Owner manual

IM 11Y01B02-11E-A 3rd Edition :August 14, 2012-00
3-2<3 INSTALLATION AND WIRING>
3.2 Sample Inlet and Outlet Considerations
The following criteria should be considered when selecting the installation point in respect to the process
conditions(1/4”ODSwageloktubettings):
Process Gas Condition: - The sample should be clean, dry, non-condensing at the inlet to the
sample cell. The dew point of the sample should be below the sample cell operating temperature.
If the sample cell is not heated and un-insulated then the sample must be non-condensing through
the entire ambient operating conditions.
NOTE: Oils, waxes, impure cleaners, and other deposits on the sample cell/mirror will cause
optical noise and subsequent analytical performance degradation. Please take all necessary
precautions to ensure the incoming sample gas is clean and dry at all times!
 ProcessGasFlowConditions–Typically1-10lts/minsampleow.Aso-callednormalow-rate
 wouldbeintheorderof2-3lts/min.Higherow-rateswillimprovethesamplelagtimewithinthe
 measurementcell.Sampleowmetercanbetypicallyinstalledontheinletwhenequippedwith
 needlevalve.Excessiveow-ratesmayresultingastemperaturecontrolissuesifthedeltaTof
incoming gas and cell temperature set-point exceed 15
O
C.
 ProcessGasTemperature–Itisrecommendedthatthesamplegasinletremainswithin+/-15
O
C
of the sample cell temperature set-point. If the sample cell is un-heated then the sample gas
 shouldbewith+/-10
O
Coftheambienttemperature.Pleaseensurethattheprocessgas
entering the sample cell is above the dew point. If necessary, utilize membrane or coalescing type
 lterdeviceontheinlet.
Lower gas temperatures generally lead to better measurements.
•ProcessGasPressure–Itisrecommendedthattheanalyzerbeinstalledatalocationwhere
 pressureuctuationsareminimized.Generallyasaguide,ifthetemperatureofthegasatthepoint
 wheretheanalyzeristobeinstalledistovarybymorethan+/-0.05Bar(+/-0.725psi)thenan
 “Active”inputsignalshouldbeusedforcompensation.
 Ensuretheanalyzerhasbeenselectedandconguredtosuitthemaximumoperatinggas
pressure.
 Ensuretheprocessisolationwindowshavebeenselectedandconguredtosuitethemaximum
design gas pressure.
Lower gas pressures generally lead to better measurements.
Process Dust/Particulate Matter–Itisrecommendedthattheprocessgasislteredto<2uusingprocess
analyticalgradeltrationsystems.