b. After you have made all the checks listed above, perform the appropriate leak
test procedure again.
(1) If the circuit meets all leak test procedure specifications, the apparatus
may be used.
(2) If the circuit cannot meet the specifications, you must repair the circuit
before returning the anesthetic device to service.
Applying a soap solution to suspected joints while the circuit is under
pressure may reveal the leak.
ISOLATE A SCAVENGING VALVE MALFUNCTION
Refer to figure 3-2. When you are performing the last step of leak test number
3B (release the breathing bag nipple and adjust the oxygen flow to 500 cc/minute), the
breathing circuit gauge may exceed 3 mm Hg. This indicates that the scavenging valve
is not opening properly. You must repair or replace it before returning the anesthetic
device to service.