What would be the first thing to do if Aranet4 device shows CO2 levels well above 500 ppm in fresh air outdoor environment?

aranet-techsupport

Posted: 27.01.2021 23:53

Modified: 25.06.2025 17:42

Please try recalibrating the device as shown in the video: https://www.youtube.com/watch?v=CD8E6WzpvjM except put the sensor in a full outdoor environment during the calibration process for 15 minutes without any person in close proximity.
zeolite

Posted: 21.02.2021 02:19

Is it ok to attempt a calibration outdoors when the temperature is in the 0 C to 10 C range?

I see in the User manual that it says operation < 10 C may result in a shift of sensor reading with slow recovery time.
aranet-techsupport

Posted: 21.02.2021 09:26

As the Aranet4 device has reduced measurement accuracy in the temperature range 0...+10 °C, then it is recommended to calibrate it in the temperature range +15 … +35 °C.
zeolite

Posted: 21.02.2021 14:30

Ok that is very good to know becuase for 7 months of the year our outdoor temperatures are < 15 C so calibrating outdoors will not be possible. We will look for a temperature-controlled indoor facility with a large fresh air draw and no humans about.
aranet-techsupport

Posted: 21.02.2021 17:36

If possible then the most accurate calibration will be performed if the Aranet4 device can be placed in a closed environment filled with 420 ppm CO2 concentration level reference gas during the calibration process.

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