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K800000000EJ 020650A0 170512
4.9 Analysis configuration menu
Through this menu the user can configure the available parameters for a proper combustion analysis.
Fuel:
Lets the user select the type of fuel to be used during analysis. This data can be changed either from this menu
or during the analysis itself.
Measurement units:
Through this submenu the user can modify the units of measurement for all the analysis parameters, depending
on how they are used.
O2 Reference:
In this mode the user can set the oxygen percentage level that pollutant emission values are corrected to for
that given O2 reference level.
Automatic analysis:
The user can set analysis mode to either manual or automatic.
In manual mode the user performs the three necessary analysis operations manually. In automatic mode the
cycle duration for each reading must also be set - in this case the instrument will conduct each analysis in the
specified time.
Printing may also be manual or automatic. If “auto” printing is selected, the instrument will automatically print the
analysis report in a predetermined format at the end of the automatic analysis.
Condensation
The burner efficiency figure when condensation takes place is influenced by atmospheric pressure and humidity
of the combustion air.
As the atmospheric pressure is hardly precisely known, the operator is asked to enter a related parameter, i.e.
the altitude of the place above the sea level, from which the pressure is then derived once the dependency from
atmospheric conditions is neglected. In calculations the value of 101325 Pa is assumed as atmospheric
pressure at sea level.
Further the air relative humidity input is allowed, being this calculated at the combustion air temperature as
measured from the instrument; in case this value is unknow the operator is recommended to enter 50% for this
value.
NOx/NO Factor
NOx/NO: all the nitrogen oxides which are present in the flue emissions (Nitrogen oxide = NO)
In the combustion processes, it is found out that the NO
2
percentage contained in the flue gas are typically 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 fumes can be however set at a value other than 3% (default value).
Alarms:
This submenu allows the user to set and memorise 5 alarms, defining the monitored parameter for each, the
alarm threshold and relative unit of measurement and whether it is a low or high-level alarm.
Low-level alarms are triggered when the reading drops below the defined threshold, whereas high-level alarms
are triggered when the reading rises above the defined threshold.
When an alarm threshold is crossed, the instrument emits an intermittent audible alarm besides activating a
visible alarm wherein the background of the name of the relative reading will start flashing in the analysis
screen.
When the CO and NO concentration thresholds are crossed, besides activating the audible and visible alarms,
the CO and NO solenoid valves may also be set to intervene and thereby interrupt sample flow.
If the instrument is not fitted with a solenoid valve, the sample pump will in any case be stopped.
Autozero/Pump:
This submenu is used to set the duration of the analyzer auto-calibration cycle. It may also be used to switch off
or switch on the sample pump temporarily. The sample pump cannot be switched off if the auto-calibration cycle
is under way.
Operat
or:
The name of the operator conducting the analysis may be set or modified through this submenu. A maximum of
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