Adjustment types - GMP231

You can adjust the CO₂ measurement of GMP231 in 1 or 2 points.

• 1-point adjustment is recommended if you are interested in maintaining a fixed CO₂ level inside the chamber. For best result, use a calibration gas with a CO₂ concentration that is close to the intended level.
• 2-point adjustment is recommended if you typically measure a variable CO₂ level.

Available adjustment functions depend on the interface you use to operate the GMP231. If you want to integrate the functionality into the incubator’s control system, the I²C interface and the Vaisala Industrial Protocol are recommended. If you want to compare the reading of the GMP231 to a reference instrument as adjust it accordingly, use an MI70 handheld indicator and a reference probe.