CFR 40-1065.350-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.350:H2O interference verification for CO2 NDIR analyzers.
(a) Scope and frequency. If you measure CO2 using an NDIR analyzer, verify the amount of H2O interference after initial analyzer installation and after major maintenance.
CFR 40-1065.350-2014 history
2014CFR 40-1065.350-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.350:H2O interference verification for CO2 NDIR analyzers.