(e) Close the cylinder valves.
(f)
Observe the pressure on each gauge.
(g) For gas supplied from small cylinders, verify that the pressure
shown on each gauge does not drop more than 100 psig per 5-minute period. If the
pressure drops at a faster rate, a significant leak exists at some point within the circuit
from the cylinder valve to the disconnected end of the supply hose. If a significant leak
exists, isolate and repair the malfunction. (Refer to Lesson 3, Isolate Malfunctions to
Component Level in Anesthesia Apparatus, and Lesson 4, Remove and Replace or
Repair Defective Components of Anesthesia Apparatus.)
(h) For gas supplied from large cylinders, verify that the pressure
shown on each gauge does not drop more than 100 psig per 7-minute period. If the
pressure drops at a faster rate, a significant leak exists at some point within the circuit
from the cylinder valve to the disconnected end of the supply hose. If a significant leak
exists, isolate and repair the malfunction.
(i)
Remove the protective closure devices from the supply hoses.
(2) Leak test procedure number 2. Perform Leak Test Procedure Number 2
to determine that the flow meters are functioning properly.
(a) Connect the supply hoses to the regulator assembly outlets and the
control head inlets.
(b) Close all three flow control valves to their stops.
(c)
Open the cylinder valves to the pressurized circuit.
(d) Close the cylinder valves. No flow should be indicated on the four
flow meters.
(e) Verify that the flow meter indicates no flow. If the flow meter
indicates a flow, isolate and repair the malfunction.
(3) Leak test procedure number 3A. Perform leak test procedure number
3A on the adult re-breathing circuit to determine that there are no significant leaks in the
circuit.
(a) Remove the three-liter bag from the lower exhalation check valve
nipple.
(b) Insert a protective closure device in place of the breathing bag on
the lower exhalation check valve nipple.
MD0353
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