2: Maintenance NBP Module Tests
22
NBP Calibration Failure
If the error message “NBP Calibration failed: <reason for the failure>. Check that the pressure applied
is correct. Please restart calibration.” appears at any moment during NBP calibration, then:
1 Recheck the manometer and cuff assembly connections.
2 Loosen the cuff. If less than ten pump compressions fill the cuff, then it is too tight.
3 Press the Main Service soft key.
4 Select
from the Service Main Menu.
5 Restart the “NBP Calibration Procedure” on page 20, making sure that the applied pressures are
correct.
6 If you cannot successfully complete the calibration, then write down the reason for the failure from
the error message and call the Response Center. See “Calling for Service” on page 68.
NBP Module Tests
Perform NBP module tests only if there is an uncertainty about the module performance.
Each of the procedures assumes the device, the manometer, and the cuff assembly are still set up as they
were at the end of the previous test.
If all results are as described, the device passes that portion of the test. Return to the Service Mode Main
menu by pressing the Main Service soft key.
If there is any failure, begin troubleshooting and repairing the device as needed. See “Troubleshooting”
on page 29.
Accuracy Test
To test the NBP module accuracy:
1 Connect the NBP tubing to the NBP port on the defibrillator/monitor, and connect the test
manometer and cuff to the tubing. See Figure 16 “NBP Calibration Setup” on page 20.
2 Pressurize the cuff to approximately 250 mmHg.
3 Wait for 30 seconds to allow the pressure in the unit to equalize.
4 When the pressure stabilizes, compare the displayed pressure reading to the pressure indicated by the
manometer.
5 If the difference between the manometer and the displayed pressure is more than 2 mmHg, calibrate
the NBP module as described in “NBP Module Calibration” on page 19 and repeat the test.
6 Release the pressure in the cuff before proceeding to the next test to avoid the safety timeout.
Leakage Test
To test the NBP module for leaks:
1 Pressurize the cuff to approximately 250 mmHg.
2 Wait for 30 seconds to allow the pressure in the unit to equalize.
3 Watch the displayed pressure for 60 seconds.
4 Record the pressure drop at the end of 60 seconds.
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