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5 Preoperative Tests
M1132382
5-9
Low-pressure leak test
WARNING Do not use a system that has a low-pressure leak.
Anesthetic agent will go into the atmosphere instead of
into the breathing circuit.
Perform either the “Negative low-pressure leak test” or the “Positive
low-pressure leak test” depending on local requirements. It is not
necessary to perform both tests.
Negative low-
pressure leak test
1. Make sure the System switch is set to Standby.
2. Turn off all vaporizers.
3. Turn the ACGO switch to the ACGO position.
4. Compress and release the bulb until all air is removed from the
bulb.
•
Occlude the inlet of the test device. Make sure it is a tight
seal.
• If the bulb of the test device inflates in less than 60 seconds,
use a different test device.
5. Test the system for low-pressure leaks.
• Turn the flow controls one and a half turns counterclockwise.
• Connect the test device to the auxiliary gas outlet.
• Compress and release the bulb until all air is removed from
the bulb.
• The floats will move. If the bulb inflates in 30 seconds or less,
there is a leak in the low-pressure circuit. See
“Pneumatic
problems” in the “Alarms and Troubleshooting” section.
• Disconnect the test device.
6. Test each vaporizer for low-pressure leaks.
• Turn on one vaporizer.
• Set the vaporizer to 1%.
• Perform step 5.
• Repeat this test with each vaporizer.
• If a low-pressure leak occurs while testing any of the
vaporizers, see
“Pneumatic problems” in the “Alarms and
Troubleshooting” section.
• Turn off all vaporizers.
7. Turn all flow controls fully clockwise for minimum flow. Do not
overtighten.