Cgas = (C – Co) Cma/Cm - Co
Cgas = Gas concentration, dry basis, CO2 and O2 = %
CO and NOx = ppmv
C = Average gas concentration indicated by gas analyzer, dry basis, % or ppmv
Co = Average of initial and final system calibration bias check response for the zero gas, % or ppmv
Cm = Average of initial and final system calibration bias check response for the upscale calibration gas, % or ppmv
Cma = Actual concentration of the upscale calibration gas. % or ppmv
Cadj = Cd x (20.9/20.9 - %O2)
Cadj = Pollutant concentration corrected to 20.9% O2 ppm
Cd = Pollutant concentration measured, dry basis, ppm
%O2 = Measured O2 concentration dry basis, %
