Skip to content

Calibrate a Wireless CO2 Sensor

Calibrate the Wireless CO2 Sensor (PS-3208) so that it reads 420 ppm for fresh air.

Standard calibration

  1. Connect the sensor to Capstone.
  2. Insert the probe into the sampling bottle. Form an airtight seal with the rubber collar.
  3. Allow the sensor to equilibrate for 3 minutes.
  4. In the Tools palette, select Calibration .
  5. Click Next, then Finish. Click OK when calibration is complete.
  6. Click Calibration again to close the panel.

Note

If there is significant drift, or if the value is outside the expected range after performing the initial calibration, perform the Extended calibration procedure in the next section.

Extended calibration

Tip

This procedure can be performed with more than one sensor simultaneously.

  1. Take your sensor and computing device outside in fresh air. You do not need the sampling bottle. Place in the shade away from CO2 sources such as cars and people.
  2. Connect the sensor to your device.
  3. Leave the sensor undisturbed and connected for about 25 minutes.
  4. Return after 25 minutes and perform the standard calibration procedure.