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Instructions:
Hide the interface: long press and hold any key and then power on will display three
options(as the following picture show). The first item is to set the Chinese language,
the second item is to set the English language, and the third item is the current zero
calibration (when the function is performed, no load access must be guaranteed).
Keep pressing and holding the key to move shadow in turn. Release the key at the
selected item to execute the setting. If the button is still not released after three
items are displayed, it means that no function is performed and will exit the hidden
option interface.
Main interfaceⅠ: (main measurement interface)
3: Cumulative capacity value
4: Cumulative energy value
7: Load equivalent impedance
Short press "help" button, the interface is as shown above: