Mindray Datascope AS 3000, Service Manual

Page: 169 / 180

Preoperative Checklist Periodic Maintenance
6 - 42 0070-10-0683 AS3000™ Service Manual
13. Check Unidirectional Valves:
a. Set the Ventilation mode to STANDBY .
b. Set the APL Valve to 20 cmH
2
O
c. Attach a test lung to the Y-fitting of the breathing circuit.
d. Set the AIR flow to 5 L/min.
e. Press the O
2
Flush Valve to fill the breathing bag with volume.
f. Slowly squeeze the breathing bag once every 10 seconds.
g. Verify that the test lung inflates and deflates.
h. Verify that the inspiratory unidirectional valve opens when the test lung inflates.
i. Verify that the expiratory unidirectional valve opens when the test lung deflates.
14. Test drive gas pressure failure system:
a. Set the O
2
, N
2
O, and AIR gas flows to mid-range using the flow control knobs.
b. Close the O
2
gas cylinder using the Tank Wrench.
c. Verify that the O
2
and N
2
O flows fall to zero.
d. Verify that:
• An alarm tone sounds.
• The alarm message O
2
Supply Failure is displayed on the screen.
e. Open the O
2
gas cylinder. Verify that the alarm tone stops and the alarm message is
removed from the screen.
f. Close all gas cylinders.
g. Remove the O
2
cylinder from the AS3000 .
h. Verify that:
• An alarm tone sounds.
• the alarm message O
2
Supply Failure is displayed on the screen.
i. Shut off all flow control valves.
15. High Pressure Leak Test:
a. Connect a breathing circuit and breathing bag to the Breathing System.
b. Set APL Valve to 70 cmH
2
O.
c. Connect the breathing circuit Y-fitting to the test port on the AS3000 .
d. Inflate breathing bag by pressing the O
2
Flush Valve until the pressure gauge
reaches 40 cmH
2
O.
e. Verify that breathing circuit holds pressure for a minimum of 10 seconds.