Nonin Avant 4100 Operator's Manual page 17

Using the Avant™ 4000 Digital Pulse Oximetry System
Alarm Volume LED
This amber LED indicates that the Alarm Volume can be reviewed or
adjusted using the Plus (+) and Minus (-) buttons.
Connection Status LED
This LED is lit green when a patient module is connected with the
display unit. It is lit amber when no devices are connected, and it
blinks during device pairing. The Connection Status LED works in
sync with the patient module's connection status indicator.
Remote Battery Status LED
This amber LED alerts users to marginal or critical battery conditions
for the wrist-worn patient module. When the patient module's
batteries are marginal, this LED blinks. When battery capacity is
critical, it remains lit steadily.
AC Power Adapter LED
This green LED is displayed when an external power supply is
providing power to the display unit.
Battery LED
This amber LED indicates a marginal battery charge when blinking.
In addition, this LED—when lit steadily—indicates that the battery
charge is being displayed. This LED does not indicate that the display unit
is running on battery power. The battery charge indication will not be
accurate before one full charge/discharge/recharge cycle with a new
battery pack.
WARNING: The battery pack must be installed at all times
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while the device is operating—even when
operating on AC power. If it is necessary to
operate the device without batteries, audible
alarms and memory functions may not be
available. DO NOT use the device without
batteries when patient safety relies upon audible
alarms.