Nellcor N-395 Operator's Manual page 45

Aiarm Volume
To view the current volume of the audible alarrn, press and hold
the ALARM SILENCE Button for more than 3 seconds. The
current volume level is indicated in the Pulse Rate Display as a
value from 1 (lowest) to 10 (highest). A tone at the displayed
level sounds.
To adjust the volume, press and hold the ALARM SILENCE
Button until VOL is displayed. Continue pressing the ALARM
SILENCE Button and press the ADJUST UP or ADJUST
DOWN Button to change the setting. The volume cannot be set
to zero.
Alarm Silence Duration
Alarms can be silenced for a preset period called the audible
alarm silence d~tration. To view the current setting, press and
hold the ALARM SILENCE Button for less than 3 seconds. To
adjust the setting, press and hold the ALARM SILENCE Button
(for less than 3 seconds) and use the ADJUST UP or ADJUST
DOWN Buttons to increase or decrease the value. Possible
values are 30, 60, 90, or 120 seconds, or OFF. (The OFF
selection is discussed later in this section.)
The audible alarm silence duration begins when the ALARM
SILENCE Button is pressed.
Subsequently, if any alarm condition (other than a low battery
alarm) occurs while the alarm is silenced, the alann will not
sound until the alarm silence duration period expires. Operating
the monitor on battery power during a low battery alarm
condition will cause a low battery alarm to sound, even if the
duration time has not elapsed.
SILENCE Button is pressed during the alarm
silence duration, the alarm silence duration is ended and the
audible alarms are re-enabled.
Visual indications of an alarm condition cannot be turned off.
For example, if the %SpO2 SatSeconds upper alarm limit is
exceeded, the alarm can be silenced for the alarm silence
duration, but the %SpOz value will continue to flash.