基于标准表法的精密数字测温仪校准方法  

High Accuracy Temperature Indicators Calibration by Master Meter Method

作　　者：刘薇 梁俣 赵晶[3] 康慧雯 金志军[1] 邱萍[1] LIU Wei;LIANG Yu;ZHAO Jing;KANG Hui-wen;JIN Zhi-jun;QIU Ping(National Institute of Metrology,Beijing 100029,China;Guangxi Research Institute of Metrology&Test,Nanning,Guangxi 530299,China;National Institute of Measurement and Testing Technology,Chengdu,Sichuan 610021,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]广西壮族自治区计量检测研究院,广西南宁530299 [3]中国测试技术研究院,四川成都610021

出　　处：《计量学报》2022年第2期205-209,共5页Acta Metrologica Sinica

基　　金：国家重点研发计划(2017YFF0205905)。

摘　　要：参考流量与电学计量领域利用标准表对仪器进行校准的方法,提出一种采用高精度的测温电桥与高稳定性的直流电阻箱组合作为标准装置,校准精密数字测温仪的方法。用此方法对精密数字测温仪进行校准并进行测量不确定度分析,结果表明在-195~660℃氛围内,温度示值误差的合成标准不确定度为0.5~0.7 mK。此方法采用的标准器准确度比现有的校准方法更高,并可以在更广的环境温度范围内应用。A method of calibrating high accuracy temperature indicators using the combination of DC comparator bridges for measuring temperatures and DC resistance box as the standard device was proposed,which referred to the method of calibrating the instrument using master meter method in the field of flow and electrical measurement.The method was used to calibrate a high accuracy temperature indicator,and the measurement uncertainty was analyzed.The calibration results showed that the combined standard uncertainty of temperature indication deviation was 0.5~0.7 mK in the range of-195℃to 660℃.The accuracy of the standard instrument used in this method was higher than that of other existing calibration methods,and it could also be applied in a wider range of ambient temperature.

关 键 词：计量学 测温仪 标准表法 校准 不确定度评定 

分 类 号：TB942[一般工业技术—计量学]