8 Operation
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8.1.3 Menu structure
At the operating level, 3 different navigation buttons are available to select ap-
propriate screens for display and control of device functions.
The "Device menu" and "Alarm/event list" menu levels are also displayed by
means of corresponding buttons. The device menu contains submenus for set-
ting, servicing, and diagnosing the device and its functions.
The memory manager opens automatically as soon as a USB flash drive is in-
serted into the USB host interface. It exchanges data between the device and
the flash drive.