Ametek Land LANCOM 4 - Page 79

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Lancom 4Portable Flue Gas Analyser
User Guide
16 Glossary
Analogue Output SET-UP > SYSTEM > ANALOGUE OUTPUT: ENABLED, DISABLED. Either
enablesordisablestheanalogueoutputsiftted.
Analysis See Wet Analysis.
Clear Faults SET-UP > SYSTEM > CLEAR FAULTS: YES / NO. Set to yes to clear any faults –
see section “The Fault Light”.
CO2 Compensation SET-UP > SYSTEM > CO2 COMPENSATION. The Oxygen sensor has
a small cross-sensitivity to CO
2
which is corrected automatically. The normal value for CO
2
Compensation is 0.30. This value should only be changed on advice from LAND or an approved
distributor.
CxHy Units SETUP > SYSTEM > CxHy UNITS. Determines whether the hydrocarbons reading
is displayed in ppm or as a percentage.
Display Units SET-UP > SYSTEM > DISPLAY UNITS: ppm, mg, lb/mm/Btu. Change the display
units of measurement which appear on the screen, in printout and in data logs.
Dry Analysis – see Wet Analysis.
Excess Air This indicates the amount of air not being burnt in the process. This calculation is
performedbytheinstrumentandisdeterminedaswithFuelEciency,bytheuseofvarious
factors. See also Fuel Data.
Flow Displayed on the gas readings screen, printouts and data logs. This is a measurement of
thevolumetricow.SeeMassFlow.
Flue TempThetemperatureoftheuegasasmeasuredbytheprobe.Thisisusedinthe
mass ow  and eciency calculations.  Flue temperature cannot be measured by the High
Temperature probe.
Fuel Data SET-UP > SYSTEM > FUEL DATA. These constants are used to calculate the fuel
eciency.
Fuel
EciencySET-UP>SYSTEM>FUELEFFICIENCY.ThisshouldalwaysbesettoTYPEA.
Calculatedasapercentage,indicatestheeciencyofthecombustionprocess.Fueleciency
is shown on the gas reading display and also appears on the printout and in data logs. The
ueeciencycalculationisbasedonBS845:Part1:1987.Calculationisperformedusingpre-
programmedconstantsforeachfueltype.SeeFuelData.Fueleciencycannotbecalculated
when using the High Temperature Probe. See also Loss.
Fuel Type
SET-UP> FUEL TYPE. Thefueltypeusedat a specic measurementpoint.The
options are: Wood, Light Fuel Oil, Heavy Fuel Oil, Natural Gas, Propane, Coal. Fuel Type must
bespeciediffueleciencyisbeingmeasured.SeealsoFuelEciency.
Language SET-UP >LANGUAGE > ENGLISH. This selects the language types available to the
user. Languages other than English must be requested when ordering. Alternative languages
cannotberetrotted.
LossThelossindicatestheineciencyoftheburnersandisdisplayedasapercentage.Loss
is displayed on the gas readings screen, printouts and in data logs.
NO2
FactorSET-UP>SYSTEM.WherenoNO2sensoristtedtheNO2factor–thepercentage
correction required for calculated NOx readings must be entered.
O2 Factor SET-UP > SYSTEM > O2 FACTOR. O2 Normalization. This is the oxygen content – as
a percentage – which is required when oxygen normalization is ON.
O2 Normalization SET-UP > SYSTEM > O2 NORMALIZATION. See also O
2
Factor. Oxygen
normalization is optional and can be disabled. To comply with some environmental legislation,
gasreadingsarerequiredtobegiveninrelationshiptoaspecicoxygencontent(normalization).
See also O2 factor and O2 Normalization.
Pump Speed This value is only applicable when making smoke measurements. It is necessary
to either increase or decrease the ow of smoke through the probe to obtain an acceptable
quantity measurement. The standard time/ow regulation is subject to local regulations.
Contact LAND Instruments International for advice.
Service Light The service light illuminates when the Lancom 4 requires attention.
Show Negatives SET-UP > SYSTEM > SHOW NEGATIVES: YES, NO. Negative values for gas
concentrations and other values can be displayed. When Show Negatives is set to NO values
below zero will be displayed as zero.