103
Operation
Calibrating
4,1 Vol%
The screen displays the test value of the CO2 concen-
tration FCO2.
This value must agree to within ±3 Vol.% with the speci-
fication on the test filter.
Example: 4.1 Vol.% on the filter:
permitted value range: 3.8 to 4.4 Vol.%
If the test value is outside the permitted tolerance, the
test gas must be checked or calibrated.
● Push the CO2 sensor back on to the cuvette.
Checking CO2 calibration with calibration gas
– if the specified calibration value was not met when
testing with the test filter
– at least once per half-year.
● Switch on Evita 4. Wait about 3 minutes for the CO2
sensor to complete its warm-up phase.
● Press the »Calibration« key.
Display (example):
● Touch the »CO2« screen key.
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