How do I calibrate a CO2 controller?
How do you recalibrate a Co2 monitor?
These are some of the most common questions people ask about CO2 monitors. Most monitors will have a calibration button, you will need to enter the calibration setting. Once in there it is recommended to take the monitor outside. Once calibration is done the PPM levels should be around 300ppm. If you do end up calibrating indoors the PPM level should be higher, around 400-500PPM.