How to Calibrate MT-CO2-A37 Support February 10, 2022 10:03 Updated Follow It is recommended to calibrate the device before use. And repeat periodically with use. Related articles CO2 Meters for Indoor Ventilation Control Coverage or scope of CO2 meters Updating or Reinstalling TESTER7-IP-3HD Firmware UPS Calculator to know the duration as a function of the load ABK-703B-S: connection diagram with an Access Control device