Specifications - installation and Operating instructionsBulletin L-45DWYeR inSTRUMenTS, inC. phone: 219/879-8000www.dwyer-inst.comp.O. BOX 373 • MiCHiGan CiTY, inDiana 46360, U.S.a. fax: 219/872-9057e-mail: info@dwyer-inst.comSeries ULT Ultrasonic Level Transmitterprovides reliable,accurate, noncontact measurement of liquid levels. Ultrasonicnon-contact technology offers no moving parts to wear, jam, cor-rode, or get coated like contact technologies. Mapping softwaremakes effective measuring surface only a 3˝ diameter column.No concerns with ladders, pipes, or other tank intrusions in theremaining sound cone. Unit is FM approved explosion-proofmaking it ideal for use in hazardous locations. The ULT featureseasy programming with 6 digit LCD display and simple menustructure. Output range is adjustable with choices of inputtingtank dimensions or just fill and empty the tank while calibratingand it automatically scales to levels it senses. Window coverallows early viewing of display. Failsafe output options and diag-nostic capabilities makes the ULT a good choice for criticalapplications.SpeCifiCaTiOnSService:Compatible fluids. Not for use with powder and bulksolids.Wetted Materials:Sensor: PVDF; process connection: 303 SS.Ranges:24.6´ (7.5 m), 32.8´ (10m).accuracy:±0.2% of maximum range.Resolution:0.079˝ (2 mm).Blind Zone:Under 8˝ (20 cm).Beam Width:3˝ (7.6 cm) diameter.Temperature Limits:Ambient: -40 to 140°F (-40 to 60°C),Process: -4 to 140°F (-20 to 60°C).Temperature Compensation:-40 to 140°F (-40 to 60°C)pressure Limits:30 psi (2 bar) up to 25°C (77°C). Above 25°C(77°F), rating decreases 1.667 psi per 1°C increase.See chart.See pressure and temperature chart.power Requirement:18 to 28 VDC (2 wire).Output Signal:4 to 20 mA or 20 to 4 mA (Two-wire).Max. Loop Resistance:250 Ohms at 24 VDC.electrical Connections:Screw terminal.Conduit Connection:1/2˝ NPT female (two) or M20.process Connection:2˝ NPT male or BSPT.enclosure Rating:Weather-proof meets NEMA 4X, explosion-proof rated Class I, Div. 1, Groups B, C, D; Class II/III, Div. 1,Groups E, F, G.Mounting Orientation:Vertical.failsafe:On lost echo after 30 seconds, user selectable to 4,20, 21, 22 mA or last signal.Memory:Non-volatile.Display:6 character LCD.Units:In, cm, ft, m, percent.Memory:Non-volatile.programming:4 button.Weight:4.0 lb (1.8 kg)agency approvals:CE, FM.3 29/32[99.21]8 1/16[204.79]2X 1/2 NPT4 9/32[108.74]ø3 21/64[84.53]Series ULT Ultrasonic Level TransmitterSeriesRangeOptionsULT1212Ultrasonic Level Transmitter24.6´ (7.5 m)32.8´ (10 m)2˝ NPT male process with 1/2˝ NPT female conduit2˝ BSPT male process with M20 conduitModel ChartTEMPERATURE/PRESSURE DERATINGTEMPERATURE °CUNACCEPTABLERANGEOPERATING PRESSURE PSIACCEPTABLERANGE403020100-40 -20 0 20 40 60 80OpeRaTinG pRinCipLeUltrasound is sound with a frequency greater than the upper limitof human hearing; approximately 20 kilohertz. The ULT containsan ultrasonic transducer and a temperature sensing element.The ultrasonic transducer transmits ultrasound wave pulsesthrough air directed towards the material of which the level isdesired. The ultrasound waves then reflect off of the material asan echo and travel back to the transducer. The level of thematerial is determined by the transit time of the ultrasound wavepulse from the sensor to material and for the echo to come backto the sensor. The speed of sound through air is sensitive to theair temperature. The ULT uses the temperature sensing elementto compensate for air temperature changes. The ULT incorporates patented surface processing technologyand adaptive signal processing. Surface processing technologyfilters out all signal obstructions that may be in the tank creatingan effecting beam diameter of only 3˝ (7.6 cm). This beam diam-eter is a straight column and not cone shaped like competitorunits. Adaptive signal processing continuously optimizes sensorpower, output filtering, and environmental noise rejection.inSTaLLaTiOnUnpackingRemove the ULT from the shipping carton and inspect for dam-age. If damage is found, notify the carrier immediately. MaterialsThe ULT may be used to detect level of a variety of materials.Since the sensing technology is non-contact it is well suited forcorrosive, coating, slurry, or sticky media. The hazardousapproval rating also makes the unit ideal for use with hazardousrated applications. Please see the specifications section for haz-ardous approval classifications. Mounting Location•The process temperature and ambient temperature must be within the specified limits.•The probe must be located away from tank inlets or chutes where material may fall on the probe during filling or emptying.•The probe must be located at least 3˝ (7.6 cm) away from the tank side wall.•The probe cannot be used in vacuum applications.•The probe must be installed vertically and perpendicular to the media surface. •Make sure the covers are accessible to allow for programming, wiring, and ability to see the display. DO NOT INSTALLWITHIN THREE INCHESOF TANK SIDE WALL DO NOT INSTALLIN APPLICATIONSWITH VACUUMVACUUMfigure 1: Unsuitable Mounting LocationsDO NOT INSTALL ATAN ANGLE RELATIVETO THE LIQUID DO NOT INSTALLWITH OBJECTSIN THE BEAM MOUnTinG fiTTinGFittings should be selected that minimize the installation heightof the transmitter so that mounting hardware does not interferewith the acoustic signal. If the installation does require a riserthen the transmitter may be elevated up to 12˝ (30 cm) in a 6˝(15 cm) diameter riser, 8˝ (20 cm) in a 4˝ (10 cm) diameter riser,and 3˝ (7.6 cm) in a 2˝ (5 cm) diameter riser, see Figure 2. Astand pipe may be used to dampen turbulence or separate sur-face foam. Use a minimum 3˝ diameter pipe and cut to thedesired length of the transmitter span with a 45° notch at the bot-tom. A ventillation hole needs to be created at the top of the pipewithin the 8˝ (20 cm) blind zone, see Figure 3.HEIGHTINNERDIAMETER RISERfigure 3: Stand pipe Mountingfigure 2: Riser Mounting VENTILLATION HOLEBLIND ZONE8 [203.20]OPERATIONALRANGELOWEST LIQUID LEVEL ø3 [76.20] MINIMUMeLeCTRiCaL COnneCTiOnCaUTiOn:Do not exceed the specified supply volt-age rating. Permanent damage not covered by thewarranty may result. This unit is not designed for ACvoltage operation.nOTe:Installation must be made in accordance with local codesand regulations. When fishing wire through the conduit connec-tion do not allow the wire to touch or press on components onthe boards. Damage to the circuitry may result. Make sure thatthe wire is routed so it will not interfere with the calibrationswitches.CaUTiOn: Hazardous area Use: Plug anyunused conduit openings. Plug must engage aminimum of 5 threads. Use a conduit seal within18˝ (45.7 cm) of conduit entry. Disconnect powerbefore opening, servicing, programming, installing,or removing. The ULT provides two 1/2˝ NPT female ports for conduit con-nection. The conduit connection must be made such that con-densation is not allowed to enter the sensor housing. If neces-sary install a conduit breather drain in a separate conduit bodyto prevent buildup of moisture. If nonmetallic conduit is used theprotective ground may be connected to the internal ground con-nection screw.The ULT transmitter is designed as a two wire 4-20 mA device.Connection to the board is through a two pin terminal block. Thecircuitry is polarized so the positive must be connected to termi-nal 1 and the negative must be connected to terminal number 2.It is recommended that shielded twisted pair wire be used if thepotential exists for interference from external noise sources.Ground the shield at the case using the internal ground screwand leave the other end of the shield open. Do not use theshield as one of the current loop conductors.24 VDCINDEXENTERUPDOWNfigure 4: electrical Wiring Diagramfigure 5: Display and programming ButtonsSeTUp & CaLiBRaTiOnFour buttons are provided for all setup and calibration opera-tions. All settings are stored in nonvolatile memory so they willnot be lost if the power is removed. Where VPSis the power supply voltage.RMAX =VPS- 18.020mApower SupplyThe transmitter requires a minimum of 18 Volts DC at its con-nection for proper operation, and a maximum of 28 Volts.Choose a power supply with a voltage and current rating suffi-cient to meet this power specification under all operational con-ditions. If the supply is unregulated, make sure that the outputvoltage remains within the required voltage range under allpower line conditions. Ripple on the supply should not exceed100 mV.Loop ResistanceThe maximum allowable loop resistance is dependent on thepower supply voltage. The maximum loop voltage drop must notreduce the transmitter voltage below the 18 Volt minimum. Themaximum loop resistance can be calculated using the followingequation:KeY fUnCTiOnSinDeXPressing the inDeXbutton advances the display to the nextmenu item. enTeRPressing the enTeRbutton for approximately two seconds willend operating mode and enter programing mode. In program-ming mode press the enTeRbutton will store the value of menuitems once they are changed to a new value.UpPressing the Upbutton increments a value in programming.DOWnPressing the DOWnbutton decrements a value in programming.Up & inDeXPressing the Upand inDeXsimultaneously will allow fasterincrements in a value for programming.DOWn & inDeX Pressing the DOWnand inDeXsimultaneously will allow fasterdecrements in a value for programming.DiSpLaY MenUPress inDeXto advance to the next menu time. Press enTeRto retain the value.MeaSUReSets the transmitter output: Select LiQUiDor aiR. Factorydefault is LiQUiD.LiQUiDOutput will be the height of the liquid in the tank.aiROutput will be the height of the air above the liquid in the tank.eXiTExit without making changes.UniTSSets the transmitter display and output unit of measure. SelectinCHeS, feeT, CM, or MeTeR. Factory default is inCHeS.inCHeSDisplay and output will be in inches.feeTDisplay and output will be in feet.CMDisplay and output will be in centimeters.MeTeRDisplay and output will be in meters.eXiTExit without making changes.SHOW Sets the transmitter display for distance measure or percent-age measure. Select DiSTanCeor peRCenT. Factory defaultis DiSTanCe.DiSTanCeDisplay will be in units of distance.peRCenTDisplay will be in percentage of range.eXiTExit without making changes.HeLpDisplays a guide to the menu items in this menu. Press enTeRto display.eXiTExits DiSpLaYmenu and goes back to the top menu. PressenTeRto go back to the top menu or press inDeXto loop backthrough the DiSpLaYmenu options. MenU SeLeCTiOnSThe transmitter has two modes: operating and programming. Inthe normal operating mode the transmitter will display the liquidheight. The unit comes factory calibrated with the output default-ed to 4 mA equal to the maximum range and 20 mA equal to theminimum range of the transmitter model. In the programmingmode the transmitter will display the programming menus andchoices. When in the programming mode the transmitter willhold the last current value. The value will not change until thetransmitter is returned to operating mode via RUN in the menustructure. To enter the programming mode press and hold the enTeR but-ton for approximately 5 seconds. Once in programming modethere are the following top menu selections: DiSpLaY, TanK,OUTpUT, TaRGeT CaL, VaLUeS, HeLp, and RUn. Pressingthe inDeXbutton will increment to the next top menu and press-ing the ENTER button will enter the menu for programmingchanges.TanK MenUIf the tank dimensions are known these menu item can be usedto set the 4 and 20 mA points manually. See Figure 6 below.Press inDeXto advance to the next menu item. Press enTeRto retain the value.HeiGHTSets the 4 mA value. Program as the distance from thetransducer face to the 4 mA value desired (normally the bottom or lowest value of the tank). Factory default is the maximum range of the model. Use the Upand DOWnbuttons to change the value in the length units the unit has been programmed for. The programmed value can be anywhere in the range below fiLL HeiGHT. If reverse mA is used then this will become the 20 mA value.fiLL HeiGHT Sets the 20 mA value. Program as the distance from theHeiGHT(normally the bottom of the tank) to the 20 mA valuedesired. Factory default is the maximum range of the modelminus the blind zone distance of 8˝ (20 cm). Use the UpandDOWnbuttons to change the value in the length units the unithas been programmed for. The programmed value can be any-where in the range above HeiGHT. The maximum value forfiLL HeiGHTis the maximum range of the unit minus the blindzone distance of 8˝ (20 cm). The blind zone distance is auto-matically subtracted from the fiLL HeiGHTvalue programmed.If reverse mA is used then this will become the 4 mA value.HeLpDisplays a guide to the menu items in this menu. Press enTeRto display. eXiTExits TanKmenu and goes back to the top menu. Press enTeRto go back to the top menu or press inDeXto loop back throughthe TanKmenu options. 4 mA (FULL)BLIND ZONE8 [203.2] 20 mA(EMPTY) figure 7: Reverse Output OperationOUTpUT MenUPress inDeXto advance to the next menu item. Press enTeRto retain the value.SafeMODeSets the output of the transducer for fail-safe mode. The trans-mitter will output the safe mode programmed setting if the trans-mitter loses the echo signal. Select 22 mA, 21 mA, 20 mA, 4 mAor HOLD. Factory default value is 22 mA. Unit will resume nor-mal operation when echo signal is again received. 22 maOutput of 22 mA.21 maOutput of 21 mA.20 maOutput of 20 mA.4 maOutput of 4 mA.HOLDOutput of last known signal is held.eXiTExit without making changes.ReVeRSe MaSets the transmitter output to be forward or reverse acting.Select NORM or REV. Factory default is NORM with 4 mA setat the maximum range of the unit and 20 mA set at the end ofthe blind zone. See Figure 7 below. NOTE: HEIGHT and FILL Hmust be set before reversing the output. nORM 4 mA is set to be the bottom of the tank (tank empty)and 20 mA is set to be the height the liquid can go in the tank(tank full).ReVeRSe20 mA is set to be the bottom of the tank (tank empty) and 4 mA is set to be the height the liquid can go inthe tank (tank full).eXiT Exit without making changes.BLIND ZONE8 [203.2]20 mA (FULL) 4 mA (EMPTY)figure 6: HeiGHT and fiLL HeiGHTHeLpDisplays a guide to the menu items in this menu. Press enTeRto display.eXiTExits OUTpUTmenu and goes back to the top menu. PressenTeRto go back to the top menu or press inDeXto loop backthrough the OUTpUTmenu options. BLIND ZONE8 [203.2]HEIGHT(MAX R)(MIN R)FILL H TaRGeT CaL MenUTarget Calibration sets the tank empty and tank full distances forthe transmitter output based on the actual level in the tank. Thisis good to use if the tank dimensions are unknown or if it isdesired to fill and empty the tank for precise measurementpoints. Press inDeXto advance to the next menu time. PressenTeRto retain the value. See Figure 8 below.fULLFill the tank to the full liquid level desired. Press enTeRand thislevel will be saved.eMpTYDrain the tank to the empty level desired. Press enTeRand thislevel will be saved. HeLpDisplays a guide to the menu items in this menu. Press enTeRto display.eXiTExits TaRG CaL menu and goes back to the top menu. PressenTeR to go back to the top menu or press inDeXto loop backthrough the TaRGCaLmenu options.figure 8: Target CalibrationVaLUeS MenUSeTUpDisplays the current programmed setup for the unit. This isscrolling data that will return to the VaLUeSmenu after display-ing all the parameters. Values shown are: MeaSUR, then thesetting; UniTS, then the setting; SHOW, then the setting;HeiGHT, then the setting; fiLL H, then the setting; Safe, thenthe setting; ReV Ma, then the setting. DiaGnOSTiCSDisplays diagnostic items that may be relevant to the transmitterand its performance in the application. This is scrolling data thatwill return to the VaLUeSmenu after displaying all the parame-ters. Values shown are RanGe, then the setting; TeMp, thenthe setting; eCHO, then the setting; pOWeR, then the setting;VeR, then the setting. ReSeT Resets the programming to factory default settings.YeSResets the programming to factory default settings.nOExits without making changes.eXiTExits VaLUeSmenu and goes back to the top menu. PressenTeRto go back to the top menu or press inDeXto loop backthrough the VaLUeSmenu options.HeLp MenUContains contact information for Dwyer Instruments, Inc.©Copyright 2013 Dwyer Instruments, Inc.Printed in U.S.A. 5/13FR # M3-443689-00 Rev.1DWYeR inSTRUMenTS, inC. phone: 219/879-8000www.dwyer-inst.comp.O. BOX 373 • MiCHiGan CiTY, inDiana 46360, U.S.a. fax: 219/872-9057e-mail: info@dwyer-inst.comMainTenanCe & RepaiROther than the controls mentioned in this manual there are nouser maintenance adjustments or routine servicing required forthis product. The unit is not field repairable and should bereturned to the factory if service is required. Disassembly ormodifications made by the user will void the warrantee and couldimpair the continued safety of the product. If repair is requiredobtain a Returned Goods Authorization (RGA) number and sendthe unit, freight prepaid, to the address below. Please include adetailed description of the problem and conditions under whichthe problem was encountered. Dwyer Instruments, Inc.Attn: Repair Department102 Highway 212Michigan City, IN 46360Next >