4a Tests and Calibration 4.X Software
4a-30
05/04 1006-0453-000
4a.3.20 Calibrate Flow
Sensors
The software calibrates the inspiratory flow, expiratory flow, airway pressure
and manifold pressure transducers for zero flow/pressure offset voltage. It
does so by reading the A/D values for inspiratory flow, expiratory flow, airway
pressure and manifold pressure when the flow sensor module has been
disconnected from the bulkhead connector. If the A/D values are not within
the correct tolerance, the calibration fails. If the calibration passes, the offset
A/D values at which the inspiratory flow, expiratory flow, airway pressure and
manifold pressure transducers were calibrated at, are stored in the EEPROM.
Figure 4-32 • Calibrate Flow Sensors menu
Remarks
Fail - indicates a problem with the SIB.
Inspect the Bulkhead Connector and SIB tubing for moisture or possible
occlusion.
Check for bad differential pressure transducer.
• Ensure that the flow sensor module is disconnected from the bulkhead
panel.
• Check the transducer outputs using the Display A/D menu.
• If the transducer is out of tolerance (Refer to Table 4a-1, on page 4-23),
replace the SIB assembly.
Summary of Contents for Aestiva 7900 SmartVent
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