Posted: 21.06.2021 16:55
Is the calibration set point 420 ppm or 400 ppm?
I thought I had read in the manual that it is now 420 ppm reflecting the current global CO2 concentation, but while calibrating recently I see on the app that it says 400 ppm.
What concentration is used at the factory to calibrate the unit after manufacture?
Posted: 28.06.2021 18:00
We at Aranet assume an open-air CO2 level equal to 420 ppm. But you can check open-air CO2 level at your location with third-party service, f.e. https://earth.nullschool.net/#current/chem/surface/level/overlay=co2sc/orthographic=-341.79,55.60,14336/loc=24.042,57.040
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