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Flow control test
WARNING
WARNING
2076152-001
Note
The Link-25 system is tested during the "Gas controls" part of the
checkout procedure. This procedure is an alternate manual test for
significant malfunction of the Link-25 system.
This procedure tests for significant malfunction of the
Link-25 system. It does not confirm the proper calibration
of the Link-25 system. Perform periodic calibrations using
an accurate and properly calibrated O2 monitor as
recommended in the "Circuit O2 cell" procedure in the
"User maintenance" section.
1.
Connect the pipeline supplies or slowly open the cylinder valves.
2.
Turn all flow controls fully clockwise for minimal flow.
3.
(ACGO option only.) Set the ACGO switch to circle circuit
position.
4.
(Aux O2+Air only.) Set the Aux O2+Air switch to circle circuit
position.
5.
Set the system to On.
Note
Do not use the system if the Low battery or any ventilator failures
occur.
Keep the Link-25 system engaged. Adjust only the test
control for the following steps.
•
Test N2O first and then O2.
•
The O2 cell must be correctly calibrated.
6.
Test the Link-25 system by increasing the N2O flow.
•
Slowly turn the N2O flow control counterclockwise.
•
Increase the N2O flow as specified in the following table
and make sure the O2 flow is as specified.
N2O flow l/min
0.8
2
4
10
7.
Test the Link-25 system with O2 flow decreasing.
•
Set the N2O flow to 9 l/min.
9 User maintenance
O2 flow greater than l/min
0.2
0.5
1.0
2.5
9-9
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