Stephan EVETR, Instructions For Use Manual, Page: 173 / 254

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8 CO2 measurement (optional)
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Fritz Stephan GmbH GA-070T-0518V2.7-HAO-EN 173
8 CO
2
measurement (optional)
The CO
2
measurement with the EVE
TR
can be performed using the
mainstream or sidestream technique. The measurement principle is based
on infrared spectroscopy. This means that infrared light is absorbed by
CO
2
molecules. The higher the CO
2
level in the patient gas, the weaker
the measurable infrared light at the end of the detector.
The measuring data is output either numerically (see chapter 3.2.2) or
graphically as curves on the display of the
EVE
TR
(see chapter 3.2.9).
Fig. 97: CO
2
curve display
Data output