Mallinckrodt NELLCOR NPB-4000 Service Manual page 17

2. Set SRC-2 as follows:
SWITCH
RATE
LIGHT
MODULATION
RCAL/MODE
3. Press monitor On/Standby switch to turn monitor on.
4. After normal power-up sequence, verify SpO
zero.
Note: The pulse bar may occasionally indicate a step change as the monitor is in
the pulse search mode.
5. Move modulation switch on SRC-2 to LOW.
6. Verify following monitor reaction:
a. Pulse bar begins to track artificial pulse signal from SRC-2.
b. Initially, zero is displayed in SpO
c. After about 10 to 20 seconds, monitor displays saturation and heart rate
as specified by tester. Verify values are within following tolerances:
Oxygen Saturation Range 79% to 83%
Heart Rate Range 35 to 41 bpm
d. Audible alarm sounds and both SpO
will flash, indicating both parameters have violated default alarm
limits.
Note: Heart rate tone source, found in the Heart Rate Menu, should be set
to "SpO ".
2
e. Heart rate tone is heard.
5. Press Alarm Silence switch on monitor front panel. Audible alarm is
temporarily silenced.
Section 3: Performance Verification
POSITION
38
LOW
OFF
RCAL 63/LOCAL
% display initially indicates
2
frame.
2
% and HEART RATE displays
2
3-5