Wiring the 9739 MVD transmitter to the sensor
Wirethetransmittertothesensorusingjacketedcable
Prerequisites
ForATEXinstallations,thejacketedcablemustbeinstalledinsideauser-suppliedsealedmetallicconduitthatprovides
360°terminationshieldingfortheenclosedcable.
Sensorwiringisintrinsicallysafe.Tokeepsensorwiringintrinsicallysafe,keepthesensorwiringseparatedfrom
powersupplywiringandoutputwiring.
Keepcableawayfromdevicessuchastransformers,motors,andpowerlines,whichproducelargemagneticelds.
Improperinstallationofcable,cablegland,orconduitcouldcauseinaccuratemeasurementsorowmeterfailure.
Installcableglandsinthe9–wireconduitopeninginthetransmitterhousingandthesensorjunctionbox.Ensure
thatthecabledrainwiresandshieldsdonotmakecontactwiththejunctionboxorthetransmitterhousing.
Improperinstallationofcableorcableglandscouldcauseinaccuratemeasurementsorowmeterfailure.
Improperlysealedhousingscanexposeelectronicstomoisture,whichcancausemeasurementerrororowmeter
failure.Installdriplegsinconduitandcable,ifnecessary.InspectandgreaseallgasketsandO-rings.Fullyclose
andtightenallhousingcoversandconduitopenings.
Procedure
1.Installdriplegsinconduit,ifnecessary.
2.Runthecablethroughtheconduit.Donotinstall9-wirecableandpowercableinthesameconduit.
3.Topreventconduitconnectorsfromseizinginthethreadsoftheconduitopenings,applyaconductiveanti-galling
compoundtothethreads,orwrapthreadswithPTFEtapetwotothreelayersdeep.
Wrapthetapeintheoppositedirectionthatthemalethreadswillturnwheninsertedintothefemaleconduit
opening.
4.Atboththesensorandtransmitter,dothefollowing:
a.Removethejunction-boxandtransmitterhousingcovers.
b.Connectamaleconduitconnectorandwaterproofsealtotheconduitopeningfor9-wire.
c.Passthecablethroughtheconduitopeningforthe9-wirecable.
d.Insertthestrippedendofeachwireintothecorrespondingterminalatthesensorandtransmitterends,matching
bycolor(seeTable4-2).Nobarewireshouldremainexposed.
Note
ForELITE
®
,H-Series,T-Series,andsomeF-Seriessensors,matchthewiretotheterminalbythecoloridentied
ontheinsideofthesensorjunctionboxcover.SeeSensorandtransmitterterminalsforillustrationsidentifying
thevarioussensorand9739MVDtransmitterterminals.
14 Micro Motion 9739 MVD Transmitters