Press "-", and the image will automatically run down to the zero-point calibration position and then stop.

按“-键”画面自动下行到零点校正位并停止运行。

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Press the "reset" key and deletes the zero position error caused by the shift of the zero point in the sensor.

“清零”键，清除传感器因零点飘移而产生的零位误差。

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