V4: August 2018
Page 14 of 31
For Review: August 2019
Author: LTV Team/JT
Circuit Calibration
The ventilator will need to have a ‘
learn circuit
’ run on initial set up and for
any additional different circuit type that
may be used i
.e. a separate learn circuit is required for a wet circuit and then a dry circuit. The ‘
learn circuit
’ does not
need to be run at each scheduled circuit change.
It is recommended if both a wet and dry circuit are in use that 2 separate ventilation programmes are set up (see
page 15). A separate ‘
learn circuit
’ can be run for each programme and the ventilator will then remember the test for
the relevant circuit when the programme is selected.
From the Setup Menu, select the Circuit sub-menu. Press start and follow the on-screen prompts.
If ‘
skip
’ is selected, the device will revert to default factory settings.
Follow the on-screen prompts to attach and test the circuit. A test result is displayed if any of the tests fail,
otherwise the Learn Circuit function has been successfully completed and you will be returned to the main settings
page.
See
‘
Troubleshooting
Common Problems’
Section if the Learn Circuit fails for more guidance.
Note: It is acceptable to use a circuit that gives a caution message as the Astral device will compensate for circuit
resistance and compliance.
