can not be achieved automatically, so the main use of two Other standard platinum resistance as a standard device. This article on the second-class standard platinum resistance as the standard