Since CO₂ measurement can be a new parameter for some users, this article provides some basic question and answer topics related to calibration of this sensor.

How is CO₂NTROL calibrated?

CO₂NTROL sensors must be calibrated at two points using ArcAir software. The first is the “Zero Point”, calibrated in air or CO₂-free environment such as nitrogen. The second point is the “CO2 point”, calibrated in a certified gas mixture CO₂ / N₂ (suggested 20% CO₂ and 80% N₂). During calibration, the sensor automatically controls the stability of the CO₂ and temperature signals.

Why is a two point calibration required?

A two point calibration ensures the best accuracy across the entire measurement range of the sensor. CO₂NTROL also has the option for a single point product calibration which may be performed after initial two point calibration during the process. If needed, the product calibration will offset the measurement value to allow it to correlate with off-line CO2 readings.