便携式双电桥校验仪的正确检定

Calibration Methods of Portable Double Electrical Bridge Regulator

便携式双电桥校验仪由高精度低阻十进盘和标准电阻盘组成 ,是检定便携式双电桥及各种毫欧计、微欧计的标准仪器。检定它的关键是对非十进小电阻以优于 3× 10 -5的不确定度进行测量 ,这在直流计量中是难度比较大的。指出了常用的电阻箱检定方法的不适用性 ,给出了四种正确的检定方法。

Portable double electrical bridge regulator is composed of high precision low impedance denary pane and standard resistance pane, and it's standard apparatus used to check up portable double electricity bridge & iexcl; & cent; milli-ohm apparatus and micro-ohm apparatus. The key of accurate measurement is ma-king measurement to non-denary small resistance with precision higher than 3 & iexcl;& Aacute; 10 -5 ,it's difficult in direct current measurement. This article refers to non-applicability of resistance measurement methed in common use, and affords four accurate measurement methods.