Mallinckrodt NELLCOR NPB-4000, Service Manual

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Section 3: Performance Verification
3-10
3.3.4.4 Verification of Pneumatic System
Tests in paragraphs 3.3.4.4.1 through 3.3.4.4.5 verify the functionality of the
NPB-4000/C pneumatic system. These tests are designed to use the Bio-Tek
“BP Pump” noninvasive blood pressure simulator. The internal test volume of
the Bio-Tek simulator is 250 cm
3
, which is used to calculated the
inflation/deflation rate periods. The Bio-Tek simulator or any equivalent NIBP
simulator is required to perform these tests.
The NPB-4000/C must be placed in Diagnostic Mode, with the NIBP Test screen
active for each of the NIBP tests. For a detailed explanation of the Diagnostic
Mode, refer to Section 4,
Power-up Defaults Menu and Diagnostic Mode .
Each of the tests described in paragraphs 3.3.4.4.1 through 3.3.4.4.5 must be
performed to verify pneumatic system functionality. These tests can be
performed individually (in any order) or sequentially. Prior to performing any of
these tests, perform the following setup procedure. If these tests are performed
in sequence, this procedure needs to be performed once prior to the first test.
1. Turn on Bio-Tek simulator and press MODE button to place simulator in
test mode. Simulator screen will indicate “Internal Cuff” and “Pressure
Gauge”.
2. Connect simulator hose to NIBP connector on NPB-4000/C.
3. Follow procedure described in Section 4 to place NPB-4000/C in Diagnostic
Mode with NIBP Test screen active.
3.3.4.4.1 Pressure Transducer Accuracy
The pressure transducer accuracy test verifies the pressure accuracy of the
NBP-4000/C pressure transducer.
1. Ensure Bio-Tek simulator is in test mode. 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 Alarm Silence switch on NPB-4000/C to ensure 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 the simulator.