Owner's manual

<6 BASIC OPERATION> 6-14
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
6.3 Non-Process Parameters (required when Instrument Air Purging)
Non-ProcessParametersistheYokogawaLaserAnalysisDivisiontermusedtodeneregionsoftheop-
ticalpaththatmaybepurgedwithagascontainingtheactualtarget(measured)gas.Themostcommon
applicationofthisistouseInstrumentAir(~20.9%O2)asthepurgegasforanalyzersmeasuringOxy-
genintheprocess.TheLaser&Detectmeasurementunitwillcontainsomeoxygenmoleculeswhich
mustbemathematicallycancelledoutusingtheNon-Processprocessparameters.
In order for the analyzer to measure correctly under these purge conditions, the analyzer must know the
correct parameters such that the measured output value has been compensated i.e. the oxygen in the
purge gas has been taken into account when determining the process oxygen concentration.
Calibration – The analyzer MUST be calibrated (Zero and Span) as per the normal methods outlined
in the standard User’s Guide. When performing a Zero Calibration, ensure that the entire optical path is
purged with Nitrogen. When performing a Span Calibration, ensure the correct procedures are followed!
ADVANCED CONFIGURE MENU (UPDATED)
TheAdvancedCongureMenuhasbeenupdatedwith
a sub-section titled Non-Process Parameters.
NON-PROCESS PARAMETERS
These non-process parameters are for the measured
gas in the optical path but outside of the process path
length.
TheseparametersMUSTbeenteredforanaccurate
measurementifthepurgeisnotnitrogen(when
measuringOxygen).