Omega LVU-201A Owner's manual

Brand: Omega

Model: LVU-201A

Category: Processors

Type: Owner's manual

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INTRODUCTION/TABLEOFCONTENTS StepOne

Anultrasonicsoundwave is pulsed twotimespersecondfromthebaseof the transducer.Thesoundwave

reflects against the process medium below and returns to the transducer.The microprocessor based

electronics measure the time of flight between the sound generation and receipt, and translates this figure

intothedist

ancebetweenthetransmitterandprocessmediumbelow.

TableofContents

Specifications/Dimensions:....................................................................................................................................................4

Components:.............................................................................................................................................................4

SafetyPrecautions..................................................................................................................................................................5

 MakeaFail‐SafeSystem:..........................................................................................................................................5

Menu/Definitions..................................................................................................................................................................6

Programming: ......................................................................................................................................................................8

 StepsforBasicConfiguration:...................................................................................................................................8

 SelectingUnitsofOperation:....................................................................................................................................8

 ConfigureSensor’sCurrentRange:...........................................................................................................................9

 SetOperationalRan

geUsingMAXR&MINR:.........................................................................................................10

Wiring ....................................................................................................................................................................11

Installation....................................................................................................................................................................12

 MountingGuide.......................................................................................................................................................12

 FittingSelection.......................................................................................................................................................13

TankAdapter...............................................................................................................................................13

Riser............................................................................................................................................................13

Flange..........................................................................................................................................................13

SideMountFitting......................................................................................................................................14

StandPipe...................................................................................................................................................14

Appendix: ....................................................................................................................................................................15

 Retur

ntoFactorySettings:.....................................................................................................................................15

 ChangeDisplayUnits:.............................................................................................................................................15

Troubleshooting:..................................................................................................................................................................16

 OtherHints:.............................................................................................................................................................17

 Testingthetransmitter:..........................................................................................................................................18

 UserSettings:..........................................................................................................................................................18

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4

SPECIFICATIONS/DIMENSIONS StepTwo

Range: 0.5to18feet(15cmto5.4m)

Accuracy: ±0.25%ofspaninair

Resolution: 0.125”(3mm)

Frequency: 50kHz

Pulserate: 2pulsespersecond

Beamwidth: 8°conical

Deadband: 0.5’(15cm)minimum

Blockingdistance: 0.5to18feet(15cmto5.4m)

Displaytype: 4segmentLCD

Displayunits: Inchorcm

Memory: Non‐volatile

Supplyvoltage: 12‐32VDC

Maxloopresistance: 900Ohms@32VDC

Signaloutput: 4‐20mA,12‐32VDC

Signalinvert: 4‐20mA/20‐4mA

Configuration: Pushbutton

Fail‐Safediagnostics: Revertto4mA,22mAor

remainsconstant

Temperaturerating: F:‐40°to140°

 C:‐40°to60°

Temp.compensation: Automaticoverentirerange

Pressurerating: 30psi(2bar)@25°C.,

derated@1.667psi(.113

bar)per°C.above25°C.

Enclosurerating: NEMA4X(IP65)

Enclosurematerial: Polypropylene(PP),U.L.94VO

Transducermaterial: PolyvinylideneFluoride

(PVDF)

Processmount: 2”NPT(2”G)

Conduitentrance: Single,1/2”NPT

CEcompliance: EN50082‐2immunity

 EN55011emission

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Components:

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P/N Max.Range DeadBand

LVU‐201A 18.0’(5.4m) 6”(15.2cm)

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SAPETYPRECAUTIONS StepThree

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

This manual includes information on all four versions of the continuous ultrasonic level transmitter from

OmegaEngineering, modelLVU‐201A.Pleaserefer tothe partnumber located on the sensor labelto verify

theexactmodelwhichyouhavepurchased.

User’sResponsibilityforSafety:OmegaEngineeringmanufacturesawiderangeofliquidlevelsensorsand

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

the user’s responsibility to select a technology 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:Becausethisisanelectricallyoperateddevise,onlyproperlytrainedstaff

shouldinstalland/or repair this product.Use a proper sealant with all installations.Never over tighten the

transmitterwithinthefitting.Alwayscheckforleakspriortosystemstart‐up.

Wiring and Electrical: A supply voltage of 12‐32 VDC is used to power  the LUV‐201A.The sensor system

shouldneverexceedamaximumof32VDC.Electricalwiringofthesensorshouldbeperformedinaccordance

withallapplicablenational,state,andlocalcodes.

TemperatureandPressure:TheLVU‐201Aisdesignedforuseinapplicationtemperaturesfrom‐40°C( ‐40

°F)to60°C(140°F),andforuseatpressuresupto30psi@25°C,derated@1.667psiper°Cabove25°C.

Material compatibility: The continuous ultrasonic level transmitter, LVU‐201A, is made of two materials.

The enclosure is of Polypropylene (PP) and the transducer is made of Polyvinylidene fluoride (PVDF).Make

surethatthemodelwhichyouhaveselectedischemicallycompatiblewiththeapplicationliquids.Whilethe

transmitterhousingisliquidresistantwheninstalledproperly,itisnotdesignedtobeimmersed.Itshouldbe

mountedinsuchawaythatitdoesnotnormallycomeintocontactwithfluid.

Flammable, Explosive and Hazardous Applications: DO NOT USE THE LVU201A GENERAL PURPOSE

TRANSMITTERINHAZADROUSLOCATIONS.

Makea Fail– SafeSystem: Design a fail–safesystem thataccommodatesthe possibility oftransmitter or

powerfailure.Incriticalapplications,OmegaEngineeringrecommendstheuseofredundantbackupsystems

andalarmsinadditiontotheprimarysystem.

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6

MENU/DEFINITIONS StepFour

Gettingaround:TheLVU‐201Aisconfiguredbytheuseoffourpushbuttons(UP,DOWN,MENUandSET)and

aLCDdisplay.The displaywillalwaysreadthedistancefromthebottomofthesensortothesurfaceofthe

liquid(airgap).

MainMenu:HoldingdowntheMENUbuttonwillscrolldownthemainmenuoftheLVU‐201A.

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Definitions:

EC4:Thisisthe4mAsettingfortheLVU‐201A.TheEC4isthedistancefromthebottomoftheLVU‐201Ato

the4mAsetpoint.Typically,theEC4or4mAsettingisatthebottomofthe

tank.Thefurtherawayfromthesensor,thelargerthenumberwillbe.This

settingismeasuredineitherinchesorcentimetersonthedisplay.

EC20:Thisisthe20mAsettingfortheLVU‐201A.TheEC20isthedistance

from the bottom of the LVU‐201A to the 20 mA set point.Typically, the

EC20or20mAsettingisatthetopofthetank.Theclosertothesensor,the

smaller the number will be.This setting is measured in either inches or

centimetersonthedisplay.

Reversingthe4‐20mAsignal:SettingtheEC4atthebottomofthetankand

EC20 at the top of the tank will create a 4‐20 mA output that has 4 mA at

emptyand20mAatfull.Toreversethe4‐20mAsignal,simplysetEC4atthetopofthetankandEC20atthe

bottomofthetank.

SAF1/SAF2/SAF3:Thisisthefail‐safesettingfortheLVU‐201A.UsetheSAF_settingtodetermine afail–safe

modeforthecurrentsignal.When[SAF1]isset,thecurrentwillincreaseto22mAifthesignalbecomesLOST.

When [SAF2] is set, the current will decrease to 4 mA if the signal becomes LOST.When [SAF3] is set, the

currentwillremainconstantifthesignalbecomesLOST.

LOST:ALOSTstatewilloccurwhenthesensordoesnotreceiveareturnsoundpulsesignal.Whenthis

occurs,thedisplaywillshowLOSTandthe curr

entoutputwilldefaulttotheSAF_setting.Thesensor

will remain in this condition until a valid signal is acquired.No values in the MENU can be changed

untiltheLOSTconditionhasbeenresolved.

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7

MENU/DEFINITIONS StepFour

FAST/SLOW:SettingforechoaveragingaswellasthereactiontimeforSAF_settingintheLVU‐201A:

FAST:Is the typical and default setting for the

LVU‐201A to operate.The LVU‐201A will

average 2 signal responses per second and

updateeverysecond.In FASTmode, the sensor

willcontinue to search fora valid readingfor 30

secondsbeforegoingintotheLOSTstate.

 SLOW:Is designed to help dampen out effects

causedbysevereturbulence.TheLVU‐201Awill

average signal returns over the preceding 10

seconds.In SLOW mode, the sensor will

continue to search for a valid reading for 2.5

minutesbeforegoingintotheLOSTstate.

TochangetheFAST/SLOWsetting,followthestepsbelow:

1. Hold[MENU]keyuntilFASTorSLOWappearsinthedisplay.

2. Release[MENU]keyandhold[SET]keytotogglebetweenFASTandSLOW.

3. Whendesiredsettingisreached,release[SET]key.Thelastdisplaysettingwillbelockedintomemory.

ALIN:Usethismodeasanaidtolevelingthesensorinstalledinaself‐aligningorrotationalbulkheadfitting.

DisplaywillshowthereturnsignalstrengthindB’s.Foroptimumalignment,firstenergizetheunitandreceive

a valid return signal.Then select the ALIN mode and adjust the LVU‐201A until the display is maximized.

Typicalreadingsrangebetween2and60dB’s.

ON/OFF:ThisistheactualactivationsettingforALINmode.Defaultis[OFF].Setto[ON]toviewtheALIN

readings.TheALINmodemustbeturned[OFF]whenalignmentiscompleted.

ToALINasensor,followthestepsbelow:

1. Hold[MENU]keyuntilOFFappearsinthedisplay.

a. OFFwillappearrightafterALIN

2. Release[MENU]keyandimmediatelyhold[SET]keytotogglefromOFFtoON.

3. Release[SET]key.TheLVU‐201AisnowinALINmode.

4. Adjustthesensorsothedisplayshowsthelargestvalue.

a. Whenthehighestvalueisshown,lockthesensorinplace.

5. ToexitALINmode,repeatsteps1‐4changingfromONtoOFF.

MAXR:The MAXR se

ts the maximum tank height and will  filter out all returns greater that this value.

Regardless of how the EC4 and EC20 are set, set MAXR to the Empty tank

distanceorgreater.

(VALUE):The number after MAXR shows the setting for MAXR.This value is

the actual MAXR setting that can be changed for the application.The

maximumdistanceis216.0inches.

MINR:TheMINRvalueisthedeadbandclosesttothetransducerfacewhere

nosignalwillbegenerated.TheMINRsetstheminimumdistancebetweenthe

liquid and the transducer.Regardless of how the EC4 and EC20 are set, set

MINRtotheFULLtankdis

tance.

(Value):ThenumberafterMINRshowsthesettingforMINR.Thisvalueisthe

actualMINRsettingthatcanbechangedfortheapplication.Theminimumdistanceis6.0inches.



8

PROGRAMMING StepFive

StepsforBasicConfiguration:

1. SelectandSettheunitsofoperation.

2. ConfiguretheSensor’sCurrentRangeusingtheEC4andEC20settingsinthemainmenu.

a. Thetankleveldoesnotneedtobeemptyorfullforthisoperation.

3. SettheOperationalRangeusingtheMAXRandMINRsettingsinthemainmenu.

a. Thetankleveldoesnotneedtobeemptyorfullforthisoperation.

4. SelecttheFail‐SafesettingusingtheSAF_settinginthemainmenu.

SelectingUnitsofOperation(InchesorCM):

The default for the  LVU‐201A is to display in inches.If power  is removed, the sensor will remain in the

selected mode.This operation selects the units of operation for the configuration of the transmitter.This

selection has no effect on the output of the sensor.The 4‐20 mA output  can be scaled to read in any

engineeringunits.

Tocha

ngetocentimeters Tochangetoinches



1. RemovepowertotheLVU‐201Aandwait10

seconds.

2. Simultaneouslypress[∆]and[SET]whileadding

powertothetransmitter.

3. TheLVU‐201Awillnowreadincentimeters.

1. RemovepowertotheLVU‐201Aandwait10

seconds.

2. Simultaneo

uslypress[]and[SET]whileadding

powertothetransmitter.

3. TheLVU‐201Awillnowreadininches.





9

PROGRAMMING StepFive

ConfiguretheSensor’sCurrentRangeusingEC4andEC20

EC4:

1. Measure the distance from the bottom of the sensor to the

desiredEC4setpoint.

2. Hold[MENU]keyuntilEC4appearsindisplay.

3. Release[MENU]keyandwaituntilavalueappears.

a. The value that appears is the current distance from the

sensortothesurfaceoftheliquid.

4. Immediatelypress the [∆] or [] keys to view the memory value

forEC4.

5. Usethe[∆]or[]keystoraiseorlowerthedisplaytothedesired

value.

a. Ifthekeysremainuntouchedformorethan3seconds,the

sensorwillexitthemenu.

6. Pressthe[SET]keytoenterthisvalueasthenewEC4setpoint.

EC20:

1. MeasurethedistancefromthebottomofthesensortothedesiredEC20setpoint.

2. Hold[MENU]keyuntilEC20appearsindisplay.

3. Release[MENU]keyandwaituntilavalueappears.

a. Thevaluethatappearsisthecurrentdistancefromthesensortothesurfaceoftheliquid.

4. Immediatelypressthe[∆]or[]keystoviewthememoryvalueforEC20.

5. Usethe[∆]or[]keystoraiseorlowerthedisplaytothedesiredvalue.

a. Ifthekeysremainuntouchedformorethan3seconds,thesensorwillexitthemenu.

6. Pressthe[SET]keytoenterthisvalueasthenewEC20setpoint.



10

PROGRAMMING StepFive

SetOperationalRangeusingMAXRandMINR

MAXR:

1. Measurethedistancefromthebottomofthesensortothedesired

MAXRsetpoint.

2. Hold[MENU]keyuntilthevalueafterMAXRappearsinthedisplay.

a. ThisvalueisthecurrentMAXRsetting.

3. If this is acceptable, press [SET] to lock the value as the MAXR

setting.Ifnot,usethe[∆]or[]keystoraiseorlower thevalueto

thedesiredsetting.

4. Pressthe[SET]keytoenterthisvalueasthenewMAXRsetting.

MINR:

1. Measurethedistancefromthebottomofthesensortothedesired

MINRsetpoint.

2. Hold[MENU]keyuntilthevalueafterMINRappearsinthedisplay.

a. ThisvalueisthecurrentMINRsetting.

3. Ifthisisacceptable,press[SET]tolockthevalueastheMINRsetting.Ifnot,usethe[∆]or[]keys

toraiseorlowerthevaluetothedesiredsetting.

4. Pressthe[SET]keytoenterthisvalueasthenewMINRsetting.

SelecttheFail‐SafeSetting

SAF_:

1. Hold[MENU]keyuntilSAF1,SAF2,orSAF3appearsinthedisplay.

2. Release [MENU] key and hold [SET] key to toggle between SAF1,

SAF2andSAF3.

3. Whendesiredsettingisreached,release[SET]key.Thelastdisplay

settingwillbelockedintomemory.





11

WIRING–GENERALPURPOSE StepSix

TheLVU‐201Arequires12‐32VDCpowerwithatleastwith25mAsupplyinordertooperate.

WiringtotheLVCN‐51LevelController:





WiringtoaGenericLoopPoweredDisplay:



WiringtoaGenericPLC





12

INSTALLATION StepEight

The LVU‐201A should always be mounted perpendicular to the liquid.Make sure that the fitting and

transmitter threads are not damaged or worn.Always hand‐tighten the transmitter within the fitting.

Performaninstalledleaktestundernormalprocessconditionspriortosystemstartup.

MountingGuide

1. Donotmountatanangle

2. Liquidshouldneverenterthedeadband

3. SideWall‐UsetheBeamWidthdatatofindtheclosestthesensorcanbetothesidewall

4. Donotmountwhereobstacleswillintrudeonsensor’sbeamwidth

5. Donotmountinavacuum

6. Avoidmountinginthecenterofadometoptank.

7. Inconebottomtank,positionthesensoroverthedeepestpartofthetank.



DonotinstallLVU‐

201Aatanangle



AvoidInterference

fromsideoftank

Donotinstallwith

objectsinthebeam.

Donotinstallin

applicationswith

vacuum.



Installation in existing fittings:If the existing fitting is larger than the threads of the

LVU‐201A, select a reducer bushing such as LVU800‐2N80 (3”thread x 2”thread) or

LVU800‐3N80(4”threadx2”thread).

Beam Angle:LVU‐201A features an 8° beam angle.As the distance to the liquid

increases, the beam will increase in size.Keep any object that can interfere with the

soundpulsesoutsideofthisbeamangle.Usethedataprovidedtosizethefootprintof

thesoundpulse.

Depth Radius  Depth Radius Depth Radius

1’ 1.2” 7’ 6.2” 13’ 11.3”

2’ 2.1” 8’ 7.1” 14’ 12.1”

3’ 2.9” 9’ 7.9” 15’ 13.0”

4’ 3.7” 10’ 8.8” 16’ 13.8”

5’ 4.6” 11’ 9.6” 17’ 14.6”

6’ 5.4” 12’ 10.4” 18’ 15.5”



13

INSTALLATION StepEight

FittingSelection:LVU‐201Aiscommonlyinstalledintankadapters,flanges,bracketsorstandpipes.

1. TankAdapter:Selectatankadapter

fitting,suchastheLVU800‐2Bforthe

LVU‐201Aseries.

a. Avoidtankadapter(threadx

thread)stylesand/orpipestops

forwardoftheinstalled

transducer.

a. Forlargertankadapters,itis

OKtouseareducerbushing

suchastheLVU800‐2N80(3”

threadx2”thread).



2. Riser:Installationswithtall,narrowriserscanimpedetheacousticsignal.

a. 2”(5cm)diameterrisersshouldbenotallerthan3”(7.6cm).Largerdiameterrisersshouldbe

notallerthan12”(30.5cm).



RiserSpecifications

InnerDiameter MaximumHeight

3”~(75mm)

4”~(100mm)

5”~(125mm)

6”~(150mm)

7”~(175mm)

8”~(200mm)

3”~(75mm)

7”~(175mm)

10”~(250mm)

12”~(300mm)

14”~(350mm)

16”~(400mm)

Note:Donotexceedthedimensionslistedabove

3. Flange:Ifinstallingonaflange,selectaflangewithathreadthatisequaltothethreadoftheLVU‐

201A.

a. Whenusingaflangewithariser,pleaseobservetheriserdimensionalinformationabove.

b. Ifthe size of the flange is largerthan the thread of th

esensor, use a reducer bushing to help

mountthesensor.





2”TankAdapter

SocketxThread

TankAdapter

ThreadxThread



Donotusethreadxthread

14

INSTALLATION StepEight

4. SideMountBracket:Forinstallationsinopentanksandsumps,usethe

LVM‐30seriessidemountbracket.

a. Beawareofthe8°beamanglewiththeLVU‐201Atransmitter.

b. UsetheBeamWidthdatatoavoidhavingthesensor’sbeamaway

fromthesidewall.



5. StandPipe:Astandpipemaybeusedtodampenturbulenceorwhenfoamispresentinthe

application.

a. Pipecanbemadeofanymaterial.

b. Selectaminimum2”IDpipeforthestandpipe.

i. Alargerdiameterpipecanbeused.

c. UseacouplingandreducerbushingtoattachtheLVU‐201A

tothepipe.

d. Thepipelengthshouldrunthemeasurementspanandthe

bottomofthepipeshouldremainsubmergedatalltimesto

preventfoamfromenteringthepipe.

e. Thepipemustbeacontinuouslengthwithnojoints,

couplingsorextensions.

f. Cuta45°notchatthebottomofthepipeanddrilla

1/4”pressureequalizationholeinthedeadband.

i. Theventholemustbewithinthedeadbandofthe

LVU‐201A.

g. Thepumpsshouldnotdriveliquidpasttheopenendofthe

standpipewhichcausestheliquidinthepipetooscillate.





15

APPENDIX StepNine

ReturntoFactorySetting:TheLVU‐201Aispresetattimeofshipmentwiththe

Factory Settings listed below.If at any time you need to return to the Factory

Settings, remove power from the LVU‐201A and wait 10 seconds.Press the

[MENU] and [SET] buttons simultaneously while powering up the transmitter.

Note: If po wer  is cycled on and off or removed for a long duration  of time, the

configuration will not change.The only way to return to Factory Settings is  to

holdboththe[MENU]and[SET]buttonswhileapplyingpower.

FactorySettings:

EC4 216”(548.4cm) ON/OFF OFF

EC20 8”(20.3cm) MAXR N/A

SAF1/2/3 SAF1 value 216”(548.6cm)

FAST/SLOW FAST MINR N/A

ALIN N/A value 8”(20.3cm)

Changing Display Units: The LVU‐201A comes preset to measure in inches (default setting).To change the

display to show centimeters or to return to inches, flow the steps below.Note:If power is removed, the

sensorwillremainintheselectedmode.

Tochangetocentimeters Tochangetoinches



1. RemovepowertotheLVU‐201Aandwait10

seconds.

2. Simultaneouslypress[∆]and[SET]whileadding

powertothetransmitter.

3. TheLVU‐201Awillnowreadincentimeters.

1. RemovepowertotheLVU‐201Aandwait10

seconds.

2. Simultaneouslypress[]and[SET]whileadding

powertothetransmitter.

3. TheLVU‐201Awillnowreadininches.





16

TROUBLESHOOTING StepTen

PROBLEM  SOLUTION

Transmitteroutputs

currentof0mA

Check the wiring for an open circuit.An open circuit is the most

commonissuewitha0mAsignal

Transmitterjumpstoa

currentoutputbetween19

and20mA

Check the installation of the transmitter.Bad installation fittings will

cause false signals near the top of the tank, which typically translates

to a signal between 19 and 20 mA.Also look for interference just

belowthetransmitter.

Transmitteroutputsa

currentover22mA

Immediately check the wiring for a short circuit.The LVU‐201A is

current limited to 22 mA.Anything above 22 mA indicates a short

circuit.

Transmitteralwaysjumps

toLOSTcondition

A reading of LOST in the display of the LVU‐201A indicates the

transmitterisnotreceivinga validreturnsignal.IfLOSTappears,please

checkthefollowingtroubleshootingitems:

1. Beamconeinterferencesuchasthesidewall,ladder,seams,rungs

orpipeswithintheLVU‐201A’sbeamcone.

2. ProperinstallationsuchthattheLVU‐201Aisinstalledlevelandfree

frominterferencefromtheinstallationfittingorflange.

3. Sufficient power being supplied to the LVU‐201A.The LVU‐201A

requires12‐32VDCwithaminimumsupplyof25mA.

4. Proper Programming of the MAXR or MINR function. For best

results,set theMAXR function asthedistance from the bottom of

the tank to the bottom of the transmitter. Also set the MINR

distanceabovethehighestlevelinthetank.DonotsettheMINRto 

lessthan6inches.

5. Makesuretha

tthetransmitter isnotinstalledatanangle.Evena5

degreeoffsetcanreducethesignalreturnstrengthgreatly.

Outputoftransmitteris

oppositeofthelevelof

liquid

Check the EC4

EC20 Setting.  For 4mA at empty tank and20 mA at

full tank, the EC4 must be the larger value and the EC20 to smaller

value.For20mAatemptytankand4mAatfulltank,theEC20must be

thelargervalueandtheEC4tosmallervalue.





17

TROUBLESHOOTING StepTen



PROBLEM  SOLUTION

Thedisplayonthe

transmitterdoesnot

matchthedisplayonthe

sideofthetank

The display for the LVU‐201A will always show the distance from the

liquidsurfacetothebottomofthesensor(ininchesorcm).The4‐20

mA output can be scaled to read in any engineering units, thus the

displayswillnevermatchunlessthelocal displayisconfiguredtoread

theairgapinthetank.

Sensorappearstohave

resetitself

CheckthesettingsforEC4&EC20.Rememberthatthefirstvalueseen

inEC4&EC20isthecurrentdistancefromthesensortotheliquid.

1. TocheckEC4setting:

a. PressMENUuntilEC4appears.

b. Waituntilanumberappears.

c. Immediatelypressthe∆button&theEC4settingwillappear.

2. TocheckEC20setting:

a. PressMENUuntilEC20appears.

b. Waituntilanumberappears.

c. Immediatelypressthe∆button&theEC20settingwillappear.

DisplayreadsCM8Qor

CM8O

These are actually firmware codes for the sensor.The appearance of

eithercode indicates that the sensor is stuck in a reboot stage due to

thepowerflickeringonandoff.Checkthatthepower beingsuppliedis

consistentanddoesnotflickeroff.Alsocheckthewireconnectionsat

theterminals.

Other Hints:Current must change with all level movement.Example: For the illustration below, as level

increases, the current output will increase. If the output of the LVU‐201A is always reading 4mA or 20mA,

checktheinputvaluesfortheLVU‐201A.

Thedisplayonthe LVU‐201Awillalwaysindicatethedistancefromthebottomofth

esensortothesurfaceof

theliquid.Astheliquidlevelincreases,thevalueonthedisplaywilldecrease.Astheliquidleveldecreases,

thevalueonthedisplaywillincrease.



18

TROUBLESHOOTING StepTen

TestingtheTransmitter



1. Ifinstalledinaclassifiedarea,removethesensorfromthehazardouslocation beforetesting.

2. Connectamultimeterinserieswiththeblackwiretoreadthecurrentoutput.

3. Verifythatthecurrentincreases(tankfilling)anddecreases(tankemptying)appropriatelyinthe

calibratedspan.

If not, carefully observe and attempt to correlate any installation, level or application event for more specific

troubleshootingdirection.



UserSettings:

Filloutthechartbelowandkeepasarecordofyourconfiguration.

CurrentRange

EC4= EC20=

LoopFail‐Safe(selectone)

SAF1(22mA) SAF2(4mA) SAF3(HoldLastValue)

OperationRange

MINR= MAXR=







19



20

Omega LVU-201A Owner's manual

Brand: Omega

Model: LVU-201A

Category: Processors

Type: Owner's manual

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Omega LVU-201A Owner's manual

Omega LVU-201A Owner's manual

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