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Performance Verification
Alarm Volume Control
18
6. The N-550B should stabilize on the subject's physiological signal in about
15 to 30 seconds. Verify that the oxygen saturation and pulse rate values
are reasonable for the subject.
1. Press and hold the Alarm Silence button for more than three seconds.
Verify the following:
•
"Alarm Silence Duration Time" is displayed for approximately three
seconds.
•
After three seconds:
•
a steady tone is heard at the default volume setting
•
the %SpO2 display indicates "VOL"
the Pulse Rate display indicates the default setting of "4"
•
2. Press the Adjust Down button, while holding the Alarm Silence
button, until an alarm volume setting of "1" is displayed. Verify that the
alarm volume has decreased but is still audible.
3. Press the Adjust Up button, while holding the Alarm Silence button, to
increase the alarm volume setting to a maximum value of "10." Verify
that the volume increases.
4. Press the Adjust Down button, while holding the Alarm Silence
button, until a comfortable audio level is obtained.
5. Release the Alarm Silence button. The tone stops.
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