Dräger Evita 4 - Calibrating CO Sensor; Calibrating CO 2 Sensor

105
Operation
Calibrating
2
1
3
Calibrating the CO2 sensor
The CO2 sensor must be calibrated:
– if the check values are not met on checking calibration
with filter or calibration gas.
– as part of the half-yearly inspection of Evita 4.
● Switch on Evita 4. Wait about for 3 minutes for the
machine to complete its warm-up phase.
● Press the »Calibration« key.
Display (example):
● Touch »CO2« screen key.
Display (example):
● Carry out CO2 zero calibration, page 100.
After the CO2 zero calibration:
● Touch the »Cal.« screen key.
● Connect the calibration gas supply.
Use the cuvette from the calibration set!
1 Connect the calibration gas cylinder and the cuvette
of the calibration set to the hose.
2 Remove the CO2 sensor from its park bracket and fit
it to the cuvette of the calibration set.
● Read the CO2, O2 and N2O concentrations (Vol.%)
of the calibration gas from the test cylinder.
3 Calibration gas e.g.: 5 Vol.% CO2
95 Vol.% N2
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