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4.4.2 N2O Pipeline Supply Test
NOTE
Remove the N2O cylinder from the yoke before performing this test.
1. Connect the machine to the O2 and N2O supply connectors on the wall via O2 and N2O
supply hoses.
2. Check that the O2 and N2O supply pressure gauges read 280 to 600 kPa.
3. Turn on the system switch.
4. Open the O2 needle valve and adjust flow to 1L/min. Fully open the N2O needle valve.
5. Observe the float of total flowmeter, which should be located at the position between 3L
to 5L.
6. Disconnect the N2O pipeline supply.
7. Make sure that the N2O supply pressure gauge decreases to zero.
4.4.3 Air Pipeline Supply Test
NOTE
Remove the air cylinder from the yoke before performing this test.
1. Connect the machine to the Air supply connector on the wall via Air supply hose.
2. Check that the Air supply pressure gauge reads 280 to 600 kPa.
3. Turn on the system switch.
4. Fully open the Air needle valve.
5. Observe the float of total flowmeter, which should be at the top of the flowmeter.
7. Disconnect the Air pipeline supply.
8. Make that the Air supply pressure gauge decreases to zero.
4.5 Cylinder Supply Tests
All the three needle valves must be closed before the following tests.
4.5.1 O2 Cylinder Supply Test
1. Remove the O2 supply hose from the gas source inlet assembly.
2. Mount the backup cylinder full of O2 on the backup cylinder yoke. If necessary, place a
new clean washer between the cylinder and cylinder yoke to minimize leakage caused
by yoke connections.
3. Keep the O2 cylinder open, before the cylinder pressure gauge displays the pressure of
the cylinder.
4. Turn off O2 cylinder.
5. Ensure that the pressure value displayed on the front panel O2 pressure gauge does not
decrease by less than 10% within one minute.
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