Mallinckrodt NELLCOR NPB-4000, Service Manual

Page: 26 / 219

Section 3: Performance Verification
3-14
3.3.4.4.5 Over-pressure
The over-pressure test verifies the functionality of the over-pressure relief
system of the NPB-4000/C.
1. Ensure Bio-Tek simulator is in test mode. The simulator should display
“Pressure Gauge”.
2. Ensure simulator is set up for internal cuff.
3. Ensure NIBP Test screen is active on NPB-4000/C.
4. Press Heart Rate Tone Volume switch on NPB-4000/C to ensure both
valves are closed.
5. Perform offset adjustment so simulator and NBP-4000/C both display a
pressure of 0 mmHg.
a. Press Contrast Adjust switch on NPB-4000/C,
b. Press Zero button on simulator, to
6. Press Select button on simulator until simulator displays “Overpressure
Test”.
7. Press Start Test button on simulator.
Note: The simulator will pressurize the system until the monitor’s over-pressure
relief system activates. The simulator will display the pressure value that
caused the NPB-4000/C over-pressure relief system to activate. The test
will have been successfully completed if the simulator displays a pressure
reading of 280 mmHg to 330 mmHg.
8. Press and hold Heart Rate Tone Volume switch to ensure NPB-4000/C
displays a pressure of 0 mmHg.
Note: Additional NIBP tests may be performed at this time. If no further NIBP
tests are to be conducted, turn the NPB-4000/C off. Normal monitoring
operation will return the next time the monitor is turned on.
3.3.4.5 Operation with a Temperature Simulator
1. With monitor off, connect temperature cable (supplied with the temperature
simulator) to appropriate connector on temperature simulator.
2. Connect temperature cable to temperature input port on NPB-4000/C.
3. Set temperature simulator as follows:
Temperature:
37
°
C (98.6
°
F)
Probe type: YSI 400 series