Mallinckrodt NELLCOR NPB-4000 Service Manual page 24

Section 3: Performance Verification
3.3.4.4.3 Inflation Rate
3-12
7. Allow 15-20 seconds for pressure to stabilize.
8. Record pressure displayed on NPB-4000/C.
9. Initiate a 1-minute timer.
10. After 1 minute, record pressure displayed on NPB-4000/C.
Note: The test will have been successfully completed if the pressure has
dropped by 6 mmHg, or less, during the 1-minute period.
11. Press and hold Heart Rate Tone Volume switch until 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.
The inflation rate test verifies the inflation rate of the NPB-4000/C. A timer/stop
watch is required for this test.
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
6. Simultaneously press and hold NIBP Start/Stop switch on NPB-4000/C to
activate pump, and start the timer.
7. Hold NIBP Start/Stop switch until NPB-4000/C displays a pressure of 280
mmHg., and stop timer.
Note: The test will have been successfully completed if the inflation time is
between 1 and 6 seconds.
8. Press and hold Heart Rate Tone Volume switch until NPB-4000/C displays
a pressure of 0 mmHg.