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4.13 Analysis Menu
Through this key the analysis results are displayed. Moreover the operator is allowed, once this key is further
depressed, to display and possibly modify the analysis parameters before proceeding with the measurements.
Measured values are:
O
2
: Oxygen percentage in the Flue.
CO: CO concentration in the Flue, with low sensitivity to H2 (8,000 ppm full range, 1 ppm
resolution).
NO: NO concentration in the Flue (5,000 ppm full range, 1 ppm resolution).
Tf : Flue Gas Temperature.
Ta : Ambient / Room / Combustion Incoming Air temperature.
Calculated values are:
Xair : Excess of air, ratio between the combustion air volume and the volume demanded by
combustion under stoichiometric conditions.
CO
2
: Carbon dioxide percentage in the Flue gas.
∆T : Difference between flue gases temperature and combustion supply air temperature.
NOx: Nitrogen oxides concentration in flue gases.
Loss: The sensible efficiency value is to be compared against the minimum efficiency stated for
the heating systems performances.
Eff: Total efficiency. It is the sum of sensible efficiency and the additional efficiently deriving
from the recovery of water vapour condensation contained in the flue gasses, calculated
according to the UNI 10389-1 standard. When it is greater than sensible efficiency, then
condensation is taking place. It is referred to LHV (Lower Heating Value) and can exceed
100%.
4.13.1 Zoom function
This function can only be accessed when the analysis screen is displayed. This key is used to view the test data
on a complete list or multi-page list or to zoom in on displayed text for better reading.
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