Emerson Micro Motion 9739 MVD

Troubleshooting
Ifthetransmitterisinahazardousarea,donotreapplypowertothetransmitterwith
thehousingcoverremoved.Reapplyingpowertothetransmitterwhilethehousing
coverisremovedcouldcauseanexplosion.
7.Useavoltmetertotestthevoltageatthetransmitter’spowersupplyterminals.
Thevoltageshouldbewithinspeciedlimits.ForDCpower,youmayneedtosizethecable.
10.10Checksensor-to-transmitterwiring
Prerequisites
Youwillneedacopyoftheinstallationmanualforyourtransmitter.
Procedure
1.Beforeopeningthewiringcompartments,disconnectthepowersource.
Ifthetransmitterisinahazardousarea,waitveminutesafterdisconnectingthe
power.
2.Verifythatthetransmitterisconnectedtothesensoraccordingtotheinformationprovidedin
yourtransmitterinstallationmanual.
3.Verifythatthewiresaremakinggoodcontactwiththeterminals.
4.Checkthecontinuityofallwiresfromthetransmittertothesensor.
10.11Checkgrounding
Prerequisites
Youwillneedacopyofyoursensorinstallationmanualandyourtransmitterinstallationmanual.
Procedure
Refertothesensorandtransmitterinstallationmanualsforgroundingrequirementsandinstructions.
10.12Checkforradiofrequencyinterference
Performtheactionsdescribedhereifyoususpectyourfrequencyordiscreteoutputisbeingaffectedby
radiofrequencyinterference(RFI).PossiblesourcesofRFIincludeasourceofradioemissions,ora
largetransformer,pump,ormotorthatcangenerateastrongelectromagneticeld.
Procedure
•EliminatetheRFIsource.
•Movethetransmitter.
•Useshieldedcableforthefrequencyoutput.
•Terminatetheshieldingattheoutputdevice.Ifthisisimpossible,terminatetheshieldingat
thecableglandorconduittting.
•Donotterminatetheshieldinginsidethewiringcompartment.
•360-degreeterminationofshieldingisunnecessary.
ConfigurationandUseManual
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