ABB GLA451 User Manual page 68

USER MANUAL | ICOS | INSTRUCTIONS | UM/ICOS-EN REV. B.2
Integration of the measured spectra with the measured values of:

Gas temperature

Gas pressure

Path length

Line strength of the probed transition
Enables you to determine the mole fraction directly from the relation:
Use this equation to determine gas concentrations, even in hostile environments without
using calibration gases or reference standards. These values are measured:

Mixtures containing several species

Flows at elevated temperatures and pressures
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