Dwyer ULSL User manual

Type
User manual

This manual is also suitable for

LULS
RevA MN890570 1of30
SeriesULS
SmallTankUltrasonicTransmitter,SwitchandController
SeriesULSS,ULSM,ULSLManual
DwyerInstrumentsInc.
102IndianaHwy.212
(P.O.Box373)
MichiganCity,IN46360(46361)USA
www.DwyerInst.com
2of30 MN890570 RevA
INTRODUCTION/TABLEOFCONTENTS StepOne
SeriesULSisaninnovativelevelsensorfamilythatreplacesfloat,conductanceandpressuresensorsthatfail
duetocontactwithdirty,stickingandscalingmediainsmall(<4’/1.25m)tomedium(<18’/5.5m)talltanks.
Appliedinskid,machine,toolandprocessapplications,thegeneralpurposesensorsareavailablewithsingle
andmultifunctioncapabilitiesincludingmeasurement,switchingandcontrol.
Features
SimpleconfigurationwithULSXCALsoftware,nomoretargetcalibration
AdjustableLoopFailSafe
EasytoreversemAoutput
Increasedoutputfiltering
TableofContents
Specifications:.........................................................................................................................................................3
Dimensions: .........................................................................................................................................................4
SafetyPrecautions:................................................................................................................................................5
Components:.........................................................................................................................................................6
GettingStarted:......................................................................................................................................................7
USBFobInterface:.....................................................................................................................................7
ULSXCAL: .........................................................................................................................................................8
Configuration:............................................................................................................................................9
TankLevels&RelayValues:.....................................................................................................................16
WritetoUnit&WiringDiagram:.............................................................................................................17
Wiring: .......................................................................................................................................................18
WireConnections:....................................................................................................................................18
SwitchInductiveLoads:............................................................................................................................19
Installation: .......................................................................................................................................................20
MountingGuide:......................................................................................................................................20
FittingSelection:......................................................................................................................................21
TankAdapter:...............................................................................................................................21
Riser:............................................................................................................................................21
Flange:..........................................................................................................................................22
SideMountFitting:......................................................................................................................22
StandPipe:...................................................................................................................................23
AdvancedFeature:...............................................................................................................................................24
Appendix: .......................................................................................................................................................26
UpdatingULSXCAL
Software:..................................................................................................................26
UpdatingTransmitterFirmware:.............................................................................................................27
Troubleshooting:..................................................................................................................................................28
FactoryDefaults:......................................................................................................................................28
SolutionTable:.........................................................................................................................................29
Maintenance&Repair:........................................................................................................................................30

Rev5 MN890570 3of30
SPECIFICATIONS StepTwo
Range: ULSS:49.2”(1.25m)
ULSM:9.8’(3.0m)
ULSL:18.0’(5.5m)
Accuracy: ULSS:0.125”(3mm)
ULSM:+/‐0.2%ofrange
ULSL:+/‐0.2%ofrange
Resolution: ULSS:0.019”(0.5mm)
ULSM:0.039”(1mm)
ULSL:0.079”(2mm)
Deadband: ULSS:2”(5cm)
ULSM:4”(10cm)
ULSL:8”(20cm)
Beamwidth: ULSS:2”(5cm)dia.
ULSM:2”(5cm)dia.
ULSL:3”(7.6cm)
Configuration: ULSXCAL®PC
WindowsUSB2.0
Memory: Nonvolatile
Supplyvoltage: 1228VDC
Consumption: 0.5W
Loopresistance:400Ohmsmax
Signaloutput: 420mA,twowire
Signalinvert: 420mAor204mA
Signalfailsafe: 4mA,20mA,21mA,22mAor
holdlast
Contacttype: (4)SPSTrelays
Contactrating: 60VA,1Amaximum
Contactfail
safe:
Powerloss:Holdlast,
Poweron:Open,closeorholdlast
Hysteresis: Selectable
Processtemp.: F:20°to140°
C:‐to60°
Temp.comp.: Automatic
Ambienttemp.: F:‐31°to140°
C:‐35°to60°
Pressure: MWP=30PSI
Enclosurerating: Type6Pencapsulated,corrosion
resistance&submersible(IP68)
Encl.material: Polycarbonate
Strainrelief
material:
Santoprene
Trans.material: PVDF
Cablejacket
material:
Polyurethane
Cabletype: 9conductor,shielded
Cablelength: 48”(1.2m)
Processmount: ULSS:1”NPT(1”G)
ULSM:1”NPT(1”G)
ULSL:2”NPT(2”G)
Mountgasket: FKM
Classification: Generalpurpose
Compliance: CE,RoHS

4of30 MN890570 RevA
DIMENSIONS StepThree
SeriesULSL SeriesULSM
SeriesULSS

Rev5 MN890570 5of30
SAFETYPRECAUTIONS StepFour
About this Manual:PLEASE READ THE ENTIRE QUICK START PRIOR TO INSTALLING OR USING THIS
PRODUCT.This manual includes information on the Series ULS Ultrasonic Level Switch, controller and
transmitterfromDwyerInstruments,Inc.Pleaserefertothepartnumberlocatedontheswitchlabeltoverify
theexactmodelconfiguration,whichyouhavepurchased.
User’s Responsibility for Safety:Dwyer Instruments, Inc manufactures a broad range of level sensing
technologies.Whileeachofthesesensorsisdesignedtooperateinawidevarietyofapplications,itistheuser’s
responsibilitytoselectasensormodelthatisappropriatefortheapplication,installitproperly,performtestsof
the installed system, and maintain all components. The failure to do so could result in property damage or
seriousinjury.
ProperInstallationandHandling:Onlyprofessionalstaffshouldinstalland/orrepairthisproduct.Install
thetransmitterwiththeincludedFKMgasketandneverovertightenthetransmitterwithinthefitting.Always
checkforleakspriortosystemstartup.
WiringandElectrical:Asupplyvoltageof12to28 VDCisusedtopowertheSeriesULS.Electricalwiringofthe
transmittershouldbeperformedinaccordancewithallapplicablenational,state,andlocalcodes.Note:Series
ULSuseslatchingrelays.Whenpowerisremovedtothesensor,therelayswillremainintheirlaststate.Ex:Ifthe
relayisenergized,whenpowerisremoved,therelaywillremaininanenergiz edstat e.
Material Compatibility:The enclosure is made of Polycarbonate (PC).The transducer is made of
PolyvinylideneFluoride(PVDF).Makesurethatthemodel,whichyouhaveselected,ischemicallycompatible
withtheapplicationmedia.
Enclosure: While the transmitter housing is liquidresistant the Series ULS is not designed to be
operationalwhenimmersed.Itshouldbemountedinsuchawaythattheenclosure andtransducerdonot
comeintocontactwiththeapplicationmediaundernormaloperationalconditions.
Safety
Installationshouldbedonebyproperlytrainedstaff
Supplyvoltageshouldneverexceedamaximumof28VDC
Makesurethesensorischemicallycompatiblewithyourapplication
Designafailsafesystemthataccommodatesthepossibilityofsensorand/orpowerfailure
Thissensorshouldnotbeusedinclassifiedhazardousenvironments
Make a FailSafe System:Design a failsafe system that accommodates the possibility of transmitter
and/orpowerfailure.DwyerInstruments,Increcommendstheuseofredundantbackupsystemsandalarms
inadditiontotheprimarysystem.
Flammable,ExplosiveorHazardousApplications:SeriesULSshouldnotbeusedwithinclassified
hazardousenvironments.
Warning:AlwaysusetheFKMgasketwheninstallingtheSeriesULS,andmakesurethatallelectrical
wiringoftheswitchisinaccordancewithapplicablecodes.
6of30 MN890570 RevA
COMPONENTS StepFive
SeriesULSisofferedindifferentmodels.Dependingonthe modelpurchased,youmayormaynothavebeen
shippedallthecomponentsshownbelow.Youdohowever,needaSeriesULS,USBFobandFKMgasketto
configure,installandoperateSeriesULS.
FKMGasket
o ULSACCSGKusedwithULSSseries
o ULSACCMGKusedwithULSMseries
o ULSACCLGKusedwithULSLseries
USBFob
o Part#ULSACCUSB
QuickStartGuide
*Outputs
1. 420mA,looppoweredoutput
2. 4SPST60VArelays

P/N Max.Range DeadBand Thread Fob *Outputs
ULSS10 4.1’(1.25m) 2”(5cm) 1”NPT NoFob 1,2
ULSS11 4.1’(1.25m) 2”(5cm) 1”NPT FobIncluded 1,2
ULSS20 4.1’(1.25m) 2”(5cm) 1”G NoFob 1,2
ULSS21 4.1’(1.25m) 2”(5cm) 1”G FobIncluded 1,2
ULSM10 9.8’(3.0m) 4”(10cm) 1”NPT NoFob 1,2
ULSM11 9.8’(3.0m) 4”(10cm) 1”NPT FobIncluded 1,2
ULSM20 9.8’(3.0m) 4”(10cm) 1”G NoFob 1,2
ULSM21 9.8’(3.0m) 4”(10cm) 1”G FobIncluded 1,2
ULSL10 18.0’(5.5m) 8”(20cm) 2”NPT NoFob 1,2
ULSL11 18.0’(5.5m) 8”(20cm) 2”NPT FobIncluded 1,2
ULSL20 18.0’(5.5m) 8”(20cm) 2”G NoFob 1,2
ULSL21 18.0’(5.5m) 8”(20cm) 2”G FobIncluded 1,2
Rev5 MN890570 7of30
GETTINGSTARTED StepSix
SeriesULSisconfiguredthroughULSXCAL,aPCsoftwareprogram.ULSXCALisafreedownloadfromDwyer
Instrument,Inc’swebsite.YoumustdownloadandinstallULSXCALpriortopluggingintheUSBFob.Please
go to http://www.DwyerInst.com/software, click on ULSXCAL.Please observe the following requirements
fortheULSXCALsoftware:
ULSXCALSystemRequirements
Windows(R)2000,Windows(R)XP,Windows
Vista(R),Windows(R)7
32or64bitoperatingsystem
1USB2.0port
10mBharddrivespace
256mBRAM
Internetconnection
USBFobInterface:TheSeriesULScommunicateswith ULSXCALthroughaUSBinterface(p/n:ULSACCUSB)
calledaFob.BeforepluggingyourFobintoyourcomputer’sUSBport,besurethatyouhaveinstalledULSX
CALonyourcomputer.
Connectthered,green,whiteandblackwiresfromSeriesULSintothecorrectterminalsontheFob.Tighten
thescrewsontheterminalsandplugyourFobintotheUSBportofyourcomputer.
WiringidenticalforallseriesUseonlytheRed,Black,GreenandWhitewires.
ThemaximumcabledistancebetweenthecomputerandSeries
ULSis15’(4.6m).Thisonlyapplieswhen
configuringtheSeriesULS.
OnceSeriesULSisconfiguredandpriortoinstallation,isolatethewhiteandgreenwiresfromactivepower
topreventashortoftheconfigurationcircuit.
WhenusingtheFob,donotaddVDCpower.
TheFob,whenconnectedtothecomputer,willprovidethe
requiredpowertotheSeriesULS.
Windows(R)isaregisteredtrademarkofMicrosoftCorporation
WindowsVista(R)isaregisteredtrademarkofMicrosoftCorporation
8of30 MN890570 RevA
ULSXCAL StepSeven
WithSeriesULSconnectedtoyourcomputer,opentheULSXCALsoftwarebyclickingontheULSXCALicon.
Followsteps13toconfigurethetransmitter.Click“Help”inthelowerrighthandcornerandopenthehelp
menuofULSXCALforadditionalinstructionsonULSXCAL.IfyouneedadditionalassistanceusingULSXCAL,
pleasecontactaDwyerInstruments,IncApplicationsEngineerat(800)8729141.
AboveScreenCaptureisfortheSeriesULSS.

Rev5 MN890570 9of30
ULSXCALCONFIGURATION StepSeven
ThissectionofULSXCALiswhereyouselecttheapplication’sconfigurationsettings.Startfromthetopand
worktothebottom,choosingtheselectionsthatareapplicabletoyourconfiguration.Not Applicablewill
automaticallyshowwhenaselectiondoesn’tapplytoyourconfigurationsettings,andyoumaymoveon.All
configurationsettings mustbeselectedorhave Not Applicablebefore youcan continueto the nextstep.
Note:PressingtheClearScreenbuttonwillresettheconfigurationtableandallowaccesstoallofthefeatures.
NumberofPumps:Thisfeatureallowsyoutoselectthenumber
of
pumpsorvalvesusedwithSeriesULS.Thisisthesettingthatactivates
thecontrolcapabilitiesofuptotworelays.Controlrelaysareoften
referredtoaslatchingrelays.
o Switch/Alarms Only The relays will be standard single point
relays(Highand/orLowalarms).Relaysarenonlatching.
o 1‐ Pump/Valve One relay will be configured as a control or
latchingrelay (relaywillhave a start level anda separate stop
level).Use this setting to control one pump or valve for
automaticfillingoremptyingofatank.
o 2Pumps/Valves Two relays are
configured as control or
latchingrelays.Eachrelaywill havea unique startlevel anda
common stop level.Use this setting to control two pumps or
valvesforautomaticfillingoremptyingofatank.
o 420mATransmitterOnlyThissettingwilldisengageallofthe
relays.Use this function if you are not using any relays and
usingonlythe420mAcurrentoutput.
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

10of30 MN890570 RevA
ULSXCALCONFIGURATION(continued) StepSeven
Pump/ValveAction:Thisfeatureallowsyoutoselectifthepumpsor
valves will be used to automatically fill or empty the tank.For 2
Pump/Valve mode, both devices must be the same (automatic fill or
empty).Youcannotsetonerelayforfillandtheotherforempty.
o EmptiesTank Willsetrelay(s)toautomaticallyemptyatank.
StartlevelwillbeabovetheStoplevelforeachrelay.
o Fills Tank Will set relay(s) to automatically fill a tank.Start
levelwillbebelowtheStoplevelforeachrelay.
o Not Applicable Appears when
this function is not available
(such as when Switch/Alarms Only or 420mA Transmitters
Onlyareselected).
 
EmptiesTank FillsTank
(AutoEmpty) (AutoFill)
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

Rev5 MN890570 11of30
ULSXCALCONFIGURATION(continued) StepSeven
Pump/Valve Mode:This featureallowsyou to selectthe mode for a
control or latching relay.Pump/Valve mode is not active for
Switch/AlarmsOnlyor420mATransmitterOnly.
o SimplexAllowsfortherelaytobeusedasanautomaticfillor
empty.This is the default and only configuration when 1
Pump/Valveisselected.
o SimplexusedtoEmptyTank(example)
o Lead/LagAllowsforthetworelaystohaveuniquestartlevels
and a common stop level.The first relay will be identified as
the lead relay and thesecond relay as the lag.Each time the
lead level is reached, the first relay will always start.The lag
relaywillonlystartwhenthelaglevelisreached.Allrelayswill
stopatthecommonofflevel.
o Lead/LagusedtoEmptyTank(example)
o Duplex‐Allows for the two relays to have two different start
levels,acommonstoplevelandwillalternatetherelayswhen
the first start level is reached.The two relays will alternate
eachtimetheleadlevelisreachedandtheremainingrelaywill
start when the lag level is reached.All relays will stop at the
commonofflevel.
o DuplexusedtoEmptyTank(example)
o Not Applicable Appears when this function is not available
(such as when Switch/Alarms Only or 420mA Transmitters
Onlyareselected).
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

12of30 MN890570 RevA
ULSXCALCONFIGURATION(continued) StepSeven
RelayFailSafe:Thisfeatureallowsyoutoselectthefailsafestatefor
the relays.When the sensor regains signal, the output current will
revertbacktothecurrentlevelcondition.
o Relays Off ‐ The relays will revert to the OFF state.Appears
whenSwitch/AlarmsOnlyisselected.
o RelaysOn‐TherelayswillreverttotheONstate.
AppearswhenSwitch/AlarmsOnlyisselected.
o Hold State‐The relay(s) will remain in the same state as the
lastechodetected.Whenthesensorregainssignal, therelays
willreverttothelevelwhenthesignalwasregain.
o Pump/Valves Off ‐ The relays will revert to the OFF state.
Appearswhen1Pump/Valveor2Pumps/Valvesareselected.
o Pump/Valves On ‐ The relays will revert to the ON state.
Appearswhen1Pump/Valveor2Pumps/Valvesareselected.
o Not Applicable Appears when this function is not available
(suchaswhenTransmittersOnlyareselected).
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

Rev5 MN890570 13of30
ULSXCALCONFIGURATION(continued) StepSeven
Switch/Alarm Configuration:This feature allows you to select the
operationfortheswitches/alarms(usedasahighorlowalarm).This
settingadjuststhenumberofavailablerelaysbasedupontheprevious
settings.
o NoAlarmTurnsoffalloftheremainingrelays.
o High Alarm Options Set from 1 to 4 High Alarms (1High, 2
High,3High,4High).
o Low Alarm Options Set from 1 to 4 Low Alarms (1Low, 2
Low,3Low,4Low).
o Combination Alarms Set a combination of High and Low
Alarms (1Low 1High, 1Low 2High, 2Low 1High, 2Low 2
High,1Low3High,3Low1High).
o Not Applicable Appears when this function is not available
(suchaswhenTransmittersOnlyisselected).


HighAlarmOptions LowAlarmsOptions CombinationAlarms
(4High) (4Low) (2Highand2Low)
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

14of30 MN890570 RevA
ULSXCALCONFIGURATION(continued) StepSeven
Switch Hysteresis/Dead band:This feature allows you to select a
hysteresisordeadbandfortheremaininghighand/orlowalarms.
o Optionsfor Hysteresis/Dead bandNo Hysteresis,¼”,½”,1”,
2”,½cm,1cm,2cm,5cmorNotApplicable.
o High Alarms Relay activates above set point.Relay will
deactivatewhenlevelgoesbelowthesetpointplusthevalueof
thehysteresis.
o Low Alarms Relay activates below set point.Relay will
deactivatewhenlevelgoesabovethesetpointplusthevalueof
thehysteresis.

High
Alarmw/Hysteresis LowAlarmw/Hysteresis
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

Rev5 MN890570 15of30
ULSXCALCONFIGURATION(continued) StepSeven
Loop FailSafe:This feature allowsyou to select the failsafe current
output if the sensor fails to detect a return signal. When the sensor
regainssignal, the output currentwill revertback to thecurrent level
condition.
o Hold Last Value‐The output will remain in the same state as
thelastechodetected.Example:Iftheoutputwas6.7mAjust
prior to the lost signal, the device will continue to output 6.7
mA.Sensorwillindicatethelevelwhensignalwasregain.
o Empty‐ The output will revert to the current value for an
empty condition.When “4 mA at Bottom” is selected, the
sensor will output 4 mA when a failsafe condition occurs.If
“20 mA at Bottom” is selected, the sensor will output 20 mA
whenafailsafeconditionoccurs.
o Full ‐ The output will revert to the current value for a full
condition.When“4mAatBottom”isselected,thesensorwill
output 20 mA when afailsafe condition occurs.If “20 mA at
Bottom” is selected, the sensor will output 4 mA when a fail
safeconditionoccurs.
o Overfill(21mA)‐Theoutputcurrentwillgoto21mAwhenthe
returnsignalislost.
o Overfill(22mA)‐Theoutputcurrentwillgoto22mAwhenthe
returnsignalislost.
Outputat Empty:Thisfeatureallowsyoutoselecttheorientationof
the 4 to 20 mA output (4 to 20 mA or 20 to 4 mA).Choose which
output setting best fits the application.Typical installations are set
with 4 mA at Bottom.This will not affect the performance of the
sensor other than the output of the Series ULS.ULSXCAL’s factory
default is 4 mA at bottom and 20 mA at top. When connecting your
sensortoadisplay,youmustaccountforyouroutputsettings.
o 4 mA at Bottom‐The output current will be 4 mAwhen the
sensor measures an empty tank and 20 mA when the sensor
measuresafulltank.
o 20mAatBottom‐Theoutput
currentwillbe20mAwhenthe
sensor measures an empty tank and 4 mA when the sensor
measuresafulltank.
Note:Rightclickonanymenuthatyoumayhavequestionsontoopenthehelpmenu.
Note:Toreset,presstheClearScreenbutton.

16of30 MN890570 RevA
ULSXCALTANKLEVELS/WRITETOUNIT StepSeven
ULSXCAL‐TankLevels:ThissectionofULSXCALiswhereyouenterapplicationmeasurementvalues.This
appliestoallversionsoftheSeriesULS.YoumustentertheSensorHeightandFillHeightvalues.
For the Series ULSS, ULSM and ULSL, the Sensor Height and Fill Height values determine the
operationalrangeforthe420mAoutput.
SensorHeight: Distancefrom
thebottomofthetanktothe
bottomofthetransducer.
FillHeight:Distancefromthe
bottomofthetanktothe
maximumliquidheight.
ULSXCAL‐Relay Values:(Series ULSS, ULSM andULSL only):ThissectionofULSXCALiswhereyouenter
theoperationalvaluesforrelays.Youmustentervalueswithinallofthefieldsshown.Thevaluefieldsshown
are based upon the configuration of the Series ULS.All values must be in the units of operation selected
aboveandarebaseduponunitsofliquid.AllrelayvaluesmustbegreaterthanLiquidEmpty(0)andlessthan
LiquidFull(FillHeight).
Example: Thissampleshows4
High Level Alarms.As the
level increases from the
bottom –up, each alarm will
activateat4”increments.
Example:Thissampleshowsa
2Pump
Lead/Lag operation
with a High and Low alarm.
The pumps will automatically
empty the tank and the
alarmswillactivateifthelevel
getstoohighorlow.

Rev5 MN890570 17of30
ULSXCAL‐WRITETOUNIT StepSeven
After you have entered configurations and tank
values, click Write to Unit and send the
configurationtoyourSeriesULS.NowuseULSXCAL’s
file management features to saveyour configuration
by clicking Save Config File and print your wiring
diagrambyclickingWiringDiagram.”
WritetoUnit
Wiringdiagram
SaveConfigFile
WiringDiagram‐Sample
DiagramwillchangebasedupontheconfigurationoftheSeriesULS,
useULSXCALtoviewappropriatewiringdiagram.
WiringSeriesULS:OnceSeriesULShasbeeninstalled,followtheWiringDiagramprovidedbytheULSXCAL
software.A typical wiring diagram is shown above.Dwyer Instruments, Inc recommendsusing a qualified
licensedelectriciantowireSeriesULSandyourapplication’scomponents.
ConfigureyourSeriesULSwithULSXCALandusethewiringdiagrambutton toviewtheappropriate
diagram.Eachconfigurationwillhaveitsown unique diagram.Thediagramabove is only asample
andshouldnotbeusedasawiringdiagram.
Alwaysuse stepper relays between the sensor and externalloads.ForDCcircuitsuse a catchdiode
suchas1N4148,shownonthewiringdiagramshownaboveandsuppliedbyULSXCAL.
Once Series ULS is configured, isolate the white and green wires from active power to prevent a
shortoftheconfigurationcircuit.

18of30 MN890570 RevA
WIRING StepEight
WireConnections:
Red&Black:RedandBlackleadsareforconnectiontoa1228VDCpowersupplyortoa420mAlooppower
source(SeriesULSS,ULSM&ULSLonly).Theredandblackwirescanbeextendedupto1,000feetusinga22
gaugeorlargerwire,howeverdonotextendthegreenandwhitewires.
White & Green:White and Green leads arereserved for use with ULSXCAL and should not be connected
duringusage in the application.These wires should not beconnectedtoULSXCAL while power issupplied
fromanysourceotherthantheULSACCUSBFob.Themaximumcabledistancebetweenthecomputerand
SeriesULSis15’.
Neverallowthewhiteorgreenwirestotouchanypowersupply.
Blue,Orange,Yellow,Purple&Brown:Blue,Orange,Yellow&Purplewiresaretherelaycontacts(normally
open)fromeachoftherelays respectively.TheBrownwireisthecommonforalltherelays.Relayselectionis
determinedbytheconfigu r ationinULSXCAL.Note:SeriesULSuseslatchingrelays.Whenpowerisremovedto
the sensor, the relays will remain in their last state.Ex: If the relay is energized, when power is removed, the
relaywillremaininanenergizedst at e.
Generalnotesforelectricalconnections,usageandsafety:
Wherepersonalsafetyorsignificantpropertydamagecanoccurduetoaspill,theinstallationmust
havearedundantbackupsafetysysteminstalled.
Wiringshouldalways
becompletedbyalicensedelectrician.
Supplyvoltageshouldneverexceed28VDC.
Alwaysusestepperrelaysbetweenthesensorandexternalloads.ForDCcircuitsuseacatchdiode
suchas1N4148,shownonpreviouspage.
Protectthesensorfromexcessiveelectricalspikesbyisolatingthepower,wheneverpossible.
Thesensormaterialsmustbechemicallycompatiblewiththeliquidstobemeasured.
Designafailsafesystemforpossiblesensorand/orpowerfailure.
NeverusethesensorinenvironmentsclassifiedasHazardous.

Rev5 MN890570 19of30
WIRING StepEight
Switching Inductive Loads:The use of suppressors (snubbers) is strongly recommended when switching
inductiveloadstopreventdisruptingthemicroprocessor’soperation.Thesuppressorsalsoprolongthelife of
therelaycontacts.SuppressioncanbeobtainedwithacatchdiodeforDCcircuitsandaresistorcapacitor(RC)
forACcircuits.
CatchDiode
Alwaysusestepperrelaysbetweenthesensorandexternalloads.
ForDCcircuitsuseacatchdiodesuchas1N4148,shownonleft.
RefertothefollowingcircuitsforRCnetworkassemblyandinstallation:
ChooseRandCasfollows:
R:0.5to1Ohmsforeachvoltacrossthecontacts
C:0.5to1μFforeachampthroughclosedcontacts
Notes:
1. Usecapacitorsratedfor250VAC.
2. RCnetworksmayaffectloadreleasetimeofsolenoidloads.Check
toconfirmproperoperation.
3. InstalltheRCnetworkatthemetersrelayscrewterminals.AnRC
networkmayalsobeinstalledacrosstheload.Experimentforbest
results.
VoltageOutput:SeriesULScanbeusedasa0to5or0to10VDCoutputdevice.Aresistorwillneedtobe
addedtothecircuittoenableavoltageoutput(refertothewiringdiagrambelow).
05VDCoutput
o Adda250Ohmresistor
o Actualoutputwillbe0.8to5VDC
010VDCoutput
o Adda500Ohmresistor
o Actualoutputwillbe2to10VDC
WhenusingULSXCAL,underNumber
ofPumps,select420mATransmitterOnlytosimplifytheconfiguration
inULSXCAL.

20of30 MN890570 RevA
INSTALLATION StepNine
TheSeriesULSshouldalwaysbemountedperpendiculartotheliquidsurfaceandinstalledusingtheprovided
FKMmountinggasket.Makesurethatthefittingandtransmitterthreadsarenotdamagedorworn.Always
handtightenthetransmitterwithinthefitting.Performaninstalledleaktestundernormalprocessconditions
priortosystemstartup.Note:ThepreferredmountingfittingfortheSeriesULSS&ULSMistheULSACC121
(2”threadx1”thread)reducerbushing.
MountingGuide
1. Donotmountatanangle
2. Liquidshouldneverenterthedeadband
3. SideWall:
a. Mountat
least2”fromthesidewall
b. ForSeriesULSL‐mountatleast3”fromthesidewall
4. Donotmountwhereobstacleswillintrudeonsensor’sbeamwidth
a. SeeSpecifications,StepTwo
5. Donotmountinavacuum
6. Avoidmountinginthecenterofadome
toptank.
7. Inconebottomtank,positionthesensoroverthedeepestpartofthetank.
Donotinstallat
anglerelativetothe
liquid.
Donotinstallwithin
2”oftanksidewall.
(3”forSeriesULSL)
Donotinstallwith
objectsinthebeam.
Donotinstallin
applicationswith
vacuum.
Installation in existing f ittings:If the existing fitting is larger than the threads of the Series ULS, select a
reducerbushingsuchastheULSACC121(2”threadx1”thread)orULSACC131(3”threadx2”thread).
MetalTanks(SeriesULSS&ULSM):DwyerInstruments,Incultrasonictransmittershavebeenoptimizedfor
useinnonmetallicfittings.
1. Forbestperformance,avoidtheuseofmetallicfittings.
a. Useaplastic2”x1”reducerbushing,suchastheULSACC121oraplastic1”flange,suchasthe
ULSACC312formetallictanks.
2.
While installations directly into a 1” metal fitting are not recommended, acceptable results may be
obtained if the 1” fitting is a half coupling in formand the outer diameter of the coupling istightly
wrappedinvinyltapetodampenvibrations.
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Dwyer ULSL User manual

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