Medical Ventilator Service mode check

To identify possible malfunctions displayed as a result of the system test, the following sequence should be used to verify proper gas supply and operation of the inspiratory and expiratory valves.

1. Ensure proper O2, AIR and line supplies are connected beforeturning ON the system.

2. Wait for the power-up test to complete, then start the servicemode according to 4.3.

3. Connect the inspiratory and expiratory ports with one tube.

4. Verify proper AIR flow function by selecting “AIR” and “x 10” andincreasing the flow by use of the com wheel.

5. Use the com wheel to verify that the AIR flow can be returned tozero.

6. Verify proper O2 flow function by selecting “O2 ” and “x 10” andincreasing the flow by use of the com wheel.

7. Use the com wheel to verify that the O2 flow can be returned tozero.

8. Verify proper expiratory flow function by comparing the datadisplayed with the set O2 flow.

9. Remove the tube from the expiratory port and seal the open endof the tube with the 22 mm sealer.

10. Select “AIR”, “x 1” and adjust the com wheel for an AIR flow of20 L/Min.

11. Verify that the pressure limiting function of the over pressurerelief valve is properly limiting “Pat.pressure” at 75 ± 2 mbar.

12. Verify proper O2 concentration while changing Air and O2 flows.