Manual

diSPlay ParameterS oN uei CombuStioN aNalyzerS
 • TF(FlueTemperature)UsedtocalculatenettemperatureinFahrenheitorCentigrade.Will
show ambient temperature after fresh air calibration and ‘- O C - ’iftheflueprobeisdisconnected.
 • ∆T (Net Temperature)Indicated by ∆T (Greek letter delta for difference)
- Differential of flue temperature minus ambient (or inlet if set) temperature
   -DifferentialofT1-T2onC125andC127
 • O2 (Oxygen) Direct reading of oxygen from the O2 sensor reading in percentage (%)
 • COCarbonMonoxidereadingdisplayedinppm(partspermillion).‘----’or‘-OC-’is
displayed if there is a fault with the CO sensor or the instrument has not set to zero correctly, switch
off instrument and try again.
 • CO2 Calculated from the fuel selected and the measured O2 level
- Will display “----“ or “-O>-” if the oxygen level is too high to calculate CO2
   -Onlydisplaysareadingduringcombustiontest.‘----’or‘-O>-’isdisplayedwhileinfreshair.
 • X-Air(ExcessAir)
- Indicated by _(Greeksmallcaselambda)or‘X’onscreen
- Indicated by XAIR % on the printout
   -Excessairisacalculationofthepercentageofoxygenabovewhatistheoreticallyrequiredfor
complete combustion
- Isrequiredtocompletelyburnallofthefuelduetopoormixingandtoassistinventingfluegases
- Onlydisplaysareadingduringcombustiontest.‘----’or‘-O>-’isdisplayedwhileinfreshair.
 • Eff (Efficiency)
- Indicated by _ (Greek letter eta) followed by G for gross, N for net or C for condensing on the
screen if the analyzer has these options
   -IndicatedbyEff(G)ontheprintoutifsettoGross(usedintheStates)
   -Eff(N)orEff(C)fortheotherscales(basedonstandardsforthatlocation)
- Is calculated based on gas readings, net temperature and fuel selected.
- This value is combustion efficiency, not appliance efficiency
 • Loss (∆ in the display)
- Total losses calculated from Combustion Theory. This is the summation of the next three param-
eters
    •Dry%:CalculatedheatlostturningtheCarboninthefueltoCarbonDioxide(CO2)
    •Wet%:CalculatedheatlostturningtheHydrogeninthefuelintowater(H20)
    •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, thus this heat is lost up the flue
 • CO AF(CarbonMonoxideAir-Free)Readingreferencedtoanoxygenlevelof0%.Donotconfusethis
  readingwiththeactualCOreadingasdetailedabove.SeetheCombustionEfficiencyCalculation
sections for more details.
 • AMB AirINLETtemperatureusedtocalculatetheNETtemperature.
 • CO/CO2 (CO/CO2 Ratio) The ratio of measured CO divided by calculated CO2.
   -Itgivesanindicationof:
    •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0.004-0.008andaunitinneedofmajoroverhaulwillshowgreaterthan0.008.
   -Onlydisplaysareadingduringcombustiontest.‘----’isdisplayedwhileinfreshair.
GLOSSARY
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