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。
Another consideration when measuring voltages from high resistance sources is the input bias current of the voltmeter.
如果使用分离的电流源和电压表来进行低电阻测量，则必须检查每台仪器的非欧姆接触情况。
If using a separate current source and voltmeter to make low resistance measurements, each instrument must be checked for non-ohmic contacts.
所以需要使用具有高输入电阻的电压表，例如静电计。
Therefore, a voltmeter with high input resistance, such as an electrometer, is required.
注意，这种测量方法是两线电阻测量，而使用静电计电压表和外部电流源则可以进行四线测量。
Notice that this is a two-wire resistance measurement compared to using the electrometer voltmeter and external current source, which can make a four-wire measurement.
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。
High resistance measurements using the constant-current method may be made using either an electrometer voltmeter and current source or just an electrometer ohmmeter.
与四点同线探针法一样，如果样品电阻和电压表的绝缘电阻（电压表的公共端到地）是同一数量级的，就可能需要使用差分测量。
As with the four-point collinear probe method, a differential measurement may be required if the sample resistance is of the same magnitude as the isolation (meter common to ground) of the voltmeter.
详细介绍了用直流数字电压表法校准电阻箱的原理、数学模型及测量不确定度评定方法。
This paper introduce in detail the principle of the calibration of resistance box by method of direct current digital voltage meter, mathematics model and the way of uncertainty evaluation.
数字式电压表在测量低于20欧姆的电阻时﹐会因为引脚的电阻而使测量不准确。除非它是一个四线欧姆表。
DVM is not accurate in measuring resistance below 20 ohm due to the lead resistance, unless it is a 4 wired ohm meter.
当电池容量大时，其内电阻小，不同类型电压表测得开路电压值的误差就小。
When the battery capacity is large, its internal resistance is small and the error is small for the values measured by different models of voltmeter.
其功能相当于电压源、电流源、电压表、电流表和电阻表的综合体。
Its function is equivalent to the voltage source, current source, voltage meter, current meter and resistance meter.
低电阻电压表通过电流相当大，可能使镉电极发生变化。
Low - Resistance -voltage electric current running through a large table may be the metal electrode...
低电阻电压表通过电流相当大，可能使镉电极发生变化。
Low - Resistance -voltage electric current running through a large table may be the metal electrode...
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