Functional Tests Periodic Maintenance
6 - 26 0070-10-0683 AS3000™ Service Manual
6.8.6 Breathing System Checks
6.8.6.1 Waste Gas Scavenger Test (if available)
1. Connect one end of the low pressure waste gas hose to the port on the Waste Gas
Scavenger Assembly. Connect the other end of the hose to the EVAC port.
NOTE: If operating the AS3000 with other types of waste gas
scavenging, ensure that waste gases are directed from the
EVAC port to that scavenging system.
2. Connect the respiratory gas monitor exhaust output to the barbed fitting port on the
Waste Gas Scavenger Assembly.
3. Cap any open ports on the waste gas scavenger assembly.
4. Ensure that the waste gas scavenger flow adjustment is able to be set throughout its full
range.
6.8.6.2 Internal Gas Connections Test
1. Close and remove all gas cylinders from the AS3000
2. Connect only the AIR line pressure hose to the AS3000 from the wall supply. Leave all
other line pressure hoses disconnected.
3. With the AS3000 powered OFF, rotate the AIR flow control knob to ensure a
continuous flow increase throughout its full range
4. Disconnect the AIR line pressure hose from the AS3000, and connect the O
2
line
pressure hose from the wall supply.
5. Fully rotate the N
2
O flow control knob and verify that there is no flow.
6. Fully rotate the AIR flow control knob and verify that there is no flow.
6.8.6.3 Drive Gas Pressure Loss Alarm, N
2
O Cutoff Test
1. Set the O
2
flow to 2 L/min using the flow control valve.
2. Set the N
2
O flow to 2 L/min using the flow control valve.
3. Set the AIR flow to 2 L/min using the flow control valve.
4. Interrupt the O
2
supply to the AS3000.
5. Verify that the flow of N
2
O and O
2
stops within 2 minutes and that the flow of AIR (if
available) continues to flow at 2 L/min.
6. Verify the following alarms are activated:
• O
2
Supply Failure appears on the screen
• An alarm tone sounds.
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