Important - Airmonitor Plus is equipped with a high-precision non-dispersive absorption infra-red (NDIR) gas sensor, which must be calibrated to ensure accurate readings.
1) Power Up: Press the rear button to turn on the Airmonitor.
2) Ventilate: Place the Airmonitor in a ventilated area, such as outside, for 5 minutes.
3) Calibrate: Press the rear button three times quickly. You will hear a beep and see the CO2 display change to -- indicating the calibration process has started. After a few seconds, it will be complete and ready for use.
4) Additional Calibrations: Temperature and humidity sensors will calibrate automatically over the next few hours.
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