6-8
îš‹ Make sure that the N
2
O flow decreases. The measured O
2
concentration must be
≥21% through the full range.
8. Disconnect the O
2
pipeline supply or close the O
2
cylinder valve.
9. Make sure that:
îš‹ N
2
O and O
2
flows stop. The O
2
flow stops last.
îš‹ Air flow continues if Air supply is available.
îš‹ Gas supply alarms occur on the ventilator.
10. Turn all the flow controls fully clockwise (minimum flow).
11. Reconnect the O
2
pipeline supply or open the O
2
cylinder valve.
12. Set the system to Standby.
6.7 Vaporizer Back Pressure Test
WARNING
z Use the Selectatec series vaporizers only. Make sure that the vaporizers are locked
when doing the test.
z During the test, the anesthetic agent comes out of the fresh gas outlet. Use a safe
and approved procedure to remove and collect the agent.
z To prevent damage, turn the flow controls fully clockwise (minimum flow or OFF)
before using the system.
Before the test, make sure that the vaporizers are correctly installed. For details about
vaporizer installation, refer to 13.4 Install the Vaporizer.
1. Connect the O
2
pipeline supply or open the O
2
cylinder valve.
2. Turn the O
2
flow control and set the O
2
flow to 6 L/min.
3. Make sure that the O
2
flow stays constant.
4. Adjust the vaporizer concentration from 0 to 1%. Make sure that the O
2
flow must not
decrease more than 1 L/min through the full range. Otherwise, install a different
vaporizer and try this step again. If the problem persists, the malfunction is in the
anesthesia system. Do not use this system.
5. Test each vaporizer as per the steps above.
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