Datex-Ohmeda S/5 M-NIBP, Technical Reference Manual Slot

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NIBP Module, M-NIBP
Document No. 800 1015-1
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3.4 Adjustments and calibrations
3.4.1 Pressure safety level detection “OFFSET”
Remove two screws at the rear of the module. Remove the module box. Connect first the service
cable (e.g. a long Gas interface cable) to the module connector inside the monitor frame and then
to the rear connector of the module. Switch the monitor on. Go to the NIBP service menu and select
Pneumatics . Pump reference pressure into the module:
Rev. 00-03 = 14 mmHg (9...19 mmHg)
Rev. 04 -> = 7.5 mmHg (5...10 mmHg)
Adjust the trimmer until AD5 signal sign changes from negative to positive. Re-check the
adjustement, then lock the trimmer with for example nail polish.
3.4.2 NIBP calibrations
The electronics of NIBP pressure measurement is calibrated at the factory. Zeroing pressure is
automatically maintained by the processor. If the zero point of the pressure transducer drifts more
than specified, an error message is given and the NIBP board should be recalibrated or replaced.
The calibration can be checked and recalibrated in the NIBP service menu.
The calibration of the primary pressure channel can also be checked from the NIBP setup menu
(NIBP, NIBP Setup, Calibration Check). In this case the auto zeroing is performed at start - remove
hose before entering to ensure atmospheric pressure to the pressure transducers - the primary
pressure is displayed. The zero-offset value should then be zero.
Calibration check
1. Enter Calibration menu.
2. Select ‘Calibration Check’ and press the ComWheel.
3. Connect an external precision manometer to the module.
4. Pump the following pressures to manometer and check the difference between the
manometer and monitor pressure display: