7100 Anesthesia Ventilator
4-34
02/03 1006-0836-000
4.10.10
Test Inspiratory Valve
This test only checks the control circuit for the Inspiratory Valve. Since it does
not look at the output of the Inspiratory Valve, you do not have to have an active
drive gas supply.
To
Test the Inspiratory Valve
the software opens the inspiratory valve in
increments until the flow valve is completely open.
•
At each of the settings of the inspiratory valve the A/D channel for
Flow DAC Feedback is recorded.
•
If the A/D for the Flow DAC Feedback is not within the correct
tolerance the test fails.
Remarks
A failure can be caused either by the control circuit or a flow valve malfunction.
To check the control circuit,
1. Go to the “Valves - Test Tool” menu.
2. Set the Inspiratory Valve to 0.25 L/min. The “Flow Valve Volt” reading
should increase slightly.
3. If the reading jumps high (~ 6 Volts), the control circuit for the Inspiratory
Valve is open or the Inspiratory Valve is defective.
4. Measure the resistance between the leads at the unplugged Inspiratory
Valve connector. A multimeter should read 1.5 ±0.15 ohms.
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