如果元件或材料发生击穿，全部电压都会加到安培计的输入端，从而可能将其损坏。
If the component or material breaks down, all the voltage would be applied to the ammeter's input, possibly destroying it.
用一对二级管以反向偏执于正常方向的形式连接至电源端，来保护过高的输入电压。
Protecting against excessive input voltages using a pair of diodes to power supply reversibly biased in normal direction.
仪器内部电路和内部的偏移电压会在仪器的输入端引起输入偏置电流。
The input bias current flows at the instrument input due to internal instrument circuitry and the internal bias voltage.
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