Mindray WATO EX-55, Service Manual

Page: 41 / 322

3-5
3.4.2 With O2 Sensor
Do as described in
3.9.2Test the O2 Concentration Monitoring and Alarms
before testing.To
do the flow control system tests:
1. Connect the pipeline supplies or slowly open the cylinder valves.
2. Turn all flow controls fully clockwise (minimum flow).
3. Set the system switch to the position.
4. Set the flow controls to mid range. Check that the flowtube float moves smoothly and
that the electronic flowmeter displays normally.
5. Test the Link system with N2O flow increasing:
a.Turn the O2 and N2O flow controls fully clockwise (minimum flow).
b.Turn the N2O flow control only.
c.Increase the N2O flow gradually and the O2 flow should increase accordingly. The
measured O2 concentration must be
≥ 25% through the full range.
6. Test the Link system with O2 flow decreasing:
a.Set the N2O flow to 9.0 L/min.
b.Set the O2 flow to more than 3 L/min.
c.Slowly turn the O2 flow control clockwise and the N2O flow should decrease
accordingly. The measured O2 concentration must be
≥ 25% through the full range.
7. Turn all the flow controls fully clockwise (minimum flow).
8. Disconnect the pipeline supply or close the cylinder valve.
3.5 Vaporizer Back Pressure Test
WARNING
z
Use only the Selectatec series vaporizers. Make sure that the vaporizers are locked
when doing the test.
z
During the test, the anesthetic agent comes out of the fresh gas outlet. Use a safe
and approved procedure to remove and collect the agent.
z
To prevent damage, turn the flow controls fully clockwise (minimum flow or OFF)
before using the system.