热效应电流表设计及相关指标的研究

Research on Design and Related Indexes of Thermal Effect Ammeter

分析了热效应电流表的测量原理,研究设计了一种利用电流热效应测量电流大小的实验装置,并通过以参考电流表所测电流为参考值,热效应电流表所测电流为实验值,根据两者相对误差确定热效应电流表准确度和精确度,通过实验原理及所用器材参数,确定了设计得到的热效应电流表的量程、分度值和准确度等级.

In this paper,the measuring principle of thermal effect ammeter is analyzed,and an experimental device for measuring the current by using the thermal effect of current is studied and designed.By taking the current measured by the reference ammeter as the reference value and the current measured by the thermal effect ammeter as the experimental value,the accuracy and accuracy of the thermal effect ammeter are determined according to the relative error between them.The measuring range of the designed thermal effect ammeter is determined through the experimental principle and equipment parameters,Division value and accuracy level.