(a) Scope and frequency. If you use a chiller to dry a sample upstream of a NOX measurement instrument, but you don't use an NO2-to-NO converter upstream of the chiller, you must perform this verification for chiller NO2 penetration. Perform this verification
CFR 40-1065.376-2014 history
2014CFR 40-1065.376-2014 Protection of Environment. Part1065:Engine-testing procedures. Section1065.376:Chiller NO2 penetration.