Automatic Background Calibration (ABC) in Senseair CO2 Sensors Explained

The ABC - Automatic Background Calibration algorithm allows the CO2 sensor to dynamically shift its CO2 reading by a constant. It works via storing the lowest CO2 sample taken over the ABC Period and assuming that this low value is equal to a known value (the target value). It then adjusts the output of the CO2 reading by the delta between these values. This algorithm does not affect the linearization of the output signal.

Download the automatic background calibration explanation here (pdf).

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