26
Using the 9847 Pulse Oximeter
Audible Breath Beep
When the detected CO
2
increases (during exhalation) by approximately 5 mmHg, a breath is detected
and the audible breath beep will sound. One beep is sounded for each breath detected. The breath beeps
will only sound during the quiet part of an alarm burst sequence.
The “variable pitch” (fixed pitch “off”) breath beep is the default setting at setup. During variable pitch
breath beeps, the tone of the breath beeps is indexed to the number of bars illuminated on the CO
2
bar
graph. The more bars lit, the higher the pitch. In variable pitch mode, breath beeps will sound at
inspiration (on the falling edge of the CO
2
waveform).
However, if desired the “fixed pitch” breath beep (fixed pitch “on”) can be selected at setup. The “fixed
pitch” breath beep has a pitch higher than the highest bar graph-indexed pitch. In fixed pitch mode,
breath beeps will sound during exhalation (on the rising edge of the CO
2
waveform). During power on
initialization and when changing the breath beep sound volume, beeps will sound as fixed pitch.
Each time the 9847 is turned on, the audible breath beep will default to the medium sound volume setting.
During normal operation, pressing the advance switch cycles the audible breath beep sound volume
between low, medium, high, and off. A “volume” beep will sound each time the advance switch is pressed
to indicate the current setting, unless an audible alarm is in progress.
NOTE:
The advance switch will not alter the volume of the medium and high priority audible
alarms.
Pulse oximeter sensor
disconnect, dislodgment, or
pulse oximeter sensor failure
Medium priority alarm
until valid signal again
detected, unless
audible high priority
patient alarm is latched
• Display “dash” sign in leftmost SpO
2
digit and freeze numeric displays for
10 seconds
• Display dashes in middle digit of SpO
2
and pulse rate displays 10 seconds
after first dash
• Corresponding dashes will blink if prior
high priority pulse oximeter patient
alarms are latched
CO
2
sensor reduced signal due
to:
• CO
2
sensor disconnection
or
• Malfunction or
• Blocked light path or
• Airway adapter tube
removed from the CO
2
sensor
Medium priority alarm
until valid signal again
detected, unless
audible high priority
patient alarm is latched
• Third and sixth bars of CO
2
display
steadily illuminated
• Latched prior no breath indicator
blinking
a.Note that if a critical battery condition occurs while the audible alarms are disabled, the audible alarms will become re-
enabled. A medium priority alarm will sound unless there is a high priority alarm condition in effect.
Table 4: Audible and Visible Functions During Alarm Conditions (Continued)
Alarm Condition
Audible Indication
Visible Indication