Datex-Ohmeda 7100, Техническое справочное руководство

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4 Tests and Calibration
1006-0836-000 02/03 4-17
4.9.5
PEEP Valve Calibration
The PEEP Valve Calibration should be performed:
• when the machine is first put into service.
• at prescribed, planned maintenance intervals.
• after the pneumatic engine has been serviced.
Calibration setup
After completing the “Airway Sensor Span” calibration in the previous section,
remove the pressure sensing tee and connect the open end of the patient
circuit tube directly to the inspiratory flow patient connection.
• If you are only performing the PEEP Valve calibration, connect the
Calibrated Flow Orifice as detailed in the “Airway Sensor Span” setup.
Then, connect the open end of the patient circuit tube directly to the
inspiratory flow patient connection.
Calibration procedure
1. To enter the calibration menu, select “Next PEEP Valve Cal Menu”.
2. Establish drive gas for the ventilator.
3. Set all flow controls to minimum.
4. To start calibration, select “Start PEEP Valve Calibration”.
Note: This calibration procedure may take up to 20 minutes.
The calibration status and progression bar are displayed at the bottom of the
screen.
If the calibration fails, the screen will display the reason for the failure.
(Ensure that the test tubing is leak free.)
Remarks
The calibration routine opens the PEEP valve stepwise and reads the resulting
airway pressure. The accumulated values represent the output linearity curve
for this particular PEEP valve. The accumulated data include:
• Lower PEEP Valve Curve
• Upper PEEP Valve Curve
• PEEP Temperature Comp
• PEEP Nominal Resistance
The data is stored in EEPROM and is used during normal operation to
compensate for the individual valves output characteristics.
Scroll Data
To view the stored data, select “Scroll Data”.
Real-Time
Value