NIBP Calibration Calibration and Performance Verification
2 - 6 0070-10-0604-01 Duo™ Service Manual
2.6 NIBP Calibration
2.6.1 Test Equipment
• NIBP simulator
• NIBP test chamber/dummy cuff
• Manometer with bulb
2.6.2 Test Procedure
2.6.2.1 Transducer Accuracy
1. Connect the 500 cc Test Chamber and calibrated manometer via a ‘‘T’’ fitting to the
NIBP fitting on the Duo monitor under test.
2. Ensure the Duo is not turned on. Simultaneously, press and hold the POWER and NIBP
START/STOP buttons.
When the monitor enters the NIBP Calibration Mode, message code 525 will be
displayed in the Information Codes window. Release the buttons simultaneously.
3. Momentarily press the NIBP START/STOP button to start the NIBP calibration. Vent the
Test Chamber and verify the Duo and the manometer read zero. Using the bulb,
pressurize the test chamber to 50 mmHg and verify the Duo reading agrees with the
manometer +/- 3 mmHg. Using the bulb, increase the pressure to 200 mmHg and verify
the Duo reading agrees with the manometer +/- 3 mmHg.
2.6.2.2 Pneumatic Leak Test
1. Connect the 500 cc test chamber to the NIBP fitting on the Duo monitor under test.
2. From the NIBP Calibration Mode (code 525) momentarily press the CLEAR button on
the Duo keypad. The Duo will then switch to the Pneumatic Test Mode and will display
message code 550 in the Information Codes window.
3. Momentarily press the NIBP START/STOP button to start the leak test. The Duo under
test will automatically pressurize the test chamber to approximately 180 mmHg.
4. After approximately 20 seconds, the Duo under test will vent the pressure in the test
chamber and display a message code E06 (Pass) or E07 (Fail) in the systolic window.
2.6.2.3 Dynamic Repeatability Test
1. Restart unit and allow it to enter normal operating mode.
2. Use polyurethane tubing to connect the Duo monitor to a calibrated NIBP simulator and
the 500 cc test chamber/dummy cuff via a ‘‘T’’ fitting.
3. Select Adult patient size for both the Duo under test and the NIBP simulator.
4. Select a target simulated blood pressure within the ‘‘normal’’ range on the simulator.
5. Take 10 successive NIBP readings and compare the systolic, diastolic, mean and heart
rate readings for consistency. Readings should not deviate more than +/- 5 mmHg for
the NIBP readings and +/- 2 bpm or 2%, whichever is greater for heart rate.
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