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Enable screen lock on EM6400
Press the left and right arrows simultaneously in any of the Main/Sub pages to set that page as the default lock page. After two minutes of inactivity, the meter will default back to the lock page.
Note: Locking the page will prevent entry into setup (both through the Edit menu as well in Power ON setup mode).
To disable the screen lock feature, press the left and right arrows simultaneously when on any of the Main/Sub pages.