Philips M3000A, Service Manual

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Preventive Maintenance Tests
146 Testing the Instrument
Preventive Maintenance Tests
Preventive Maintenance refers specifically to the series of tests required to make sure the
Instrument measurement results are accurate. When authorized Philips personnel service the
Instrument, they will report these results back to Philips. The collected data forms a database
to be used in product development. The measurements requiring these reported tests are NBP
and sidestream CO
2
. It is not necessary, however, for hospital personnel to report these
results.
NBP Accuracy, Leakage, Linearity and Valve Test
NBP Accuracy Test
This test checks the performance of the non-invasive blood pressure parameter. The NBP
accuracy test is required once every two years and when the Instrument is repaired or when
Instrument parts are replaced.
Connect the equipment as shown in the following:
Tools required
• Reference manometer (includes hand pump and valve), accuracy 0.2% of reading.
• Expansion chamber (volume 250 ml +/- 10%). (Or alternatively, an NBP cuff can be used.
When using a cuff, take care not to move it or touch it during the procedure as this can
cause the calibration to fail.)
• Appropriate tubing.
NOTE In Service Mode, the systolic and diastolic readings indicate the noise of NBP channels one
and two respectively. When static pressure is applied, the reading in NBP channel 1 should be
below 50. The value in parentheses indicates the actual pressure applied to the system.
Step 1 Connect the manometer and the pump with tubing to the NBP connector on the
Measurement Server and to the expansion chamber.
Step 2 Go to Service Mode.
Step 3 Select the NBP setup.
Expansion Chamber
Manometer
To NBP Input
Tubing