Section 3
Daily Checkout
D. Check for moisture accumulation in the breathing and
scavenger hoses. Remove any moisture found.
E. Verify the safe performance of the open reservoir
scavenging system. With the scavenging system properly
installed and operating, test for positive and negative
pressure relief.
To test for negative pressure relief:
F. Connect a vacuum hose to the DISS threaded terminal on
the left-hand side of the scavenger (or attach a wall
suction hose onto the adapter’s hose-barb fitting).
G. Short-circuit the absorber’s inspiratory and expiratory
valves with a 22 mm breathing hose.
H. Set the absorber’s manual/automatic selector valve to BAG.
I. Turn the APL valve control knob fully counterclockwise.
J. Verify that the suction waste gas disposal system is active.
K. Adjust the scavenger needle valve to a flowmeter
indication between the two white lines.
L. Close all flow control valves on the anesthesia system.
M. Occlude the absorber breathing bag terminal and observe
the breathing pressure gauge on the absorber. The gauge
should indicate only a negligible negative pressure (no
lower than -0.5 cmH
2
O).
To test for positive pressure relief:
N. Perform steps A through E.
O. If the system is equipped with a PEEP valve, turn the
PEEP valve control knob fully counterclockwise to its
lowest setting.
P. Adjust the scavenger needle valve to a completely closed
position by turning it fully clockwise.
Q. Open the oxygen flow control valve to a flow of 10 l/min
and occlude the absorber breathing bag terminal.
3-9
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