Care
77
Replacing the O2 sensors
— If the following message appears:
!!! O2 measurement inop.
Exchange O2 sensor 1
or
!!! O2 measurement inop.
Exchange O2 sensor 2
or
— if calibration is no longer possible.
Savina uses one O
2 sensor for O2 control and display
(sensor 1) and a separate O
2 sensor for O2 monitoring
(sensor 2).
1 Swivel inspiration port downwards
2 Unscrew screw, using a coin or similar object, and remove
cover plate.
3/4 Remove used O2 sensor from housing
3/4 Slide new O2 sensor into respective housing for
"Sensor 1" or "Sensor 2". Turn using light pressure
until the O2 sensor slides further into the housing.
2 Screw cover plate into place.
Sensor 1
is automatically calibrated after fitting.
Sensor 2:
● Allow not more than 20 minutes warm-up time to elapse,
then
● calibrate manually, see page 49.
The internal battery supplies the two O
2 sensors with current
even when Savina is switched off. This enables Savina to
supply valid O
2 measured values as soon as it is switched on.
If the internal battery is discharged, Savina does not supply any
O
2 measured values for the first 20 minutes after switching on.
The O
2 dosage operates at reduced accuracy during this time.
Using an external battery
Either 12 V batteries or 24 V batteries can be connected as
the external battery.
The use of 24 V batteries (two 12 V batteries arranged in
series) with a minimum capacity of 15 Ah each is
recommended.
With batteries of this type, the efficiency of the DC power
supply and the associated operating time is considerably
greater than with 12 V batteries of comparable capacity.
054 29 170
2
34
1
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