Empatica EmbracePlus Instructions For Use Manual page 36

HOW TO CHECK IF EMBRACEPLUS IS RECORDING DATA
When EmbracePlus is recording data, the display background is light.
When EmbracePlus is not recording data, the display background will
turn dark. This behavior is to be expected in the following cases:
● When EmbracePlus is charging
● For a few seconds after it is removed from the cable charger to
calibrate
● For a few seconds when starting up or rebooting
● Specific error cases
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