Dräger Narkomed 2B Operator's Instruction Manual page 55

APL Valve
Breathing System
Leak Test
*6. Check the APL valve to be sure it can relieve excess gas from the
breathing system into the scavenger system.
To check the APL valve's flow resistance:
A. Set the manual/automatic selector valve to BAG.
B. Remove the bag from the swivel arm bag mount.
C. Interconnect the 22 mm ports of the inspiratory and
expiratory valves with a 22 mm hose.
D. Completely open the APL valve by turning the control
knob fully counterclockwise to its stop position.
E. Turn the SYSTEM POWER switch to ON.
F. Open the oxygen flow control valve to a flow of 8 l/min.
G. Occlude the bag mount opening and watch for a pressure
increase on the breathing system pressure gauge. This
pressure increase must not exceed 3 cmH
7. Perform a breathing and fresh gas delivery system pressure test.
This test detects leaks from the patient breathing system and
fresh gas delivery system.
To perform the test:
A. Close all flow control valves on the anesthesia machine.
B. Turn the SYSTEM POWER switch to the STANDBY posi-
tion.
C. Turn the vaporizers to 0% concentration.
D. Interconnect the 22 mm ports of the inspiratory and
expiratory valves with a 22 mm breathing hose.
E. Set the manual/automatic selector valve to BAG.
F. Close the APL valve by turning the knob fully clockwise to
its stop position.
G. Check that the breathing pressure gauge is on 0.
Section 4
Preuse Checkout
O.
2
4-3