Tests 3 Testing and Maintenance
37
1
Connect the manometer and the pump with tubing to the NBP connector on the MMS and to the
expansion chamber.
2 In service mode, select the Setup NBP menu.
3 Select Close Valves: On
4 Raise the pressure to 280 mmHg with the manometer pump.
5 Wait 10 seconds for the measurement to stabilize.
6 Compare the manometer values with the displayed values.
7 Document the value displayed by the monitor (x1).
8 If the difference between the manometer and displayed values is greater than 3 mmHg, calibrate
the MMS. If not, proceed to the leakage test.
9 To calibrate the MMS, select Close Valves off then Calibrate NBP and wait for the
instrument to pump up the expansion chamber.Wait a few seconds after pumping stops until
EnterPrVal is highlighted and then move the cursor to the value shown on the manometer. If
one of the following prompt messages appears during this step, check whether there is leakage in
the setup:
– NBP unable to calibrate–cannot adjust pressure
– NBP unable to calibrate–unstable signal
10 Press Confirm.
If the INOP NBP Equipment Malfunction message occurs in monitoring mode, go back to service
mode and repeat the calibration procedure.
NBP Leakage Test
The NBP leakage test checks the integrity of the system and of the valve. It is required once per year
and when you repair the monitor or replace parts.
1 If you have calibrated, repeat steps 2 to 6 from the accuracy test procedure so that you have 280
mmHg pressure on the expansion chamber.
2 Watch the pressure value for 60 seconds.
3 Calculate and document the leakage test value (x2).
x2 = P1 - P2
where P1 is the pressure at the beginning of the leakage test and P2 is the pressure displayed after
60 seconds.
The leakage test value should be less than 6 mmHg.
NBP Linearity Test
1 Reduce the manometer pressure to 150 mmHg.
2 Wait 10 seconds for the measurement to stabilize.
3 After these 10 seconds, compare the manometer value with the displayed value.
4 Document the value displayed by the monitor (x3)
5 If the difference is greater than 3 mmHg, calibrate the MMS (see steps 9 to 10 in the accuracy test
procedure).
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