Another consideration when measuring voltages from highresistance sources is the input bias current of the voltmeter.
在测量高电阻源时要考虑的另一个问题是电压表的输入偏置电流。
2
Highresistance measurements using the constant-current method may be made using either an electrometer voltmeter and current source or just an electrometer ohmmeter.
采用恒流法，可以使用静电计电压表和电流源或者只使用静电计欧姆计来测量高电阻。
3
Therefore, a voltmeter with high input resistance, such as an electrometer, is required.