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• FLUE :
Temperature measured by flue gas probe in Centigrade or Fahrenheit. Will
show ambient temperature after fresh air calibration and N\F if probe
disconnected.
• INLET :
Temperature measured by the optional inlet air probe or stored using the Flue
probe. The air probe is plugged into the instrument through the INLET socket.
This figure is used to calculate the NET temperature instead of AMBIENT
when fitted. Will show N\F if not fitted.
• AMBIENT :
Temperature measured by the internal sensor, used in the NET temperature
• CO/CO2 R :
The CO/CO2 ratio, is the ratio of measured CO divided by CO2.
It gives an indication of the following :- How good a gas sample the instrument
is reading. How clean the boiler is running. For example : A new or clean
domestic boiler will display a ratio of less than 0.004, a unit in need of cleaning
0.0040-0.0080 and a unit in need of major overhaul will show greater than
0.008. This only shows a reading when a combustion test is being carried out.
0.0000 is displayed while in fresh air.
• P INDEX :
The CO/CO2 ratio expressed as a percentage %, called the ‘Poison Index”
i.e. P INDEX % = 100 x CO/CO2. 0.00 is displayed while in fresh air.
• XAIR % :
Excess air calculated from the measured oxygen and type of fuel used.
Displays reading during a combustion test +++ is displayed while in fresh air.
• PRESSURE:
Pressure reading. Units can be changed to different scales.
• NO:
Nitric oxide reading in ppm or mg/m3. Displayed when nitric oxide sensor
fitted. Reading can also be referenced to oxygen ppmn or mg/m3n.
• NO2:
Nitrogen dioxide reading in ppm or mg/m3. Displayed when nitrogen dioxide
sensor fitted. Reading can also be referenced to oxygen ppmn or mg/m3n.
• NOx :
Calculated total nitric oxides displayed in ppm or mg/m3.
Reading can also be referenced to oxygen ppmn or mg/m3n.
• SO2 :
Sulphur dioxide reading in ppm or mg/m3. Displayed when sulphur dioxide
sensor fitted. Reading can also be referenced to oxygen ppmn or mg/m3n.
• H2S:
Hydrogen sulphide reading in ppm or mg/m3. Displayed when Hydrogen
sulphide fitted. Reading can also be referenced to oxygen ppmn or mg/m3n.
• HC :
Unburnt Hydrocarbon reading in % of LEL of methane, the sensor is calibrated
with methane. Displayed when a Hydrocarbon sensor fitted.
LEL is the Lower Explosive Limit of a gas when mixed with air, for methane
this has the ratio of 19:1 Air:methane. Below the LEL the mixture can not
ignite and burn. In the Flue an unburnt Hydrocarbons should be well below
this level or there is the potential for an explosion.
• LOSS :
Total losses calculated from Combustion Theory. This is the summation of the
next three parameters.
• DRY :
Calculated heat lost in turning the carbon in the fuel to carbon dioxide (CO2).
• WET :
Calculated heat lost in turning the hydrogen in the fuel into water (H2O).
• CO LOSS % :
Calculated loss due to partially burnt carbon. Any carbon monoxide (CO) in the
flue has the potential to be turned into carbon dioxide and release more heat,
hence this heat is lost up the flue.
• GPS (Y):
Latitude DDMM.MMM 5148.1060
• GPS (X):
Longitude DDDMM.MMM -00011.450
• ATM:
Atmospheric pressure in mbar
Summary of Contents for K9206
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