Teledyne PEM-9002 - Digital flue gas analyzer - Manual (Page 11)

2.1 Calculation Formulae
Calculation of the C ue:
CO
Measured oxygen content in % Volume.
21: Oxygen content of the air in % Volume.
Calculation of the waste gas loss: in %
T.Gas: Waste / flue gas temperature in °F or °C.
T.Room: Combustion / ambient temperature in °F or °C.
A2, B: Fuel-specific factors.
Calculation of the excess air value (Lambda):
Calculation of the combustion efficiency value (Eta): in %
Calculation of CO 0% (undiluted): in ppm
O2
CO
20.9
A2
qA = ( T.Gas - T.Air ) * (---------- + B)
21 - O
Lambda =
Eta = 100 - qA
CO0% = CO * Lambda
O2 val
2max: Max. CO -value (fuel-specific) in % Volume.
O2:
2
2
= CO * ( 1 - ------- )
20.9
2max
CO2max
- ----------- = ------------
CO2 20.9 - O2
in % Volume
2
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