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When contact the power supply, the screen shows welcome window firstly and then comes into main interface. The first line displays voltage, power and data set. The second line displays current and accumulated capacity.
Current zero calibration function:Because of the influence of component aging and temperature variation after long-term use, the error may become bigger when it measures small current. So you can keep pressing the button on the back to connect power supply in the no-load terms, until the LED lights. The calibration is accomplished.
In the main interface, you can click the button to switch data set one by one. And it provides for storing and checking 0 to 9 totally ten group data set.
Capacity stored function:When data set is between the 1 to 9 group, the current capacity will be stored after power off. And the stored capacity will be accumulated after power on. When the data set is 0 group, the current capacity will be stored after power off. When power on next time, the stored MAH is blinking displayed .When the new MAH is up to 1 MAH, the stored MAH will be covered, and the values will start over.
Screen rotation function:In the main interface, keep pressing the button, until the LED lights and then goes out (time about 4s), loose the button, the screen is rotated and automatically stored for being used next time conveniently.
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