
Start-Up and Use
ALARMS
Description of Alarms
The NPB-290 has three levels of audible alarms.
1. High-priority alarm: Indicated by a fast-rate, high-pitched,
pulsing tone. A high-priority alarm sounds after loss-of-
pulse is detected.
Refer to the “Management of the Loss-of-Pulse Alarm”
paragraph later in this section for a detailed description of the
loss-of-pulse alarm.
2. Medium-priority alarm: Indicated by a medium-rate,
medium-pitched, pulsing tone. A medium-priority alarm
sounds when any measured patient parameter (%SpO
2 or
Pulse Rate) moves outside the set alarm limits.
During a medium-priority alarm, the yellow display turns red
and flashes with the patient parameter that violated the limit
(%SpO
2 or Pulse Rate).
3. Low-priority alarm: Indicated by a slow-rate, low-pitched,
pulsing tone. A low-priority alarm sounds during the
following conditions:
• low battery (while operating on battery power)
• when an SpO
2 cable has disconnected
• monitor failure
• 50 seconds after loss of pulse is detected in the
presence of continuous motion
• During a low battery alarm, the Low Battery
indicator illuminates and the alarm tone sounds
immediately, even if the alarms are silenced or set to
OFF.
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