How to calibrate if device is outdoors but CO2 is above 420ppm?
Posted: 20.08.2021 06:12
I've been meaning to calibrate my Aranet4 but the problem is when I place the device in an outdoor environment, the lowest CO2 reading I'm able to get is in the 443-480. So far, I haven't even been able to get it back down in the 440s. My question is, would it be okay/safe to trigger the calibration as long as its in an outdoors environment, even if the reading isn't in the 400-420ppm range?
Posted: 20.08.2021 09:01
It can happen that outdoor CO2 level is above 420 ppm. You can check it with third party services like https://earth.nullschool.net/#current/chem/surface/level/overlay=co2sc/orthographic=-354.32,51.43,1792/loc=-6.785,53.865
So, you can launch Aranet4 CO2 calibration and then compare the measurement data.
Posted: 22.08.2021 06:25
Thanks for this. What do I do though if the CO2 levels based on the data is suppoed to be around 420ppm but I still can't manage to get a reading close to that? Still logging closer to 500ppm than 400. Do I still trigger calibration in this case?
Posted: 23.08.2021 11:32
Please try manual calibration in the open-air one more time and compare Aranet4 open-air measurement with https://earth.nullschool.net/#current/chem/surface/level/overlay=co2sc/orthographic=-354.32,51.43,1792/loc=-6.785,53.865
Don't forget to choose your location on the map above. If the difference still remains too high, please contact email@example.com.
Posted: 25.08.2021 09:14
Happy to report that after manual calibration, it seems to have fixed the issue. I checked the CO2 levels in my location previously and they did reflect 419ppm. Prior to the calibration, lowest number I got outdoors was in the 470s, but now was able to get a reading of about 408. Anyway, just wanted to say thanks for the help!
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