Emerson Micro Motion 9739 MVD

Configureprocessmeasurement
2.SetSlugHighLimittothehighestdensityvaluethatisconsiderednormalinyourprocess.
Tip
Toreducetheoccurrenceofslugowalarmsthatarenotsignicanttoyourprocess,setSlugHigh
Limitslightlyaboveyourexpectedhighestprocessdensity.
Valuesabovethiswillcausethetransmittertoperformtheconguredslugowaction.Typically,
thisvalueisthehighestdensityvalueinthenormalrangeofyourprocess.
YoumustenterSlugHighLimiting/cm
3
,evenifanotherunithasbeenconguredfordensity
measurement.
ThedefaultvalueforSlugHighLimitis5.0g/cm
3
.Therangeis0.0g/cm
3
to10.0g/cm
3
.
3.SetSlugDurationtothenumberofsecondsthatthetransmitterwillwaitforaslugowconditionto
clearbeforeperformingtheconguredslugowaction.
ThedefaultvalueforSlugDurationis0.0seconds.Therangeis0.0secondsto60.0seconds.
Slugflowdetectionandreporting
Slugowistypicallyusedasanindicatoroftwo-phaseow(gasinaliquidprocessorliquidinagas
process).Two-phaseowcancauseavarietyofprocesscontrolissues.Byconguringtheslugow
parametersappropriatelyforyourapplication,youcandetectprocessconditionsthatrequirecorrection.
Tip
Todecreasetheoccurrenceofslugowalarms,lowerSlugLowLimitorraiseSlugHighLimit.
AconditionofslugowoccurswheneverthemeasureddensitygoesbelowSlugLowLimitorabove
SlugHighLimit.Ifthisoccurs:
•Aslugowalarmispostedtotheactivealarmlog.
•Alloutputsthatareconguredtorepresentowrateholdtheirlast“pre-slugow”valueforthe
conguredSlugDuration.
IftheslugowconditionclearsbeforeSlugDurationexpires:
•Outputsthatrepresentowratereverttoreportingactualow.
•Theslugowalarmisdeactivated,butremainsintheactivealarmloguntilitisacknowledged.
IftheslugowconditiondoesnotclearbeforeSlugDurationexpires,outputsthatrepresentowrate
reportaowrateof0.
IfSlugDurationissetto0.0seconds,outputsthatrepresentowratewillreportaowrateof0assoonas
slugowisdetected.
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MicroMotion9739MVDTransmitters