Nellcor N-200 Operator's Manual page 38

Guide to Operation
Adjusting Audio Alarm Volume
WARNING: Do not set the alarm volume too low to be
heard.
WARNING: When the AUDIO ALARM OFF button has
been pressed and the AUDIO ALARM OFF indicator is
illuminated, no audio alarm sounds in the event of an
adverse patient condition. The AUDIO ALARM OFF
button must not be used in situations in which patient
safety could be compromised.
To adjust audio alarm volume, press and hold both the HIGH
SAT and LOW SAT buttons, and turn the control knob
clockwise to increase the volume or counterclockwise to
decrease it.
Silencing the Audio Alarm Temporarily
WARNING: If the operator silences the audio alarm
during a pulse search alarm, then the audio alarm will
not resume at the end of the alarm silence period, even
if the pulse search event is continuing. If the alarm has
been silenced, the operator should continue to visually
check whether a pulse is being displayed.
To silence the audio alarm for 60 seconds, press the AUDIO
ALARM OFF button once. The AUDIO ALARM OFF indicator
lights steadily to show that the audio alarm has been silenced
temporarily. After 60 seconds, the alarm sounds again if the
alarm state continues.
Adjusting the Temporary Silence Period
To change the period during which the audio alarm is silenced
temporarily, press and hold the AUDIO ALARM OFF button,
and turn the control knob until the desired period appears in
the OXYGEN SATURATION display. Release the button. This
period can be set for any value between 30 and 120 seconds.
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