ECD FCA-22 - Page 21

FCA‐22InstructionManual
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Page21
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DisplayedvalueisLowerthan
DPDtestvalue(cont’d)
Lowtensiononthe
membrane
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Flowtolowthroughtheflow
cell
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Airbubblestrappedon
membrane
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Airbubbleinsidethesensor
betweencathodeand
membrane
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pHindicationlowerthan
actualvalue
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Temperatureindication is 
higherthanactualvalue.
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Verifythe
Me
asuring
Chamberisfullytightened
ontothebodyorreplace
membrane.
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CleanCHFC,fittingsand
tubing,verifythesamplefeed
rateat+10gal/hr.
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LoosenFCSfittingandlift
sensorslightlytopurgeair
trappedintheflowcell.
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Refillsensor,seeMaintenance
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CalibratepHsensororadjust
valueonun
compensatedFCA
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CalibratetheTemperature
(seeCalibration)The
temperaturesensorlagsthe
processtemperaturewaitfor
temperatureequilibrium.
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ZeroChlorineReading
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Noelectrolyteinthesensor
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OpenCircuitonFCS,broken
orbadelectricalconnection
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RefillSensor
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Checkconnectorandwiringto
theconnectorinsidetheC‐22
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UnstableChlorineReading
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Airbubblesonthemembrane
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Changingtemperature,the
lagofthetemperaturesensor
lookslikedrift
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LoosenFCSfittingandlift
sensorslightlytopurgeair
trappedintheflowcell.
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Waitforequilibrium
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