scope:

This document specifies the reference method (RM) for the measurement of carbon dioxide (CO₂) based on the infrared (IR) absorption principle. It includes the sampling and the gas conditioning system, and allows the determination of the CO₂ in flue gases emitted to the atmosphere from ducts and stacks. This document specifies the measurement of the total CO₂ concentration and does not differentiate between biogenic and fossil derived CO₂.

This document specifies the characteristics to be determined and the performance criteria to be fulfilled by portable automated measuring systems (P-AMS) using the IR measurement method. It applies for periodic monitoring and for the calibration or control of automated measuring systems (AMS) permanently installed on a stack, for regulatory or other purposes.