Alarm Functions - Nellcor N-200 Operator's Manual

Guide to Operation
The pitch of the warbling tone is also significantly higher than
any beep that reflects oxygen saturation.
Changing Pulse Tone Volume
Turn the control knob to adjust pulse tone volume. When the
N-200 is turned off and back on again, the pulse tone returns to
its default volume.

Alarm Functions

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.
Audio and visual alarms can be set for high and low oxygen
saturation, high and low pulse rate, loss of pulse, and visual
alarm for loss of ECG. Audio alarms are interrupted briefly for
detected pulses and the volume is adjustable. Audio alarms can
be disabled for a 60-second period by pressing the AUDIO
ALARM OFF button; the disable period is adjustable between
30–120 seconds, or disabled indefinitely by setting the alarm
silence period to OFF. The alarm silence indicator blinks
continuously when the audible alarm has been disabled.
Alarm States
If the oxygen saturation level or pulse rate moves beyond the
alarm limits, the corresponding alarm indicator flashes, the
appropriate display flashes, and an audio alarm sounds (unless
or until it has been silenced).
If the alarms activate because the pulse signal is lost, the
OXYGEN SATURATION and PULSE RATE displays flash 0,
the PULSE SEARCH indicator flashes, and an audio alarm
sounds (unless or until it has been silenced). If C-LOCK ECG
synchronization is in use and an ECG signal can still be
detected, PULSE RATE continues to be displayed.
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