To extend the coulombs ranges, an external capacitor is used as the feedback element.
为了扩展库仑测量范围，使用外部电容器作为反馈元件。
The position loop use optical encoder as the feedback element. It is used to search and track the target.
位置回路采用光电编码器作为反馈元件，完成对目标的搜索、跟踪。
The external feedback mode allows an external device to be used as the feedback element of the electrometer.
外部反馈模式允许使用外部器件来作静电计的反馈元件。
When in the external feedback mode, the electrometer will display the voltage across the feedback element. The unknown charge can be calculated from the following formula.
在外部反馈模式下，静电计显示反馈元件上的电压。未知电荷可以由下式计算。
When in the external feedback mode, the electrometer will display the voltage across the feedback element. The unknown charge can be calculated from the following formula.
在外部反馈模式下，静电计显示反馈元件上的电压。未知电荷可以由下式计算。
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