Environmental compensation - GMP231

GMP231 User Guide

Document code
English (United States)
Document type
User guide

GMP231 improves the CO2 measurement accuracy by applying various environmental compensations. GMP231 compensates for the effects of:

  • Pressure
  • Temperature
  • Background gas oxygen (O2) content
  • Background gas relative humidity (%RH)

Compensation parameters are configured on the order form when ordering the probe, and can later be updated using serial commands, MI70 Indicator, or I2C protocol. If the probe is integrated in a system that measures one or more of the compensation parameters, they can be updated to the probe continuously.

You can also turn off any of the compensations. In that case, GMP231 uses the default compensation value that is mathematically neutral for the probe’s internal compensation model.

For more information on the effect of the compensations on measurement accuracy, see GMP231 specifications.