40
Repair information and instructions
6.10 Calibrating the potentiometer
(after changing pneumatic block including potentiometer)
When the pneumatic block including potentiometer is changed, the potentiometer must be recalibrated for
the board.
1. Make sure the device is switched off.
2. Press the On/Off switch
10
and immediately
hold down the alarm mute button
4
and the
mask/tube ventilation switch
1
. Then release
the button. After a brief interval, the 30 mbar
LED on the bar graph indicator lights up.
3. To set the first calibration value, turn the
adjuster knob
7
fully to the left to the value
V
t
0,1, Freq. 30
.
4. Press the mask/tube switch
1
. The device now
makes a plausibility check.
– If the value is not correct, all alarm LEDs light
up until the correct value is present at the
adjuster knob
7
and has been confirmed
with the mask/tube ventilation switch
1
. Or
you can cancel the potentiometer
calibration process by pressing the On/Off
switch
10
.
– If the value is correct, this is indicated by the
0 mbar LED on the bar graph lighting up.
You can now set the next value.
5. Turn the adjuster knob
7
fully to the right to the
white Demandflow zone.
6. Press the mask/tube switch
1
. The device
accepts this value The LED on the bar graph
lights up, and you can move on to setting the
next value.
7. Turn the adjuster knob
7
back beyond the
index point
8
to the ventilation mode zone,
then to the right again until it reaches the index
point (zone
V
t
1,1, Freq. 14
).
8. Press the mask/tube switch
1
again. The
calibration values are stored and the device
exits the calibration mode.
Note:
Until the last step the calibration mode can be
cancelled at any time by pressing the On/Off
switch
10
, without storing the new values. If an
invalid value is detected during calibration (all
alarm LEDs light up), no value is stored either.
0,1
30
16
11
10
10
12
13
14
0,3
0,6
0,9
1,1
1,1
Freq.(min
-1
)
Stenosis
Disconnection
< 2,7 bar O
2
Demand-
flow
60
mbar
50
40
30
20
10
0
CPR
MEDUMAT
Easy CPR
V
t
(l)
4
1
10
7
8
6
