Analytical gases.

§ 86.514-78 Analytical gases.

(a) Analyzer gases. (1) Gases for the CO and CO2 analyzers shall be single blends of CO and CO2 respectively using nitrogen as the diluent.

(2) Gases for the THC analyzer shall be:

(i) Single blends of propane using air as the diluent; and

(ii) Optionally, for response factor determination, single blends of methanol using air as the diluent.

(3) Gases for the NOX analyzer shall be single blends of NO named as NOX with a maximum NO2 concentration of 5 percent of the nominal value using nitrogen as the diluent.

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