Emerson Micro Motion 9739 MVD

Troubleshooting
Tip
Fortypicalapplications,MicroMotionrecommendssettingFlowCutofftothezerostabilityofyoursensor,
multipliedby10.
10.24Checkforslugflow
Thedefaultslugowlimitsareappropriateformostapplications.Raisingthelowslugowlimitor
loweringthehighslugowlimitwillincreasethepossibilityofthetransmitterreportingslugow
conditions.
Ifsluglimitshavebeencongured,andslugowoccurs,aslugowalarmwillbegenerated.Outputs
thatareconguredforowrateholdtheirlastknownvalueuntiltheslugowclears,oruptothe
conguredslugowduration,whichevercomesrst.
Procedure
1.Checkwhetherslugowalarmshavebeengenerated.
Ifthetransmitterisnotgeneratingslugowalarms,thenslugowisnotthesourceofyourproblem.
2.Checktheprocessforcavitation,ashing,orleaks.
3.Checktheconguredslugowlimitsandduration.
Aslugowdurationof0.0secondswillcauseowoutputstoreportzeroowassoonasslug
owisdetected.Ifyouareexperiencingslugowalarmsandnoowoutput,thismayberesolved
byincreasingtheslugowduration.
Tip
Thedefaulthighslugowlimit(5.0g/cm
3
)isappropriateformostapplications.
4.Monitorthedensityoutputundernormalprocessconditions.
Itmaybenecessarytoadjusttheslugowlimitsanddurationtoaccountforthenormaldensity
variationinyourprocess.
10.25Checkthedrivegain
Collectingdrivegaindata
Toknowwhetheryourdrivegainisexcessiveorerratic,youmustcollectdrivegaindataduringthe
problemconditionandcompareittodrivegaindatafromaperiodofnormaloperation.
ConfigurationandUseManual
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