Theory of Operations
3-10
Service Manual
Third SpO
2
Event
Consider the third event. Suppose the SatSeconds alarm limit is still set to 25.
During this event, the patient’s SpO
2
drops to 75%, which is 10% below the
lower alarm threshold of 85%. Since the patient’s saturation does not return
to a value over the lower alarm threshold within 2.5 seconds, an alarm sounds.
At this level of saturation, the event cannot exceed 2.5 seconds without invok-
ing a SatSeconds alarm.
Figure 3-6.
Third SpO
2
Event: Triggers SatSeconds Alarm
10% drop below the lower alarm limit threshold
x2.5 second duration below the lower threshold
25 SatSeconds
; results in an alarm
Содержание Nellcor GR101704
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Страница 96: ...Operation 6 34 Service Manual a Press an alternate menu option b Press EXIT AND RESTART to exit SERVICE MODE...
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