要确保输入端钳位电压足够的高，以避免由于源接点的非线性而产生的问题。

Make sure the compliance voltage is high enough to avoid problems due to source contact non-linearity.

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图2 - 7说明分流电容对典型的高输入阻抗电压表输入端的影响。

Figure 2-7 demonstrates the effects of shunt capacitance loading on the input of a typical high impedance voltmeter.

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根据定义，保护端与该高阻端处在几乎相同的电位，所以保护端就与电压源为相同电位。

By definition, the guard terminal is nearly at the same potential as the high impedance terminal, so the guard terminal will be at the same potential as the magnitude of the voltage source.

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