Omega LVRD10 Series Owner's manual

2

 

3

INTRODUCTION SectionOne

The senor utilizes TDR (Time Domain Reflectometry) technology.  It is best described as low‐energy, high‐

frequencyelectromagneticimpulses,generatedbythesensor’scircuitrythatispropagatedalongtheprobeas

itisimmergedintheliquidtobemeasured.Impulseshitthesurfaceofthemediaandpartoftheimpulse

energy is reflected back up the probe to the circuitry.  Level Measurementiscalculatedfromthetime

differencebetweentheimpulsessentandtheimpulsesreflected.Thesensoranalyzestheleveloutputasa

continuousmeasurementreadingfromitsanalogoutput.TDR‐SensorsarealsoknownasGuidedRadarsor

GuidedWaveRadars(GWR).

NewFeatures

 Precisecontinuouslevelmeasurementinonedevice

 Completegalvanicinsulationofdeviceelectronicsfrom itsinputs/outputsandthetankpotential(no

problemswithelectrochemicalcorrosionprotection)

 Highly robust measurement due to 3‐wire design, innovative signal analysis and disturbance signal

suppression

TableofContents

Introduction: .........................................................................................................................................................3

 Specifications:..........................................................................................................................................4‐5

 Dimensions:.................................................................................................................................................6

 AboutthisManual:.....................................................................................................................................7

GettingStarted(SetupOverview):..........................................................................................................................8

 PartNumbers:.............................................................................................................................................9

 Probelength:.............................................................................................................................................10

 MeasurementRange:...............................................................................................................................13

 HeightofLiquidvs.VolumeofLiquid:......................................................................................................15

Installation(MountingConsiderations):...............................................................................................................16

 Installationtips:...................................................................................................................................18‐21

Wiring(AnalogOutput):........................................................................................................................................22

 CommonWiringtoDisplays,Controllers&PLCs:.....................................................................................24

Configuration:.......................................................................................................................................................25

 USBFobinterface:....................................................................................................................................25

 Sensorconfiguration:................................................................................................................................26

 Tankshapeselection:................................................................................................................................27

 DimensionalEntry:....................................................................................................................................27



 Tanklevelconfiguration:..........................................................................................................................28

 Writetounit:.............................................................................................................................................28

EmptySignalScan:................................................................................................................................................29

Appendix:..............................................................................................................................................................31

 EchoCurve:...............................................................................................................................................31

 Sensorconfiguration:...........................................................................................................................32‐34

 Tankshapeselection:...........................................................................................................................34‐35

 DimensionalEntry:...............................................................................................................................35‐36

 TankLevelConfirmation:..........................................................................................................................37

 Writetounit:.............................................................................................................................................38

 CuttingtheProbe:................................................................................................................................39‐41

 Troubleshooting:......................................................................................................................................42

Warranty/Disclaimer:...........................................................................................................................................43



4

INTRODUCTION SectionOne

Electrical

Analogoutput: 4to20mA,3‐wire

Totalloadresistance: <250Ω

Lowerrangevalue: 4.0mA(span0%)

Upperrangevalue: 20.0mA(span100%)

Responsetime: 5s

Supplyvoltage: 10to30VDC(reverse‐polarityprotected)

Currentconsumption:<50mAat24VDC

Start‐uptime: <6s

Cableterminals: terminalblockforwires16to26AWG(solidorstranded)



Measurement

Referencecondition:(dielectricconstant[εr]=80,watersurface,tank01m,DN200metalflange)

Accuracy: ±3mm

Repeatability: <2mm

Resolution: <2mm

Probetype:

 Rod: 4mm

 Cable: 4mm,type7x19

 Coaxial: 21.3mm(0.843”)½”pipe

Probelength StandardLengths

 Rod: LVRD11: 9.84’ (3.0m)

  LVRD11‐3FT: 3.0’ (0.91m)

  LVRD11‐6FT: 6.0’ (1.82m)

 Coaxial: LVRD12: 9.84’ (3.0m)

  LVRD12‐3FT: 3.0’ (0.91m)

  LVRD12‐6FT: 6.0’ (1.82m)

 Cable: LVRD13: 18.0’ (5.5m)

CustomProbe [canbeorderedin5mm(0.2”)incrementsfromthereferencepoint]

 Rod: 2’to9.8’ (0.61to3.0m)

 Cable: 3.3’to18’(1.0to5.5m)

 Coaxial: 2’to9.8’ (0.61to3.0m)

Probeloading

 Rod: Maximumlateralload: 6Nm…(0.2kgat3m)

 Cable: Maximumtensileload: 5kN

 Coaxial: Maximumlateralload: 100Nm…(1.67kgat6m)

Topdeadband: 100mm(4”)

Bottomdeadband: 50mm(2”)



ApplicationSpecifications

IntendedInstallation:

 Rod: Metallictankorbelowgradeconcretebasin

 Cable: Metallictankorbelowgradeconcretebasin

 Coaxial: Non‐metallic,plastic,fiberglassormetallictankorbelowgradeconcretebasin

Dielectric[εr] >1.8

Conductivity: norestrictions

Density: norestrictions

5

INTRODUCTION SectionOne

ApplicationSpecifications(continued)

Processtemperature 

 Rod: F:‐40°to302° C:‐40°to150°

 Cable: F:‐40°to302° C:‐40°to150°

 Coaxial: F:‐40°to266° C:‐40°to130°

Ambienttemperature

 Operation: F:‐13°to176° C:‐25°to80°C

 Storage: F:‐40°to185° C:‐40°to85°C

Applicationpressure: ‐14.5to250psi ‐1barto17.2bar

Rateoflevelchange: 1”/s



MechanicalSpecifications

Wettedmaterials:

 Rod: 1.4404/316LSS,PEEK

 Cable: 1.4404/316SS,PEEK

 Coaxial: 1.4404/316LSS,PEEK

Housingmaterials

Housingbodyandcover:  AluminumalloyENAC‐AlSi9Cu3(DINEN1706),epoxyspray

coating(~70μm)otheralloysandcoatingsonrequest.

covero‐ring: siliconerubber(ElastosilR750/50)

screws;coverlockingscrew; 1.4301/304externalearthterminal

screw: tinplatedstainlesssteel1.4301/304

Housingrating: IP66,NEMA4

Cableentries: Singlecableentry½”NPT

Cordgrip: ½”NPT,FerriteBeadincluded

Cordgripmat’l: Nylon

CordgripCable

 MinimumSize: 0.170”(4.3mm)

 MaximumSize: 0.450”(11.4mm) 

Processmount: ¾”NPT



Compliance: CE:EN61326‐1:2013&EN55011ClassAGroup1

 CRN

  RoHS 





6

INTRODUCTION SectionOne

Dimensions:



 Rod  Coaxial  Cable





7

INTRODUCTION SectionOne

AboutthisManual:PLEASEREADTHEENTIREMANUALPRIORTOINSTALLINGORUSINGTHISPRODUCT.

This manual includes information on theLVRD10 series Guided WaveRadarLevelTransmitterfromOmega

Engineering®.  Please refer to the part number located on the switch label to verify the exact model

configuration,whichyouhavepurchased.

User’s Responsibility for Safety:  Omega Engineering® manufactures a broad range of level sensing

technologies.Whileeachofthesesensorsisdesignedtooperatein a wide variety ofapplications, itis the

user’sresponsibilitytoselectasensormodelthatisappropriatefortheapplication,installitproperly,perform

tests of the installed system, and maintain all components.  The failure to do so could result in property

damageorseriousinjury.

ProperInstallationandHandling:Onlyprofessionalstaffshouldinstalland/orrepairthisproduct.Never

overtightenthesensorwithinthefitting.Alwayscheckforleakspriortosystemstart‐up.

WiringandElectrical:Asupplyvoltageof10to30VDCisrequiredtopowertheLVRD10Series.Electrical

wiring of the transmitter should be performed in accordance with all applicable national, state, and local

codes.

MaterialCompatibility:Theenclosureismadeofmetal.Makesurethatitischemicallycompatiblewith

theapplicationmedia.

Enclosure:Whilethesensorhousingisliquid‐resistanttheLVRD10Seriesisnotdesignedtobeoperational

whenfullyimmersed.Itshouldbemountedtoinsuretheenclosuredoesnotcomeintocontactwiththe

applicationmediaundernormaloperationalconditions.Theprobeisdesignedforfullliquidcontact.

HandlingStatic‐SensitiveCircuits/Devices:Whenhandlingthetransmitter,thetechnicianshouldfollow

these guidelines to reduce any possible electrostatic charge build‐up on the technician’s body and the

electronicpart.

1. Alwaystouchaknowngoodgroundsourcebeforehandlingthepart.Thisshouldberepeatedwhile

handlingthepartandmorefrequentlyaftersittingdownfromastandingposition,slidingacrossthe

seatorwalkingadistance.

2. Avoidtouchingelectricalterminalsofthepartunlessmakingconnections.

3. DONOTopentheunitcoveruntilitistimetocalibrate.

MakeaFail‐SafeSystem:  Designa fail‐safe systemthat accommodatesthe possibility of switchand/or

powerfailure.OmegaEngineering®recommendstheuseofaredundantbackupsystemandalarminaddition

totheprimarysystem.

Flammable,ExplosiveorHazardousApplications:TheLVRD10Seriessensorisnotcertifiedforapplication

inahazardouslocations.

 

8

GETTINGSTARTED SectionTwo

SetupOverview

Belowhighlightstheinitialstepsinsettingupyoursensorforoperation.

1. CheckPartNumber(SectionTwo)

a. Confirmthatthesensor’spartnumbermatchestheorderedpartnumberandallcomponents

areprovidedwiththemodeldelivered.

2. MeasureProbe&Installation(SectionTwo)

a. Priortoinstallation,measurethelengthoftheprobe.Confirmthattheprobelengthmatches

theactualinstallationlocation.

b. Iftheprobelengthistoolong,refertoCuttingtheProbeinSection8.

c. Understand the location of the sensor’s Measurement Rangeas well as MinimumFill‐Height

andMaximumFill‐Heightsettings.

3. Installthesensor(SectionThree)

a. Section3containsinformationonthelocationandmechanicalinstallationofthesensor.

4. Wirethesensor(SectionFour)

a. Section4containsinformationonelectricalwiringandpowerrequirementsforthesensor.

5. ConfigureSensorwithLVCN414‐SWSoftware(SectionFive)

a. Section5containsinformationonusingtheLVCN414‐SWconfigurationsoftware.

6. PerformanEmptyScan(SectionSix)

a. Section6containsinformationonhowtorunanemptyscan.

b. Anemptyscanmaynotberequiredonasensorthathasacoaxialprobe.





9

GETTINGSTARTED SectionTwo

Components:LVRD10Seriesisofferedin12differentmodels.Dependingonthemodelpurchased,youmayor

maynothavebeenshippedtheconfigurationcomponentshownbelow.

Part

Number

Maximum

Range

Probe

Style

Probe

Mat’l

Thread

Fob

Included

Components

LVRD11‐B

9.8’

(3m)

Rod 316LSS ¾”NPT

No

Housing,feed‐through,

rodstyleprobe

LVRD11 Yes

LVRD11‐3FT‐B

3.0’

(0.91m)

No

LVRD11‐3FT Yes

LVRD11‐6FT‐B

6.0’

(1.82m)

No

LVRD11‐6FT Yes

LVRD11‐B

9.8’

(3m)

Coaxial 316LSS ¾”NPT

No

Housing,feed‐through,

coaxialstyleprobe



LVRD11 Yes

LVRD11‐3FT‐B

3.0’

(0.91m)

No

LVRD11‐3FT Yes

LVRD11‐6FT‐B

6.0’

(1.82m)

No

LVRD11‐6FT Yes

LVRD13‐B

18.0’

(5.5m)

Cable 316SS ¾”NPT

No

Housing,feed‐through,

cablestyleprobe



LVRD13 Yes



 Coaxial style probe

 ‐ includes rod, threaded

½”pipeandspacers

 Cablestyleprobe

‐includescounterweight

 Manual





10

GETTINGSTARTED SectionTwo

UnderstandingSensorHeight

ThisisacriticalsettingforLVRD10Series.SensorHeightdefinestheheightofthesensorabovethebottomof

thetank.Theheightvaluemusttakeintoaccounttheshapeofthetankandanyrisers,fittings,structuresor

extensions associated with the tank or the installation (see examplesbelow).Thereferencepointfor

definitionoftheSensorHeightisalwaysthebottomofthemountingnut.

Simple

Tank

DomeTopRaises

SensorHeight(SH)

SensorOffCenter

ChangesSH

SimpleOpen

TopTank

SensorExtendsinto

SumpLoweringSH







ConeBottomRaises

SensorHeight

MountingFixture

RaisesSensorHeight

Simple

Tank

RiserRaises

SensorHeight



 

UnderstandingProbeLength

Thereferencepointfordefinitionoftheprobelength[Length]isalwaysthebottomofthethreads[bottomof

thefeedthrough(seebelow)].Note:ThisisadifferentreferencelocationfromtheSensorHeight.Theprobe

Lengthisanimportantmechanicaldimensionwhichisneededtomakesuretheprobephysicallyfitsintothe

tankattheanticipatedmountinglocation.Probelengthhasaninfluenceontheactualmeasuringrangeofthe

sensor,butitisadifferentaspectofthesensor.



RodProbe

(LVRD11Series)



CoaxialProbe

(LVRD12Series)



CableProbe

(LVRD13Series)

Note:SensorHeightandProbeLengthhavedifferentreferencepointsformeasurement.

11

GETTINGSTARTED SectionTwo

UnderstandingInstallLocationLength

Measurethespacebelowtheactualinstallationlocationforthesensor.Thisdistance(installlength)mustbe

greaterthantheprobelength.Inmanytanks,theinstalllengthcorrespondstotheheightofthetank.With

dometop,conebottomandhorizontaltanks,includetheaddedheightofthecurvedsurface.Besuretotake

intoaccounttheheightoffittings,risers,tankflatsetc.whichmaybeaddedforinstallation.Alloftheabove

canraisethebottomoftheprobehigherinthetankthanwhatwasoriginallyexpectedresultinginareduced

lowestlevelofmeasurement(seeMeasurementRange).

TankwithFlatTop

&FlatBottom

TankwithDomeTop

&FlatBottom

Horizontal

Tank



DomeTopsandConeBottoms

ThelocationofanLVRD10Seriesinstalledalongthetopofadome top tank may have an effect on the

installationofthesensor.Besuretomeasurefromtheactualpointofinstallation.Roundor conebottom

tankswillreducetheinstallheightavailable,dependingoninstalllocation.Ifthisoccurs,eitherthesensorcan

beraisedusingfittings(seeAddingaRisertoAvoidCuttingtheProbe)ortheprobe’slengthmaybereduced

bycuttingtheprobe(seeCuttingtheProbeinSection7).

InstallHeight>

ProbeLength

InstallHeight<

ProbeLength

InstallHeight>

ProbeLength





12

GETTINGSTARTED SectionTwo

AddingaRisertoAvoidCuttingtheProbe

Insomeconditions,arisermaybeaddedtoavoidcuttingtheprobe.



RodandCableProbes

WiththeRodandCableversionsof

theprobe,themaximumheightfor

the riser is 12” (300mm).  The

minimum diameter of the riser is

2”(50mm).Therisermustbe

metallic in construction using the

least number of fittings

/connections.  Note:AnEmpty

SignalScanisarequirementso

that the EchoWave® can eliminate

the odd geometry created by the

riser.

Leastnumberoffittings



ToomanyFittings



CoaxialProbes

Withthecoaxialprobe,thereisno

maximumriserheightorminimum

riserdiameter.Thisisbecausethe

coaxial shield isolates the physical

changes to the installation from

thesensor’senergysignal.Inboth

examples,theenergysignalcannot

see any changes to the

fitting/connections or from being

installed in an extension that

exceeds the maximum height for

rodandcableprobes.









13

GETTINGSTARTED SectionTwo

UnderstandingMeasurementRange

LVRD10Seriesleveltransmittershavesmalldeadbandareasatboththetopandbottomoftheprobe.Itis

duetothepresenceofunavoidablesignaldisturbancesatbothendsoftheprobe.Inthesedeadbandareas

the measurements are non‐linear or havereduced accuracy.  Therefore,itisnotrecommendedtoactually

measurelevelwithinthosedeadbandareas.Theirlengthdependsontheprobetypeandthereflectivity(i.e.

dielectricconstant)oftheliquidtobemeasured.



TheMeasurementRangeofLVRD10seriesextendsbetweenthetopand

bottomdeadbandareas;thisistheareainwhichasensorwillhavethe

specified measurement performance.  It is recommended that the

maximumandminimumlevelsto bemeasuredinthetankareactually

within the MeasurementRange of the sensor.  The span between the

lower range value [4mA] and the upper range value [20mA] of the

current output is proportionally equal from 0 to 100% of your

continuouslevelmeasurementreading.Itisrecommendedthatthe

span between these two range values stays within the Measurement

Range.

The[TopDeadBand],closesttothethreads,issetto4”(100mm).This

ismeasuredfromthebottomofthenutdowntotheprobe.Thisis

consistent for all styles of probe.  Note: the measurement location for

the Top Dead Band is different to the measurement location for the

probelength.

The [Bottom DeadBand],closesttotheendoftheprobe,issetto2”

(50mm).Thisismeasuredfromtheendoftheprobeonrodandcoaxial

probes.Forcableprobes,itismeasuredfromthetopofthecounter‐

weight.Thecounter‐weightmustbeincludedwiththedeadbandasthe

sensor’sinactivearea.





14

GETTINGSTARTED SectionTwo

UnderstandingMinimumFill‐Height(puttingitalltogether)

LVRD10SerieshasaMinimumFill‐Height(Min.Fill‐H),whichismeasured

fromthebottomofthetanktothetopoftheBottomDeadBand.As

shippedfromthefactory,Min.Fill‐Hiswherethe4mAcurrentislocated

andisthelowestpointontheprobewherethesensorcandetectaliquid

level.Anypointbelowthispositionwillstopat4mA.TheMin.Fill‐His

influenced by the Sensor Height (SH), Probe Length (P), Height of the

Threads[0.65”(16.5mm)]andBottomDeadBand.

Min.Fill‐H=(SH)–[0.65”(16.5mm)]–(P)+(BottomDeadBand)

 Withacableprobe,includetheheightofthecounter‐weight.

 SwitchoutputtovolumetricwillallowMin.Fill‐Htobesetto(0).

 Ifthe4‐20mAoutputisreversed(20mAatbottomand4mAat



top),thenthelevelwillmaxoutat20mAwhenthelevelfallsbelowtheMin.Fill‐H.

Note:Becauseofthebottomdeadband,theMinimumFill‐Heightcanneverbeattheendoftheprobe.

Note:  Theconfiguration ofthe sensor(Distance or Volume)will affect thecurrent outputat MinimumFill‐

Height.UponselectingDistance,thecurrentwillbesetto4mAatMinFill‐H.However,uponselectingvolume,

the current at Min Fill‐H will be the calculated based upon 4mA being set at the bottom of the tank [see

Distance(HeightofLiquid)vs.VolumeofLiquid].

UnderstandingMaximumFill‐Height

LVRD10 Series has a Maximum Fill‐Height(Max. Fill‐H),which ismeasuredfrom

thebottomofthetanktotheTopDeadBand.Asshippedfromthefactory,Max.

Fill‐H defines the 20mA current depicting the highest point on theprobe where

thesensordetectsliquid level.Anypointabovethispositionwillstopat20mA.

The Max. Fill‐H is influenced by the Sensor Height (SH), HeightoftheThreads

[0.65”(16.5mm)]andTopDeadBand.

Max.Fill‐H=(SH)–[0.65”(16.5mm)]–(TopDeadBand)

 TheMax.Fill‐Hmaybedecreasedtolowerthe20mAlocation,butit

cannotberaisedaboveitsoriginalsetting.

 Ifthe4‐20mAoutputisreversed(20mAatbottomand4mAattop),then

thelevelwillmaxoutat4mAwhenthelevelrisesabovetheMax.Fill‐H.



Note:Becauseofthetopdeadband,theMaximumFill‐Heightcanneverbeatthebottomofthethreads.



15

GETTINGSTARTED SectionTwo

Distance(HeightofLiquid)vs.VolumeofLiquid

WiththeLVCN414‐SWsoftware,theLVRD10seriescanbeconfiguredtooperateasadevicethatreadsthe

distance(heightofliquid)orvolumeofaliquid.Thelocationoftheemptycurrentwilladjustdependingon

which configuration method is selected.  Note:The empty (4mA) location is placed at a different location

baseduponselectingliquidheightorliquidvolume.

Distance(HeightofLiquid):WhentheLVRD10Seriesisconfiguredto

readtheheightoftheliquid,thedefaultforthesensorEmptywillbeat

the bottom of the measurement range (end of the probe minus the

bottomdeadband).Thisiswhere4mAwillbeset.Thedefaultfor

sensor Full will be at the top of the measurement range (Top Dead

Band),where20mAwillbeset.The20mAcanbesetbytheMaximum

Fill‐Height.

Volume of Liquid:WhentheLVRD10seriesisconfiguredtoreadthe

volumeofliquid,theoutputwilltrackthevolumeofthetankasthelevel

increasesanddecreases.LikeDistance,theEmptyandFullsettingswill

defaulttothelowandhighendoftheMeasurementRange.The

location of the 20 mA can be adjusted with the Maximum Fill‐Height

settings.  However, the shape of the tank can influence the current

output,dependinguponthetankbeinglinearornon‐linear(seebelow).



LinearTankExample



Note: In the above illustration, 10” of liquid will

always be equal to 100 gallons of liquid (1” = 10

gallons).

Non‐LinearTankExample



Note: In the above illustration, 1” of liquid does not

equal10gallons.The10”atthebottomrepresentsa

rise of 62.8 gallons.  As a change between 10” and

20”representsanincreaseof109.6gallons(i.e.172.4

gallons–62.8gallons).





16

INSTALLATION SectionThree

LVRD10 series is mounted vertically into the tank via its connectionthread.Itisthen

screweddirectlyintoastandardthreadedtankconnection,i.e.tankadapter,bushing,weld‐

insocket,oritcanbescrewedintoaflangewhichisconnectedtoatanknozzle.

Thesensorshouldnotbeweldeddirectlyintothetank.Neithershouldflangesbewelded

ontothesensor.WeldingonthemetalpartsofLVRD10Serieswillcauseseriousdamageto

thetransmitter.

DonotliftorhandletheLVRD10seriesbyitsprobe

:thiswillcauseexcessivestressonthe

probeconnection.LVRD10Seriesshouldbehandledbythehexagonorthelowersectionof

thehousing.Donotscrewinthesensorbyitshousing.Itshouldbetightenedonlyviaits

hexagon(wrenchsize32mm).

Theend user has to ensure proper sealingof the sensor connection; based uponprocess

conditions, i.e. temperature, pressure and resistance against the process liquid’s

atmosphere.

ForNPTthreadconnections,pressure‐tightjointsrequireasealantdirectlyonthethreads.

Inthecasethatthesensorisdeliveredwithadetachedprobe(cableversiononly),attachtheprobeontothe

smallthreadedstudbelowthehexagon.Makesuretoavoidcrossthreadingormisaligningthethreads.

MountingConsiderations

Theprobesshouldbeinstalledsothattheyarenotdirectlyimpactedbyliquidsflowingoutofthefillinginlet.

They should neither touch nor sway towards other objects insidethetankorthetank/nozzlewalls;e.g.by

agitator or mixer swirls.  In applications with very strong fluid movements which can also cause excessive

lateral force on the probe, it is recommended to anchor the probe.  The anchoring fixtures are end user

supplied.







17

INSTALLATION SectionThree

MountingConsiderations(continued)

Therodandcableprobesaresuitableforaverywiderangeofapplicationsin

liquids.However,thesignalhasawiderdetectionradiusaroundtherod/cable.

Therefore,itismoreresponsiveformeasurementsignaldisturbancesthatare

overcome by a few Mounting Considerations (see below) as well as simple

configurationadjustmentstothesensor.Inmostcasesitisenoughtoactivate

and utilize the powerful LVRD10 series empty signal scan feature.Itworks

mostefficientlyonstationaryinterferencetargetsliketallandnarrownozzles

orclose‐byobjects.

In case a non‐stationary interference target is close to the rod probe, like slowly

rotating agitator blades causing problems with the measurement,itis

recommendedtousethecoaxialprobe.Inanycase,therodandcableprobes

shouldnevergetindirectcontactwiththetank/nozzlewallorotherobjectsinthe

tank.



Rod Cable Coaxial

nozzlediameter >2”(50mm) >2”(50mm) +

(1)



nozzleheight <12”(300mm) <12”(300mm) +

clearancetotankwallorotherinternalobjects >4”(100mm) >4”(100mm)

+

clearancebetweenprobeendandtankbottom >0.1”(2mm) >0.1”(2mm) +

diameterofbypasschamber/stillingwell >1”(25mm) >1”(25mm) +

(2)



metallictankorbelowgradeconcretebasin + + +

Non‐metallicorplastictank NR NR +

+ =recommended

(1)

 =enoughdiametertofitinthecoaxialtube(0.843”/21.3mm)

(2)

 =enoughdiametertofitinthecoaxialtube(0.843”/21.3mm)withallocatedroomaroundthe

probeforliquidflowthroughthebypasschamber/stillingwell

NR =NotRecommended

TherodprobeisalsotherecommendedprobetypeformountingtheLVRD10seriesintobypasschambersor

stillingwells.Inthiscase,plasticcenteringspacersareneededtopreventtheprobefromcontactingthewall.

The cable probe is recommended for installations in tall tanks where limited installation headroom is

available.Itsperformancecharacteristicsandmountingconsiderationsaresimilartotherodprobe.

Thecoaxialprobedoesnothaverestrictionsregardingmountingposition,tankconnection,proximitytothetank

walland other objects inside thetank.  The coaxial probe is recommendedfor installing LVRD10series into a

non‐metallictankoropenpit



18

INSTALLATION SectionThree

InstallationTips

TallandNarrowRisers

Rod and Cable probes can be installed in tall and narrow risers

underthefollowingcriteria:

 NozzleDiametermustbe>2”(50mm),

 NozzleHeightmustbe<12”(300mm),

 Risermustbemetallic,

 Anemptysignalscanisrequiredafterinstallation.

Coaxialprobesarenotaffectedbytallandnarrowrisers.



DifficultTankorRiserGeometries

RodandCableprobesmustfollowthecriteriabelow:

 Tall and Narrow Risers criteria must be

followed,

 Nozzlediameterremainsthesamediameter,

 NozzleDiameterdoesnotdecrease,

 NozzleDiametermaygetlarger,butaempty

signalscanisrequired.

Coaxialprobesarenotaffectedbytheshapeofthe

tankorthegeometryofthenozzleastheaboveisnot

applicable.



ClosetoSideWallorInternalObstructions

RodandCableprobesmustfollowthecriteriabelow:

 >4”(100mm)fromthesidewall,

 >4”(100mm)fromanyobjectsorobstructionswithinthe

tank,

 Aemptysignalscanmayberequiredafterinstallation.

Coaxialprobesarenotaffectedbythedistancefromtheside

wallorfromotherobjects/obstructionswithinthetank.



MovingProbe

RodandCableprobesmustfollowthecriteriabelow:

 Avoid applications where the movement of the tank will cause the

probetoswingortouchobjectsandobstructionsinthetankortheside

wallofthetank.

 Avoidapplicationswherethetankistruck/vehiclemounted.

Coaxialprobesarenotaffectedbythemovementofliquidwithinastationary

tank.





19

INSTALLATION SectionThree

InstallationTips(continued)

LiquidSpray

RodandCableprobesmustavoidanyliquidthatspraysorpours

ontotheprobe.

Coaxialprobesarenot affectedbyliquidspraying onpartsthat

are above the liquid surface.  However, avoid installing probe

whereliquidwillpourontotheprobe.



Non‐Stationaryobjects

RodandCableprobesfollowthecriteriabelow:

 >4”(100mm)fromanyobjectsorobstructionswithinthe

tank,

 Anemptysignalscanmayberequiredafterinstallation,

 Non‐stationaryobjectsmustnotbemovingwhenempty

signalscanispreformed.

Coaxial probes are not affected by the movement of non‐

stationaryobjects,suchasmixerbladesorpumpliftingchains.

Note:Allprobes(rod,cableandcoaxial)canbeaffectedbyany

liquidvortexcreatedbyamixer.



Measurementreadingsattheverytoporbottomofthetank

Rod and Cable probes do not have the outer tube and must

adheretoallmountingrequirements,specifically:

 >4”(100mm)fromanyobjectsorobstructionswithinthe

tank,includingthebottomofthetank,

 Criteriafordifficulttankorrisergeometriesmustbe

followed.

Coaxialprobescaneasilybemechanicallymountedtoensurethe

measurementofliquiduptoafulloremptytank.Becausethe

coaxial is encased within the outer tube, the sensor is self‐

containedsootherobjectsorobstructionsarenotanissue.This

makesraisingorloweringthesensorsimpleandstraightforth.





20

INSTALLATION SectionThree

InstallationTips(continued)

Non‐metallictanks

Unlike coaxial, rod and cable probes have no containment

mechanism.Thisenergymustbecontainedbythetankwall,

requiring that all rod and cable probe sensors be installed in

metallictanksorwithinbelowgradeconcretesumps.

Coaxial probes can be installed in any type of tank, including

non‐metallic tanks.  This is because the outer tube acts as an

insulatorpreventing thesensor’s energy emanatingbeyond the

probe.



StillingWells/BypassChambers

Installations within a stilling well or a bypass chamber are

recommendedwitharodprobe.Ametallicpipeisrequired.Acoaxial

probe can be used in a stilling well or bypass chamber if required.

Note:Neveruseacableprobewithinastillingwellorbypasschamber.

 Makesurethattheprobedoesnotcomeintocontactwiththe

innerwallofthestillingwellorbypasschamber

o Non‐metallicspacersmayberequiredtokeeptheprobe

withinthecenterofthestillingwellorbypasschamber

 Make sure the liquid is able to freely fill, empty and that no

residueremainswithinthestillingwellorbypasschamber.

 Allothermountingcriteriamustbeobserved

 Aemptysignalscanmayberequiredafterinstallation



Limitedheadroom

Wheninstallinginatankwherethereislimitedspaceabovethetopof

the tank, the cable probe is the recommended solution.  The cable

probedesignallowsfortheprobetobeinstalledthroughasmallspace

abovethetank.

Therodandcoaxialprobesmaybeinstalledaslongastheprobesare

notdamagedorbentandaslongasthesensorisnotheldbytheprobe

(sensormustbeheldbythehead).

 Allothermountingcriteriamustbeobserved.





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Omega LVRD10 Series Owner's manual

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