A5/A3â„¢ Service Manual 046-001141-00 3 - 19
Periodic Maintenance Functional Tests
FIGURE 3-18 Data Monitors Menu
4. The second column is the current reading of the sensors and the third column is the zero that is
saved in the EEPROM.
The following table lists the normal range of the zero point of the A5/A3 pressure and flow sensors.
• If there is a great deviation(> 200 AD Counts) between the current zero point and the saved zero
point, it indicates that the sensor is aging but it does not mean that normal measurement cannot
be performed. The sensor will need to be recalibrated.
If the zero point of the flow sensor is not within 0 to 2000 and the zero point of the pressure
sensor is not within 0 to 1200, the Ventilator Control Board needs to be replaced.
3.8.6 Check the Flow Sensor Accuracy
NOTE: You can use any flow meter that has an accuracy of at least ±2% for the
accuracy measurement of the flow sensors.
NOTE: Set the Gas Flow Analyzer Correction Mode to ambient temperature
and pressure.
Sensor Name Normal Range of Zero Point (AD Counts)
Paw sensor 200~800
PEEP pressure sensor 200~800
Inspiratory flow sensor 200~1400
Expiratory flow sensor 200~1400
Ventilator internal flow sensor 100~400
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