Mallinckrodt NELLCOR NPB-4000 Service Manual page 25

Patient monitor
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3.3.4.4.4 Deflation Rate
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 deflation rate test verifies the deflation 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 that both
valves are closed.
5.
Perform offset adjustment so that 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 and hold NIBP Start/Stop switch on NPB-4000/C to activate pump.
7.
Hold NIBP Start/Stop switch until NPB-4000/C displays a pressure of 280
mmHg.
8.
Start 1 minute timer, and simultaneously press and hold Alarm Silence
switch on NPB-4000/C.
Note: This will cause the pneumatic system to deflate at a rate of 3 mmHg/sec
±1.5 mmHg/sec.
9.
After 1 minute, record pressure displayed on the NPB-4000/C.
Note: The test will have been successfully completed if the NPB-4000/C
displays a pressure reading of 10 mmHg to 190 mmHg.
10. 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.
Section 3: Performance Verification
3-13

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