Adopt strict charge to manage the circuit, it can protect with overload, undervoltage, short circuit, etc. output for standard USB power supply interface.

采用最严格的充电管理电路，具有过载，欠压，短路等多重保护，标准usb电源接口输出。

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Owe system the amounts adjusting a circuit carrying out calibration and comparison method on standard wave form , may measure out part discharging looking at in electric charge by JFD-301.

该系统通过JFD-301校准脉冲发生器对标准波形进行校准及比较法，可测量出局部放电的视在电荷量。

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