(Model J) Page 125
17.17 Soak Test
After a complete calibration the ventilator should be soaked tested for 50 hours.
This is to ensure normal operation. The soak test is divide into to halves, 25 hours
in HFO mode and 25 hours in CMV with the battery life verification test in
between.
Connect gas to the ventilator. The soak test can be carried out with air connected
to the oxygen inlet but a dummy 100% O
2
cell will need to be fitted. (This device is
available from SLE on request, part number: L0291).
Connect a full patient circuit with test lung.
Carry out a 100% oxygen calibration (One point) with the dummy 100% O
2
cell.
17.17.1 HFO Soak test. Part 1 of 3
Set the ventilator up in HFO mode,
Set HFO rate to 5 Hz
Mean to 10 mbar
Delta p set to achieve 60 mbar
FiO
2
set to 96%
Run for a minimum of 25 hours.
After 25 hours of HFO soak, check the delta p and the mean are within 10% of
initial values.
17.17.2 Battery Life Verification. Part 2 of 3
After the battery has been fully charged (from the soak test), disconnect the
mains supply.
Leave the ventilator set to the HFO soak test settings.
Ensure the ”Main Power Fail” alarm is active.
Ensure that the ventilator runs for a minimum of 30 minutes before the “Battery
low alarm” is activated.
Ensure that the ventilator continues operation on battery for a further 15 minutes
(minimum) after the battery low alarm first occurred.
Check list Item 14.
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