广西壮族自治区实验室pH计比对分析

Comparison and Analysis of pH Meters in Laboratories of Guangxi Zhuang Autonomous Region

2023年,广西壮族自治区计量检测研究院作为主导实验室,实施了全区pH计检定装置计量比对工作,共有16家实验室参比。比对以传递标准的形式,采用双环形的线路进行。比对项目包括电计pH挡示值误差,电计电压挡示值误差,输入电流、输入阻抗引起的示值误差,温度补偿引起的示值误差,仪器示值误差以及盲样测试。通过比对结果总结出实验室存在的问题,并提出改进意见。

In 2023,institute of Guangxi Zhuang Autonomous Region Metrology and Testing conducted the metrology comparison of pH meter verification devices as the pilot lab.There were 16 reference laboratories.The sample instruments for comparison is transmitted in double-loop circuit.The items of comparison included pH indication error,voltage indication error,input current,input impedance indication error,temperature compensation indication error,instrument indication error and blind sample test comparison.Through the results of comparison,the existing problems in the laboratory are summarized,and suggestions for improvement are put forward.