Operating instructions

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7.2.3 OPERATING (NAVIGATION)
The 4 keys for navigation control the following functions:
“▲” Key: Press this key to scroll upwards in the menu levels or
to alter a value you want to set.
If you press this key in the status display, you will
access the “UPS On or Off” menu item.
“▼”Key: Press this key to scroll downwards in the menu levels
or to alter a value you want to set.
“ENTER” Key: Press this key briefly to select the corresponding
menu item. To confirm and store a menu item in the
“Settings” menu, press this key and hold it down for at
least 1 second.
“ESC” Key: Press this key to return to the previous menu level
without altering any settings. If you press this key in
the status display, you will access the main menu.
You can also temporarily disable a notice warning tone by pressing
any key.
If no key is pressed, the display returns automatically back to the
standard display after 5 minutes. Should you want to recall a specific
reading - press "freeze" menu for about 3 seconds at the same time
with the "▲" and "▼" buttons. A small key in the upper right display
indicates the setting. A new simultaneous operation of these two
buttons for 3 seconds re-cancels the setting.