KANE905 Operators Manual
Page 43
NOx:
Calculated total Nitric oxides displayed in ppm or mg/m3.
Where NOx = NO + P%NO, note P can be set from 0-9%,
default = 5%. See SELECT menu 5.2.2. Also displayed
as
NOx (n)
referenced to oxygen. The display will read
‘O2 > 20%’ if referenced values are selected and
instrument is sampling clean ambient air.
SO2 :
Sulphur Dioxide reading in ppm or mg/m3. Displayed
when Sulphur Dioxide sensor fitted. Also displayed as
SO2 (n)
referenced to oxygen. The display will read ‘O2 >
20%’ if referenced values selected and instrument is in
clean ambient air.
O2 ref %:
(O2r)
Toxic gas measurements can be referenced to defined
oxygen levels. See SELECT menu for details.
B. COMBUSTION EFFICIENCY CALCULATION
The efficiency calculation is based upon British Standard BS845.
This identifies three sources of loss associated with fuel burning:
Losses due to flue gasses:
Dry Flue gas loss,
Moisture and hydrogen
Sensible heat of water vapour
Unburned gas
Losses due to refuse:
Combustible in ash
Combustible in riddlings
Combustible in dust
Other losses:
radiation
convection
conduction
other unmeasured losses
Net efficiency calculations assume that the energy contained in the water
vapour (formed as a product of combustion and from wet fuel) is
recovered and the wet loss term is zero. Gross efficiency calculations
assume that the energy contained in the water vapour is not recovered.
