Maintenance and Calibration
63
4
Verify APL Valve accuracy.
a
Attach a breathing circuit the patient module.
b
Connect the y-piece to the hose end where the reservoir bag normally is connected.
c
Set a fresh gas flow of 5 l/min.
d
Set the APL valve to each pressure graduation (10, 20, 30, 40 and 50 Pa x 100 (mbar;
cmH
2
O))
e
Compare the valves on the pressure gauge with the valve settings. Deviations from pressure
indication and setting must not exceed ±20% of the set value or 10 Pa x 100 (10 mbar; 10
cmH
2
O), whichever is greater.
4.3.4.2 Alarm Tests
1
Turn on the Narkomat
+
and ensure adequate driving gas is present.
2
Perform the Compliance test.
3
Verify the
Vt
min (low alarm), Peak pressure (high and low alarms), M.Vol (low alarm) and O
2
(high
and low alarms).
a
Ventilate a test lung in the CMV mode.
b
Set each parameter’s alarm limit one at a time, to violate it’s high and low alarm setting.
c
Verify that alarm indications function.
Fig. 19 Alarm screen
