28
Using the 9847 Pulse Oximeter
When a breath is again detected, the audible and visible no breath indicators will stop. The no breath
delay timer is first started when the CO
2
sensor is connected into the 9847 and the system is not in setup
mode (that is, when the lower bar is illuminated on the CO
2
bar graph).
Audible Pulse Oximeter Sensor Alarm
The pulse oximeter sensor alarm is a medium priority equipment audible alarm that sounds when the
pulse oximeter sensor is either disconnected, dislodged, or a pulse oximeter sensor failure occurs. (Also
during this medium priority alarm, visible indicators will occur.) The audible and visible pulse oximeter
sensor alarm indicators will stop when the condition is corrected.
Audible CO
2
Sensor Alarm
The CO
2
sensor alarm is a medium priority equipment audible alarm. Conditions that may cause the
audible equipment alarm include:
• the CO
2
sensor is unplugged,
• the airway adapter tube is removed from the CO
2
sensor,
• the light path is blocked, or
• a CO
2
sensor failure occurs.
Also during this medium priority alarm, a visible indication occurs (a CO
2
sensor fault) where the third
and sixth bars on the CO
2
bar graph will be steadily illuminated (see “CO
2
Bar Graph” on page 23). The
audible and visible CO
2
sensor alarm indicators will stop when the condition is corrected.
Description of Alarm Sounds
The pitch of the alarm sounds is the same as a “volume” beep (the tone heard when changing the breath
beep sound volume).
NOTE:
Audible alarm volumes are fixed. The audible alarms can be disabled, but their volumes
are not user-adjustable.
The sound sequence for the high priority alarm consists of 3 short beeps, a delay, and then 2 more beeps
within a 1 second period; then an identical pattern after a 1 second delay. This sound sequence then
repeats every 10 seconds until the high priority patient alarm condition is cleared.
The sound sequence for the medium priority alarm consists of 3 medium long beeps within a 1 second
period. This sound sequence will repeat every 25 seconds until the medium priority equipment alarm
condition is cleared.
Audible Indicator Sound Control Priorities
Only one audible alarm or informational tone may sound at a time. However, more than one type of alarm
condition may occur at the same time. (For example, a critical battery condition could begin while a no
breath condition is occurring). Therefore, the 9847 software uses a set of “rules” to determine the priority
of these sounds. These sound control rules are described in Table 5.
NOTE:
These priorities assume that the audible alarms have not been temporarily or
“permanently” disabled using the “audible alarm disabled” button.