欧姆计使用内部的电流源和静电计电压表来进行测量。
The ohmmeter USES an internal current source and electrometer voltmeter to make the measurement.
图2-33示出静电计欧姆计测量电阻（R）的情况。
Figure 2-33 shows the electrometer ohmmeter measuring a resistance (R).
这个小的电阻值通常用数字多用表或者微欧姆计来测量。
This small resistance is normally measured with a DMM or a micro - ohmmeter.
使用静电计欧姆计时，测量准确度会受到各种因素的影响。
When using the electrometer ohmmeter, measurement accuracy can be affected by a variety of factors.
图1 -18示出另一种形式的静电计欧姆计的基本电路结构。
Figure 1-18 shows the basic configuration of an alternative form of electrometer ohmmeter.
使用具有四端测量能力的欧姆计，以避免在测量结果中计入引线电阻。
An ohmmeter with four-terminal measurement capability is used to prevent lead resistance from being added to the measurement. The source terminals are connected on either end of the contact pair.
微欧姆计和很多数字多用表使用的另一种消除偏置的方法是偏置补偿欧姆法。
Another offset-canceling method used by micro-ohmmeters and many DMMs is the offset-compensated ohms method.
对于大多数的应用来说，微欧姆计或数字多用表足以用来进行接触电阻的测量工作。
For most applications, the micro-ohmmeter or DMM is sufficient for contact resistance measurements.
欧姆计是一种很有用的仪表，可以用来迅速地测量电阻，尽管它不是一种精密仪表。
Although not a precision instrument, the ohmmeter is a useful device for rapid measurement of resistance.
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.
图1 - 24所示的脉冲驱动模式使微欧姆计能够消除被测未知电阻上的寄生偏置电压。
The pulsed drive mode, shown in Figure 1-24, allows the micro - ohmmeter to cancel stray offset voltages in the unknown resistance being measured.
因此谨慎的做法是定期地用静电计欧姆计来测量测试夹具和电缆的绝缘电阻，以保证其完整性。
Therefore, it's prudent to measure the insulation resistance of the test fixtures and cables periodically with an electrometer ohmmeter to ensure their integrity.
静电计欧姆计的电流激励(IR)流过未知电阻(RS)，然后测量dut上的电压(VM)。
Here, an electrometer ohmmeter is forcing a current (IR) through the unknown resistance (RS) and then measuring the voltage (VM) across the DUT.
与数字多用表不同，微欧姆计没有内部电阻器(RS)，所以四条引线都要连接才能进行测量。
It doesn't have the internal resistors (rs), as in the DMM, so all four leads must be connected to make a measurement.
与数字多用表不同，微欧姆计没有内部电阻器(RS)，所以四条引线都要连接才能进行测量。
It doesn't have the internal resistors (rs), as in the DMM, so all four leads must be connected to make a measurement.
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