29
>
9.4.1
Menu→Configuration→Analysis
SUB MENU
FUNCTION
Fuel
Lets the user select the type of fuel to be used during analysis.
Condensation
The burner efficiency figure when condensation takes place is influenced by at-
mospheric pressure and humidity of the combustion air. As the atmospheric
pressure is hardly precisely known, the operator is asked to enter a related pa-
rameter, i.e. the altitude of the place above the sea level, from which the pres-
sure is then derived once the dependency from atmospheric conditions is ne-
glected. In calculations the value of 101325 Pa is assumed as atmospheric pres-
sure at sea level. Further the air relative humidity input is allowed, being this cal-
culated at the combustion air temperature as measured from the instrument; in
case this value is unknown the operator is recommended to enter 50% for this
value.
O
2
reference
In this mode the user can set the oxygen percentage level to which pollutant
emission values detected during analysis will be referenced.
Measure units
Through this submenu the user can modify the units of measurement for all the
analysis parameters, depending on how they are used.
Autozero
In this sub menu it is possible to modify the auto zero cycle duration and the du-
ration of the sensor cleaning cycle.
Air temp.
In this submenu there is a possibility to acquire or manually enter the combus-
tion air temperature.
Nox/NO Ratio
(If the version of
the instrument
foresees it)
NOx/NO: all the nitrogen oxides which are present in the flue emissions (Nitric
oxide = NO, Nitrogen dioxide = NO
2
); total nitrogen oxides = NOx (NO + NO
2
). In
the combustion processes, it is found out that the
NO
2
percentage contained in
the gas is not far from very low values (3%); hence it is possible to obtain the NOx
value by a simple calculation without using a direct measurement with a further
NO
2
sensor. The NO
2
percentage value contained in the gas can be however set
at a value other than 3% (default value).
15/06/18 10:00
ANALYSIS
►
Fuel
Condensation
O
2
reference
Measure units
Autozero
Air temp.
KEY
FUNCTION
ESC
Returns to the previous screen.
>
Selects the available parameters.
OK
Enters in the selected parameter.
Summary of Contents for E500
Page 2: ......
Page 17: ...17 7 5 Connection diagram AA AL05 AACTA03A AAC KP02 AA SF7 A...
Page 35: ...35 15 06 18 10 00 AUTOZERO Autozero 065 s Purging 0 s OK...
Page 43: ...43 0 5 l m...
Page 61: ...61...
