装置的输出是利用接触调压器的特点，实行大范围幅值控制，进行手动调压。

The output of the device uses the characteristics of the contacting transformer to implement the amplitude control within a large range to realize manual voltage regulation.

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可全自动地将伏安特性曲线测试描绘出来，省去手动调压、人工记录、整理、描曲线等烦琐劳动。

Can automatic testing ground will volt-ampere characteristics curve traced, save manual pressure regulation, artificial records, sorting, tracing curves, and so cumbersome labor.

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将手动直流调压装置改造为自动调压装置及原理分析。

C. pressure regulating device into automatic pressure regulating device and its principle analysis.

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