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Local AC Power Source Status
AC power source status indicates whether the sensor's USB connector
is receiving power from the adapter or other USB power source. If the
device isn’t receiving power from the USB source, it means that local
AC power may be lost, and the sensor is running on its internal
battery.
Power
No power
Backup Battery Status
Backup battery status indicates whether the backup battery is
installed, and the current charge status as a percentage of full charge.
Green
greater than 50%
Yellow
20 - 50%
Red
less than 20%
Grey
Battery not
connected or not
present
Note: when the battery icon is grey, you may see the message
“Battery Switch OFF” or “No Battery Installed”.