N an instrument for measuring potential difference or electromotive force 伏特计
Please return these ammeters and voltmeters on board as soon as they are rectified.
电流表与电压表效正后请尽快送回船上。
A kind of circuit for automatic range selection of voltmeters is introduced and designed.
提出并设计了一种适用于电压表的量程自动转换电路。
This normalizing device is a standard instrument used to calibrate the intrinsic errors of the various kinds of electronic voltmeters.
该校准仪是用于校准各种电子电压表基本误差的专用标准仪器，具有定点频率下正弦波信号输出的标准电压源。
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