Calibrating the inspiratory O
2
sensor with 100% O
2
by
volume
(Only necessary if sampling O
2
measurement is not
used)
●
Remove the O
2
sensor and fit test adapter 68 01 349
to the sensor.
●
Allow a pure O
2
flow of about 1 L/min to flow across
the O
2
sensor for about 2 minutes.
●
Select the »Config.« screen key.
●
Turn the rotary control to move the cursor from
»
Calibrate
« to »
continue
«, and then select and
confirm »
O
2
sensor 100 Vol.%
«.
●
The clock symbol (
u
) appears after the text. The tick
(
✔
) indicates the end of calibration.
●
Plug the O
2
sensor back into the measuring site.
●
Restore the settings appropriate to the patient.
Checking linearity
– Check linear response monthly.
– First carry out calibration with 100% O
2
by volume
(see illustration)
– Then expose the sensor to the atmosphere for at least
two minutes (approx. 21% O
2
by volume).
– If the values of this measurement are not within the
range 18 to 24% O
2
by volume after a reasonable
time (at least 90 seconds for the inspiratory sensor,
and at least 20 seconds for the sidestream sensor),
the sensor capsule is worn and must be replaced by
a new capsule.
Description
O
2
measurement
176
Calibrating the O
2
sensor for sampling measurement
with 100% by volume O
2
Required for the monthly linearity check.
Prepare a replacement sample line:
●
Cut a sample line hose into two equal halves.
●
Unscrew the original sample line from the water trap
and screw the cut replacement line to the water trap.
At the anaesthetic workstation:
●
Unscrew the fresh gas hose from the breathing
system/circle system.
●
Deliver an O
2
flow of 1 L/min to the O
2
measuring
tube of the anaesthetic workstation and push the hose
of the replacement sample line deep into the fresh gas
hose.
●
Set a pure sampling O
2
flow of about 1 L/min. for
about 2 minutes.
On the monitor:
●
Select the »Config.« screen key.
●
Turn the rotary control to move the cursor from
»
Calibrate
« to »
continue
«, and then select and
confirm »
O
2
sensor 100 Vol.%
«.
●
The clock symbol (
u
) appears after the text. The tick
(
✔
) indicates the end of calibration.
●
Rescrew the original sample line to the water trap.
On the anaesthetic workstation:
●
Reconnect the fresh gas hose.
●
Restore the patient settings.
O
2
ca. 1 L/min
D
1 L/min O
2
Fresh gas hose
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