Calibrating CO2 Sensors

Sensor Pod 02 contains temperature, humidity, and CO2 sensors.

CO2 sensors are calibrated by Tibbo, therefore manual calibration by the user is not necessary. However, as the air pressure and altitude of different environments may impact accuracy, manual calibration is still possible, should the user require it.

Follow the steps below to calibrate the CO2 sensor:

1. Take the OSS device outdoors, in fresh air. Since fresh air generally has a CO2 level of 400 ppm (part per million), OSS can use this as a base point for calibration.
2. Ensure that the device's sensor pod air vents are not blocked in any way.
3. Leave the device for around 15 minutes to 1 hour, allowing air to circulate inside the sensor pod. During this time, do not breath near the device.
4. In the OSS Companion App for Android and iOS, click "Configure" and scan your OSS device's NFC chip by following the on-screen instructions.
5. Go to the "Advanced" tab, and type "CACO2:400" into the "Special Command" field. This will calibrate the CO2 sensor to read the current CO2 ppm as 400. Please note: the command is case sensitive and should be entered without quotation marks.
6. Press "Save" and then reboot the device for the updated calibration to take effect.

Performing a manual calibration will overwrite Tibbo's factory calibration. Factory calibration cannot be recovered, so please take care not to manually calibrate the device in an unsuitable environment.

For the most accurate calibrations, users can place the OSS device into an isolated chamber with controlled CO2 levels and set it to 400 ppm.

When your OSS device next connects to the cloud, you will see one of the following two commands in your event history following a calibration attempt: