Figure 3-8: Alarm Volume Display - Nellcor NPB-190 Service Manual

3.3.3.1.2 Alarm Volume Control
3.3.3.1.3 Pulse Tone Volume Control
3.3.3.1.4 Dynamic Operating Range
After completing the procedure in paragraph 3.3.3.1.1:
1. Press and hold the Alarm Silence button for more than 3 seconds. Verify the
following:
a. "OFF" is displayed for approximately 3 seconds.
b. After 3 seconds, a steady tone is heard at the default alarm volume
setting, the %SpO
indicates the default setting of 5.

Figure 3-8: Alarm Volume Display

2. Press the Adjust Down button until an alarm volume setting of 1 is
displayed. Verify that the volume of the alarm has decreased but is still
audible.
3. Press the Adjust Up button to increase the alarm volume setting to a
maximum value of 10. Verify that the volume increases. Press the Adjust
Down button until a comfortable audio level is attained.
4. Release the Alarm Silence button. The tone stops.
1. When a valid pulse has been acquired, press the Adjust Up button and
verify that the beeping pulse tone sound level increases.
2. Press the Adjust Down button and verify that the beeping pulse tone
decreases until it is no longer audible. Press the Adjust Up button to return
the beep volume to a comfortable level.
The following test sequence verifies proper monitor operation over a range of
input signals:
1. Connect the SRC-2 to the NPB-190 and turn the NPB-190 on.
2. Place the SRC-2 in the RCAL 63/LOCAL mode.
3. Set the SRC-2 as indicated in Table 3-1. Verify that the NPB-190 readings
are within the indicated tolerances. Allow the monitor several seconds to
stabilize the readings.
Note: A (*) indicates values that produce an alarm. Press the Alarm Silence
button to silence the alarm.
Section 3: Performance Verification
display indicates "VOL", and the pulse rate display
2
3-7