CFR 40-1065.355-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.355:H2O and CO2 interference verification for CO NDIR analyzers.
(a) Scope and frequency. If you measure CO using an NDIR analyzer, verify the amount of H2O and CO2 interference after initial analyzer installation and after major maintenance.
CFR 40-1065.355-2014 history
2014CFR 40-1065.355-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.355:H2O and CO2 interference verification for CO NDIR analyzers.