Heyer iTernIS ADV, Operator'S Manual

Page: 58 / 218

Start-up and initial calibration | iTernIS ADV
5. 10
PEEP is produced from an air flow generated by a proportional valve. The calibra -
tion of this valve is the first calibration carried out during this procedure.
In each initial calibration, the expiratory flow measurement element is calibrated.
The known flows are sent through the expiratory pneumotachograph, and the res
-
ponse of the related differential pressure transducers is monitored to characterize
their response and to develop an accurate calibration table.
During the final stage of the calibration process, a calibration of the O
2
cell shall be
performed.
The oxygen sensor calibration may fail in the following cases:
• The gas entering the OXYGEN inlet is not oxygen, or its concentration is not ade -
quate.
• The sensor is exhausted.
Fig. 5-9 On-screen message showing an O
2
sensor calibration
failure.
NOTE
• Recalibration of the patient circuit during ope -
ration of the ventilator must be carried out by
disconnecting the patient circuit and occluding
the opening of the Y-shaped connector. Take
precautions to provide an alternative ventilation
method during recalibration, if this were neces-
sary.
WARNING
• It is possible to recalibrate the patient circuit,
and the O
2
cell at any time during operation
of the ventilator. Accessing from [Menu] >>
Tools >> Calibrations both calibrations can
be run individually (see Menu chapter).
5.7.2 | PEEP valve calibration
5.7.3 | Calibration of expiratory
pneumotachograph
5.7.4 | Calibration of the O
2
cell
5.7.4.1 | Oxygen sensor failed
calibration