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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
:
Oxygen percentage in the fumes.
2
CO + H
:
CO concentration in the fumes.
2
CO + H
low range: CO concentration in the fumes, with 0.1ppm resolution and more accuracy.
2
CO:
CO concentration in the fumes.
CO %:
CO concentration in the fumes.
NO:
NO concentration in the fumes.
NO low range:
NO concentration in the fumes, with 0.1ppm resolution and more accuracy.
SO
:
SO
2
SO2 low range:
SO
NO
:
NO
2
NO2 low range:
NO
CxHy:
Unburnt hydrocarbon concentration referred to natural gas (CH4).
CO
:
CO
2
Tf :
Fumes temperature.
Ta :
Combustion air temperature.
Calculated values are:
λ,n :
Excess of air, ratio between the combustion air volume and the volume demanded by
combustion under stoichiometric conditions.
CO
:
Carbon dioxide percentage in the fumes.
2
CO diluted:
Increase system of the measurement range and protection of the CO sensor.
∆T :
Difference between flue gases temperature and combustion supply air temperature.
NOx:
Nitrogen oxides concentration in flue gases.
Qs:
Percentage of heat lost through the stack.
ηs:
Sensible efficiency. This is the burner efficiency calculated according to the UNI 10389-1
standard, as ratio between the conventional heating power and the burner heating power.
Among the combustion losses, only the sensible heat lost with the flue gases is taken into
account, thus neglecting the radiation losses and incomplete combustion losses; this
value is referred to LHV (Lower Heating Value) and cannot be higher than 100%.
The sensible efficiency value is to be compared against the minimum efficiency stated for
the heating systems performances.
ηt:
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 Menu
This menu 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.
K900000000SE 022628A0 071013
concentration in the fumes
2
concentration in the fumes, with 0.1ppm resolution and more accuracy.
2
concentration in the fumes
2
concentration in the fumes, with 0.1ppm resolution and more accuracy.
2
concentration in the fumes.
2
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