Siemens Canada Siemens Milltronics Process Instruments LR400 SITRANS LR 400 User Manual sitranslrd3

Siemens Canada Ltd. - Siemens Milltronics Process Instruments SITRANS LR 400 sitranslrd3

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users manual 1

Instruction Manual September 2001SITRANS LR 400SITRANS LR 400
© Siemens Milltronics Process Instruments Inc. 2001Safety GuidelinesWarning notices must be observed to ensure personal safety as well as that of others, and toprotect the product and the connected equipment. These warning notices are accompaniedby a clarification of the level of caution to be observed.Qualified PersonnelThis device/system may only be set up and operated in conjunction with this manual.Qualified personnel are only authorized to install and operate this equipment in accordancewith established safety practices and standards.Warning: This product can only function properly and safely if it is correctly transported,stored, installed, set up, operated, and maintained.Note: Always use product in accordance with specifications.Copyright Siemens Milltronics ProcessInstruments Inc. 2001. All Rights ReservedDisclaimer of LiabilityThis document is available in bound version and inelectronic version. We encourage users topurchase authorized bound manuals, or to viewelectronic versions as designed and authored bySiemens Milltronics Process Instruments Inc.Siemens Milltronics Process Instruments Inc. willnot be responsible for the contents of partial orwhole reproductions of either bound or electronicversions.While we have verified the contents ofthis manual for agreement with theinstrumentation described, variationsremain possible. Thus we cannotguarantee full agreement. Thecontents of this manual are regularlyreviewed and corrections are includedin subsequent editions. We welcomeall suggestions for improvement.Technical data subject to change.Contact Technical Publications at the following address:Technical PublicationsSiemens Milltronics Process Instruments Inc.1954 Technology Drive, P.O. Box 4225Peterborough, Ontario, Canada, K9J 7B1Email: techpubs@siemens-milltronics.comFor the library of SMPI instruction manuals, visit: www.siemens-milltronics.com
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT immmmmTable of ConetnsTable of ContentsGeneral Information ...........................................................................................................1The Manual ...............................................................................................................................................1SITRANS LR 400 ......................................................................................................................................3Structure ....................................................................................................................................................3Specifications ......................................................................................................................4SITRANS LR 400 ......................................................................................................................................4Dimensions ...............................................................................................................................................8Installation .........................................................................................................................11Mounting Location ................................................................................................................................11Electrical connection ............................................................................................................................13Start Up ...............................................................................................................................15Self-test ....................................................................................................................................................15Multi-display ...........................................................................................................................................15Local Programming ...............................................................................................................................15Auto-Setup ..............................................................................................................................................15Operation ............................................................................................................................16General information ..............................................................................................................................16Measuring principle .............................................................................................................................16Operating the SITRANS LR 400 .........................................................................................................19Changing a Parameter Value ..............................................................................................................20Disabling and enabling programming ..............................................................................................22Operating examples ..............................................................................................................................23Parameters (HART) ...........................................................................................................25Required Parameters ............................................................................................................................25Additional Parameters .........................................................................................................................27Parameters (Profibus PA) ................................................................................................53Troubleshooting .................................................................................................................62Classification of faults ..........................................................................................................................62Self-test ....................................................................................................................................................62Symptoms, causes and their remedy ...............................................................................................63Fault messages ......................................................................................................................................64Maintenance and repairs ................................................................................................65Changing the device fuse ....................................................................................................................65Disconnecting the electronics part from the mechanical part ..................................................66Cleaning the antenna ...........................................................................................................................66Certificates .........................................................................................................................67sitranslrd3.book Page i Tuesday, October 9, 2001 10:09 AM
ii SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmTable of ContentsGlossary ..............................................................................................................................68Appendix I ..........................................................................................................................69Alphabetical Parameter List ...............................................................................................................69Appendix II .........................................................................................................................73Programming Chart ...............................................................................................................................73 76Appendix III ........................................................................................................................77Ambient/Operating Temperature Specification .............................................................................77Appendix IV ........................................................................................................................78Process Pressure/Temperature de-Rating ......................................................................................78sitranslrd3.book Page ii Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 1mmmmmGeneral InformationGeneral InformationThe ManualRefer to this manual for proper installation, operation and maintenance of the SITRANS LR 400 Radar Level Instrument. Special attention must be paid to warnings and notices that are highlighted from the rest of the text by grey boxes.• These instructions do not claim to cover all details or variations in equipment, not to provide for every possible contingency that may arise during installation, operation, or maintenance.• For further information or to resolve issues not covered in the manual, consult your Siemens Milltronics representative.• The contents of the manual shall not become part of or modify any prior or existing agreement, commitment or relationship. The Sales Contract contains the entire obligation of Siemens. The warranty contained in the contract between the parties is the sole warranty of Siemens Milltronics.Warning means that failure to observe the necessary precautions can result in death, serious injury and/or considerable material damage.Note means important information about the actual product or that part of the operating manual to which particular attention should be paid.Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.WARNING: Changes or modifications not expressly approved by Siemens Milltronics could void the user’s authority to operate the equipment.IMPORTANT: All specifications are subject to change without notice. Please ensure that any safety-related information is confirmed with a qualified Siemens Milltronics representative.
Page 2 SITRANS LR 400 –INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmGeneral InformationQualified personnelQualified personnel are familiar with the installation, commissioning, and operation of this equipment. In addition the person must be:• trained and authorized to operate and service equipment/systems in accordance with established safety procedures relating to electrical circuits, high pressures and aggressive media.• trained in the proper care and use of protective equipment in accordance with established safety practices.• trained in rendering first aid.Warning: • Installation shall only be performed by qualified personnel and in accordance with local governing regulations• The SITRANS LR 400 is to be used only in the manner outlined in this manual or protection provided by equipment may be impaired.
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 3mmmmmGeneral InformationSITRANS LR 400The SITRANS LR 400 Radar Level Instrument is designed for level measuring of liquids and solids in storage vessels. SITRANS LR 400 operates reliably with its high microwave frequency even with poorly reflecting measuring media. The narrow antenna beam results in a sharp radiation cone, therefore SITRANS LR 400 is quite insensitive to vessel interferences. StructureThe terminals for the power cable and the signal cable are behind the connection cover (9) on the left hand side of the housing (1). The signal cable must be fed in from the right through the cable glands (2).The device can be separated into electronic and mechanical sections at the threadedring (5).An optional temperature extension is positioned between the threaded ring (5) and the flange (6). Refer to Dimension diagram on page 8.The end of the antenna (7) must reach inside the vessel through the vessel nozzle (see page 12).Return the orientation of the housing to the same position with reference to the flange after any servicing to ensure similar performance.123456789Electronics sectionMechanical section1 Housing2 Cable gland3 Electronics cover4 Operating and monitoring module5 Threaded ring6 Process Flange7 Antenna8 Intermediate flange9 Connection cover
Page 4 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmSpecificationsSpecificationsSITRANS LR 400Power• Power Supply 120 to 230 Vac, ±15%, 50/60 Hz, 6W (12VA)or24 Vdc, +25/-20%, 6WPower failure: bridge of at least 1 mains period (> 20 ms)Fuse• Fuse (both ac and dc versions)SI1 Fast acting ceramic, 4 x 20 mm, 1A, 250 VacSI2 Slow-Blow, 4 x 20 mm, 0.63 A, 250 VacInterface• Analog output (Not applicable to Profibus PA option)Signal range 4 to 20 mAUpper Limit 20 to 22.5 mA adjustableFail signal 3.6 mA; 22 mA; 24 mA or last valueLoad Max. 600 Ω, for HART communication min. 230 Ω• Digital OutputFunction Configurable as a device status or limit value(level, volume)Signal type Relay, either NCC or NOC functionmax. DC 50 V, max. 200 mA, rating max. 5 W.Self-resetting fuse, Ri = 9 Ω• Electrical Isolation Outputs electrically isolated from the power supply andfrom each other• Display LCD, two lines of 16 characters each,configurable for the following displays:level, volume, amplitude, digital output,temperature, validity, signal-to-noise ratioMulti–display: 2 freely selectable measured values aredisplayed simultaneously•Operation4 optical control elements, finger activated, menu-guidedNote: Siemens Milltronics makes every attempt to ensure the accuracy of these specifications, but reserves the right to change them at any time. Please ensure these are the most recent specifications. Contact your representative, or check our website at www. milltronics.com for the most up-to-date information.sitranslrd3.book Page 4 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 5mmmmmSpecificationsMechanical• Nominal sizes DIN DN 80 DN 100 DN 150ANSI 3" 4" 6"JIS 80 mm 100 mm 150 mm• Pressure classesDIN PN16 PN40ANSI 150 lb 300lbJIS 10KFlange• Process Connection Flange DIN 2527, ANSI B16.5, or JIS B2238 equivalent boltpattern• Materials of the wetted Stainless steel, material–no. 1.4571 and 1.4581, PTFEparts –in contact with (or glass/PTFE, Zone 0 and Zone 20 devices)the processEnclosure• construction Die-cast aluminum, painted• conduit M20 (cable diameter 6 to 9.5 mm[0.24 to 0.37"])or ½”-14 NPT• ingress protection Type 4X/NEMA 4X, Type 6/NEMA 6, IP 671Weight• Weight of unit and flange1.Use only approved, suitable sized hubs for watertight applications.Flange Pressure Class Size WeightDIN 2527 PN 16 DN 80 11.9 kg (26.1 lbs)DN 100 13.2 kg (28.9 lbs)DN 150 19.2 kg (42.1 lbs)PN 40 DN 80 12.9 kg (28.4 lbs)DN 100 15.5 kg (34.1 lbs)DN 150 24.1 kg (43.1 lbs)ANSI B 16.5 150 lb 3" 12.2 kg (26.8 lbs)4" 14.8 kg (32.5 lbs)6" 20.1 kg (44.2 lbs)300 lb 3" 14.3 kg (31.5 lbs)4" 20.2 kg (44.4 lbs)6" 31.8 kg (69.9 lbs)JIS B2238 10K 80 mm 11.9 kg (26.1 lbs)100 mm 13.2 kg (28.9 lbs)150 mm 19.2 kg (42.1 lbs)sitranslrd3.book Page 5 Tuesday, October 9, 2001 10:09 AM
Page 6 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmSpecificationsEnvironmentallocation: indoor/outdooraltitude: 2000 m maxambient temperature: -40 to 65°C (-40 to 149°F)relative humidity: suitable for outdoor (Type / Nema 4X, 6/ IP67)installation category IIpollution degree 4• *Process Temperature -40 to 140°C (-40 to 284°F),optional -40 to 240°C(-40 to 482°F) • Electromagnetic compatibilitySpurious emission according to EN 50 081Interference strength according to EN 50 082 and NAMUR• *Perm. ambient -40 to 65°C (-40 to 149°F) (non-hazardous version)temperature -20 to 65°C (-4 to 149°F) (hazardous version)LCD: -10 to 55 °C (14 to 131°F)Observe the temperature classes in hazardous areas!• Perm. storage -30 to 80°C (-22 to 176°F),temperatureApprovals (verify against device nameplate)• Explosion Protection Certificate No. PTB 00 ATEX 1024** Refer to device II 1/2G EEx d IIC T6II 2G EEx d IIC T6 nameplate II 1/2G EEx dem IIC T6II 2G EEx dem IIC T6II 1/2G EEx dem [ib] IIC T6II 2G EEx dem [ib] IIC T6II 1/2G EEx dem [ia] IIC T6II 2G EEx dem [ia] IIC T6Certificate No. DMT 01 ATEX E 038II 1/2 D IP 65 (dust zone 20, zone 21 approval)• General FM, CSAapproval pending• Radio FCC, Industry Canada, European Radioapproval pendingComunication• Communication:HARTLoad 230 to 600 Ω, 230 to 500 Ω when connecting a couplingmoduleLine two-wire shielded: ≤ 3 kmmulti-wire shielded: ≤ 1.5 kmProtocol HART, Version 5.1*Note: Refer to Process/Ambient de-rating curves in Appendix III.sitranslrd3.book Page 6 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 7mmmmmSpecificationsCommunication: Profibus PAProtocol Layer 1 and 2 Profibus PA, technology: IEC 61158-2, slave-functionalityDevice Class BDevice Profile 3.0• PC/Laptop requirements IBM-compatibleRAM ≥ 64 MbytesHard disk ≥ 100 MbytesRS 232-C interfaceVGA graphic card (≥ 640 x 480)• Software for PC/Laptop Windows 95/98 or NT 4.0SIMATIC PDMPerformanceMeasured value error (under reference conditions)• Measuring error ≤ ± 15 mm at 0.26 to 2 m distance≤ ± 5 mm at 2 to 10 m distance≤ ± 15 mm at 10 to 45 m distance(see diagram below)• Dead zone 0-26 cm from bottom edge of flange• Additional contribution of ≤ 0.1 % of the measured valueAnalog Output ≤ 0.05 % of full scale• Additional Contribution of ≤ 0.05 % per 10 % deviation of UNthe Supply Voltage• Influence of pressure ≤ 0.3 % to 10 bar without pressure correction(air, 20°C) ≤ 2 % at 10 to 64 bar without pressure correction• Long-term stability ≤ ± 1 mm/year• Repetitive accuracy ≤ ± 1 mm at 0 to 45 m, damping ≥ 1 s• Reference conditionsMedium Triple reflector on the main axis of the antenna main lobeAmbient temperature 25 ± 5°C (77 ± 9°F)Ambient pressure 1050 mbar ± 10 %Absolute Measuring Error5101520Absolute measuring error [mm]10 20 30 40Distance from flange [m]452-20-15-10-50sitranslrd3.book Page 7 Tuesday, October 9, 2001 10:09 AM
Page 8 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmSpecificationsDimensionsFlange acc. to DIN 2527 / ANSI B 16.5 / JIS B 2238 bolt hole patternoptional temperature extension409 mm (16.1")281 mm (11.1")191 mm (7.5") or238 mm (9.4")72 mm (2.8") or98 mm (3.9")153 mm (6.0")62 mm (2.4")73 mm (2.9")84 mm (3.3")204 mm (8.0")Customer to provide adequate bolting and gasket to retain vessel pressure and provide sufficient seating.sitranslrd3.book Page 8 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 9mmmmmSpecificationsDIN / JIS Flat Face Flange DiagramFlange according to DIN 2527 (see Flange Diagram on page 9)Flange according to JIS B 2238Pipe Size Flange Size Flange O.D. Thickness (s) Bolt Hole Circle Ø Bolt Hole ØNumber of Bolts80 mm PN 16 200 mm 20.0 mm 160 mm 18.0 mm 8100 mm PN16 220 mm 20.0 mm 180 mm 18.0 mm 8150 mm PN 16 285 mm 22.0 mm 240 mm 22.0 mm 880 mm PN 40 200 mm 24.0 mm 160 mm 18.0 mm 8100 mm PN 40 230 mm 24.0 mm 190 mm 22.0 mm 8150 mm PN 40 300 mm 28.0 mm 250 mm 26.0 mm 8Pipe Size Flange Size Flange O.D. Thickness (s) Bolt Hole Circle Ø Bolt Hole ØNumber of Bolts80 mm 10 K 185 mm 20.0 mm 150 mm 19.0 mm 8100 mm 10 K 210 mm 22.0 mm 175 mm 19.0 mm 8150 mm 10 k 280 mm 24.0 mm 240 mm 23.0 mm 8Bolt Hole ØThickness (s)Flange O.D.Bolt Hole Circle Øhorn mounting holessitranslrd3.book Page 9 Tuesday, October 9, 2001 10:09 AM
Page 10 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmSpecificationsANSI Raised Face Flange DiagramFlange according to ANSI B 16.5 (see Flange Diagram on page 9)Pipe Size Flange Size Flange O.D. Thickness (s) Face O.D. Bolt Hole Circle Ø Bolt Hole ØNumber of Bolts3" 150 # 7.50" 0.941" 5.0" 6.00" 0.74" 44" 150 # 9.00" 0.941" 6.19" 7.50" 075" 86" 150 # 11.00" 1.00" 8.5" 6.62" 0.88" 83" 300 # 8.25" 1.12" 5.0" 6.62 0.88" 84" 300 # 10.00" 1.25" 6.19" 7.88" 0.88" 86" 300 # 12.51" 1.44" 8.5" 10.62" 0.88" 12Thickness (s)Raised Face thickness 0.063" (mm)Bolt Hole Øhorn mounting holesFlange O.D.Bolt Hole Circle ØFace O.D.sitranslrd3.book Page 10 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 11mmmmmInstallationInstallationMounting Location• Do not mount in direct sunlight without the use of a sun shield. Refer to Appendix III (Ambient/Operating Temperature Specfication) on page 77. Note:• The SITRANS LR 400 is rated for Type 4X/NEMA 4X, Type 6/NEMA 6, IP 67. Follow all installation and operating instructions to meet the requirements of this type of protection. Use only approved, suitable sized hubs for watertight applications.• Observe all maximum permissible ambient and process temperatures. Refer to Appendix III (Ambient/Operating Temperature Specification).• Provide a warning sign and/or touch guard if the surface of the measuring instrument can get hotter than 70°C in use.Warning: For vessels with conical or parbolic tops, avoid mounting the unit at the center. The concavity of the top can focus echoes into the centre, giving false readings.Mount the unit more than 1 m away from the vessel walls, pipes and other assemblies as well as the filling stream because all these influences will become noticeable as reflective interference. Align the antenna so that the radar cone hits the surface of the measuring medium as vertically as possibleFlatConi calP a ra b o licConicalParabolicFlatis preferred locationis acceptable locationsitranslrd3.book Page 11 Tuesday, October 9, 2001 10:09 AM
Page 12 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmInstallationCorrect Installation in Mounting NozzleThe bottom edge of the antenna must reach inside the vessel to avoid reflective interference at the wall of the nozzle. Above flange size DN 150/6 inch, the antenna may end in the nozzle unless the radiation cone (the extension of the antenna’s angle) touches the nozzle wall.sitranslrd3.book Page 12 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 13mmmmmInstallationElectrical connectionAC version:• The equipment must be protected by a 15A fuse or circuit breaker in the building installation.• A circuit breaker or switch in the building installation, marked as the disconnect switch, shall be in close proximity to the equipment and within easy reach of the operator. All field wiring must have insulation suitable for at least 250 V.DC version:• DC input terminals shall be supplied from an SELV source in accordance with IEC 1010-1 Annex H.1264 5378L1L2NRated temperature ofconnection cables mustexceed maximum ambienttemperature by at least 15 KPROFI-BUS PAHart Wiring Profibus Wiring1264 5378L1L2NmARated temperature ofconnection cables mustexceed m aximum ambienttemperature by at least 15 Kearth terminalearth terminalcable clamp cable clamp1264 5378mA19-3 0 VRated temperature ofconnection cables mustexceed maximum ambienttemperature by at least 15 K12645378PROFI-BUS PA19- 30 VRated temperature ofconnection cables mustexceed maximum ambienttemp erature by at leas t 15 KHart Wiring Profibus Wiringearth terminal earthterminalcable clamp cable clampNote (AC and DC versions):• 4-20 mA, Profibus PA, DC input circuits, 14 - 20 AWG, shielded copper wire• AC input circuit, min 14 AWG copper wire• Recommended torque on terminal clamping screws, 0.5 - 0.6 Nmsitranslrd3.book Page 13 Tuesday, October 9, 2001 10:09 AM
Page 14 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmInstallationMake the electrical connections as follows:1. Release the cover lock on the connection box with a 3 mm Allen key.2. Unscrew the cover from the connection box.3. Push the power cable and signal cable through the cable gland on the right of the unit., up to the terminal strip. Lay the cable in a bend before the cable gland so that moisture cannot enter the connection box.4. Connect the earth conductor of the power supply to the earth terminal in the connection box. Choose a length of cable so that the earth conductor is disconnected last when you pull the cable.5. In devices with ignition protection types II 1/2G EEx dem [ia] IIC T6 and II 1/2G EEx dem [ib] IIC T6 or II 2G EEx dem [ia] IIC T6 and II 2G EEx dem [ib] IIC T6, mount the cover for the power supply terminals.6. Tighten the cable screw gland and check the strain relief (pull and turn).7. In devices with ignition protection type II 1/2G EEx D IIC T6 or II 2G EEx d IIC T6, replace unused screw-type cable glands with a certified dummy plug.8. Screw the cover onto the housing and tighten it without using a tool. The sealing ring must be clean and undamaged.9. Mount the cover lock of the connection box cover.10. Connect the earth terminal located between the screw-type cable glands to a ground connection at your vessel by using a cable of a cross-section at least 2.5 mm2 wide.For error-free communication via the HART protocol, a load of at least 230 Ω must be available in the signal circuit.Warning: To avoid short-circuits, do not connect a load resistance with bare wires in the connection box.The housing cover may not be unscrewed in a hazardous area when the device is under voltage (power supply, digital outputs on external supply). In devices with ignition protection types II 1/2G EEx dem [ia] IIC T6 and II 1/2G EEx dem [ib] IIC T6 II 2G EEx dem [ia] IIC T6 and II 2G EEx dem [ib] IIC T6, only the cover of the connection box may be unscrewed for test purposes. The cover on the power supply terminals may not be removed!sitranslrd3.book Page 14 Tuesday, October 9, 2001 10:09 AM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 15mmmmmStart UpStart UpSelf-testThe device performs a self-test after switching on the power supply. It is ready for operation and programming when the LCD displays the multi-display and the control elements can be operated.Multi-displayThe multi-display shows on the LCD after a successful self-test with the output of the level in the first line and the signal-to-noise ratio in the second line (factory setting):Local ProgrammingWhen the mult-display shows on the LCD, you are ready to begin local programming using the optical control elements. To access the parameter settings, touch the element once. "Main Menu" is displayed in the first line of the LCD. Then program the unit beginning with the Auto-Setup parameters.Auto-SetupAfter switching on the SITRANS LR 400, and after a successful self test, set the Auto-Setup parameters to make the system operational.: (see page 25).• The language of the local user interface (English or Deutsch)• The unit of length of the measured level• The nozzle height in the selected unit of length •The vessel height in the selected unit of length)• The LRV as a distance from the bottom of the vessel • The URV as a distance from the bottom of the vessel• The damping of the measured level in s.• The application type• The bus-address by Profibus PA communication (on Profibus models)Enter the necessary values as described in "Parmeters" on page 25.If the multi-display does not appear or displays incorrect measured values after Auto-Setup, proceed as described in “Troubleshooting” on page 62.Refer to the Parameter section that begins on page 25 for a list of available parameters.Note: Frequent switching off and on of the devices causes aging of the electronics (see Parameter 3.1).+1 2 30 0 mbd03+.sitranslrd3.book Page 15 Tuesday, October 9, 2001 10:09 AM
Page 16 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmOperationOperationGeneral informationYou can operate the SITRANS LR 400 with:• Local operating and monitoring module• HART-Communicator or Profibus PA• PC/Laptop and SIMATIC PDM software (recommended)Measuring principleThe SITRANS LR 400 operates according to the FMCW (Frequency Modulated Continuous Wave) method. Its antenna sends microwaves to the surface of the measuring medium, the frequency of which is modulated continuously (see “Determining the Differential Frequency on page 17). A receiver registers the reflection at the surface of the measuring medium and links it with the simultaneously radiated signal.The propagation speed of microwaves in gases corresponds to the speed of light. The distance d is therefore proportional to the propagation time t :d= distance, t = measured time, c = speed of light Note: The device can be operated and programmed most comfortably with the SIMATIC PDM software. This software gives you the added possibility of saving and archiving your application-specific parameters and copying them back into the device if necessary.It is best to perform the operations described in the following sections directly on the device to familiarize yourself with the operation.ddct⋅2--------=chap6.fm Page 16 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 17mmmmmOperationSince the transmission signal has changed its frequency until the reception signal arrives, the link gives a differential frequency fd, which is proportional to the distance d from the reflecting surface.The distance d is given by the ratio of the differential frequency fd to the frequency deviation B and the duration of a frequency modulation phase T (see“Determining the Differential Frequency” on page 17):B = bandwidth (frequency deviation), d = distance, T = modulation duration, c = speed of light Determining the Differential FrequencyExampleThe linear frequency deviation is 200 MHz at a modulation duration of 10 ms. The surface of the measuring medium is 10 m away from the transmitting antenna. The difference signal then has a frequency of:Every reflection at a surface generates a different frequency. The reception signal therefore consists of a frequency mix from which the disturbance frequencies must be filtered which are caused by fixed targets such as struts inside the vessel.fd2Bd⋅⋅Tc⋅------------------ d,fdTc⋅⋅2B-------------------==fdtimeFrequencyTBtransmissionsignalreceptionsignaltfd2210810⋅⋅ ⋅10 3– 3108⋅⋅---------------------------------- 13 333kHz,==chap6.fm Page 17 Tuesday, October 9, 2001 2:26 PM
Page 18 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmOperationThe electrical connection of the PC/Laptops and the HART-Communicator to the 4-20-mA signal cable is shown below.Connection, HART Schematic DiagramConnection, Profibus Schematic DiagramWarning: The coupling module (shown below) may not be used in areas where there is an explosion hazard and may not be connected to intrinsically safe circuits.chap6.fm Page 18 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 19mmmmmOperationOperating the SITRANS LR 400To access parameters, use the optical control elements on the operating and monitoring module (shown below). Touch the glass in the appropriate place with your fingertips like on a touch screen. The two-line LCD displays the parameters. You can alter the setting or change to other parameters using the controls.Operating and Monitoring ModuleSelecting a ParameterThe first line of the display tells you the current operating level. The second line indicates one of the parameters you can access under the parameter group. If the level offers more than one parameter, you can have them displayed in cyclic order by using the control elements (forwards) and (backwards). The control element accesss the parameter currently displayed on the second line. The fourth control element, , closes this parameter and moves up one level until you return to the multi-display.When you select a parameter, the device displays the parameter's current value in the second line. When the value flashes, the device programming is enabled (see “Disabling and enabling programming” on page 22) and you can change the current setting. There are two different ways of changing the settings, which are explained in the following sections.LCDTwo lines of 16 characters eachOptical control elementNote: The background illumination of the LCD switches on automatically as soon as you use a control element. It goes out about three minutes after last use of a control element.chap6.fm Page 19 Tuesday, October 9, 2001 2:26 PM
Page 20 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmOperationStructure of ParametersOperation is hierarchically structured: The parameters are arranged in logical parameter groups and assigned a numerical menu identification (see below).Changing a Parameter ValueEntering Value from Selection ListIn many cases, the device offers a number of entries in a selection list which you can assign to a parameter. For these functions, you cannot enter anything other than a selection from the displayed list.You will see a single item of the selection list in the second line of the display. • Change the display cyclically forwards or backwards with the control elements or to select the desired entry from the list.The control element operates like an “Enter” key: Use it to assign the displayed list entry to the parameter. The device accepts the new setting, closes the input and switches back to the next operating level up.• The control element operates like a “Cancel” key: As soon as you press it, the device closes the parameter input but retains the originally displayed value: It does not save a changed setting!For an example of assigning a value from a selection list, see “Operating examples” on page 23.Function group2 Display.2. Display1 Multi-display2. Display2 Level2. Display3 VolumeFunction group3 DiagnosticsFunction group4 Device data 4. Device Data1 Units4. Device Data2 Operating parameters4. Device Data3 Analog output4. Device Data4 Digital output 4.4. Digital output1 Function DO4.4. Digital output2 Signal type DO4.4. Digital output3 Level param.Operating level 1Operating level 2Operating level 3chap6.fm Page 20 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 21mmmmmOperationEntering Manual ValueIf the device allows manual input of the displayed parameter, the control elements operate like a cursor control. The current input position is marked by flashing of a single character.• The control elements and change the character’s value by one up or down. For numeric values the character changes to the next digit up or down, for signs between + and -, and for text inputs to the next element of the ASCII character set. • Use the control element to move the input position to the right. At the extreme right position, press again: Here the control element operates like an “Enter” key. The device saves the changed value (if it is within the permissible input range – otherwise an error message appears on the operating and monitoring module!) and closes the parameter input.• Use the control element to move the input position to the left. At the extreme left position, press again: The control element now functions as a “Cancel” key. The device close the parameter input without saving the changed value.If you exceed the representable value range when entering a digit, SITRANS LR 400 automatically places the numeric value at the next highest position. For example, if you see the numeric value “0.9” on the display and press the control element , the display does not change to “0.0” but to “1.0”. Value “9” becomes “10”, value “90” or “99”, “100” (depending on whether you have set the input position to the second or first “9”), etc. The device adds further places before the decimal point automatically!This input system also works in the opposite direction: If, for example, the value “100” is displayed and you use the control element on the first or second “0”, the numeric value changes to “90” or “99” and the device cancels the places in front of the decimal point which are no longer required. Leading zeros are not displayed.You can also set the cursor to the decimal point (unless an integer value is currently being displayed). The control elements or then immediately multiply or divide the displayed value by 10. The necessary additional places in front of the decimal point appear. However, you cannot change the number of displayed decimal places; they always remain the same.Display text assigned to a parameter may sometimes be longer than the field of the display. An arrow pointing outward on the right or left hand side of the display line indicates that the text continues outside the display. You can move the text with the control elements and by moving the pointer past the end of the line allowing you to read the rest of the text.An example of manual input of a value is described in “Operating examples” on page 23, example 2.chap6.fm Page 21 Tuesday, October 9, 2001 2:26 PM
Page 22 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmOperationDisabling and enabling programmingTo prevent unauthorized personnel causing programming errors via the operating and monitoring module, set a customer code – a personal, freely selectable code number which may be up to 9 characters long. A device protected by a customer code still displays all functions and values but it requests input of the code number before allowing a parameter to be reset.Programming is enabled when you:• enter the requested customer code for the current parameter (only the current parameter is enabled for reprogramming. All the others are still waiting for input of the customer code).• or release the programming lock for all parameters at once in the “Code Input” function (see Parameter 5.1 on page 52).Both ways will release the programming lock on parameters for approx. 10 min.When you return to the multi-display or enter a number in the “Code Input” function which is different to the customer code, or do not operate the device for 10 minutes, the programming lock is enabled.Enter the customer code as described in Parameter 5.2 on page 52.Note: If the customer code is “0” in Parameter 5.2, programming of parameters is always enabled.chap6.fm Page 22 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 23mmmmmOperationOperating examplesExample 1(HART)The length unit should be changed from “m” to “mm.”. The starting point is the multi-display.Follow the path traced with a bold line in the diagram above for input. The other paths lead to other device functions and parameters which are not required in this example. Next to the operating path, the control elements which you need to press are indicated and the operating steps are numbered.2 x56Function group4 Device data4Function group3 Diagnostics123Function group1 Auto-SetupFunction group2 Display+12,300 m+30 dB4. Device data1 Units 4.1 Units1 Length unit6784. Device data2 Operating param.4. Device data3 Analog output 4.3 Analog output1 AO select4.3.1 AO selectLevel4.3 Analog output2 Level param.4.3.2 Level param.1 Level URV4.1.1 Length unitm4.1.1 Length unitmmMulti display92 x10chap6.fm Page 23 Tuesday, October 9, 2001 2:26 PM
Page 24 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmOperationExample 2The filling speed should be changed from 2.0 cm/min to 100 cm/min.Access the “Fill speed” parameter from the multi-display according to instructions on page page 19.The default setting appears in the displayEnable the programming.The second segment of the second displayline flashes.Set the digit to 1 with the control element.Select the decimal point with the controlelement.Press the control element twice so thattwo other places appear in front of the decimalpoint.Select the last decimal place withAnd end the input with the control element(Enter function)4.2.2.5. f i l l i n g s p e e+ 2.0 0 c m / m i n4.2.2.5. f i l l i n g s p e e+ 2 , 0 0 c m / m i n4.2.2.5. f i l l i n g s p e e+ 1 , 0 0 c m / m i n4.2.2.5. f i l l i n g s p e e+ 1 , 0 0 c m / m i n4.2.2.5. f i l l i n g s p e e+ 1 0 0 , 0 0 c m / m i n4.2.2.5. f i l l i n g s p e e+ 1 0 0 , 0 0 c m / m i n4.2.2 M e a s u r.c o n d i t5 f i l l i n g s p e e d1 x1 x2 x2 x1 xchap6.fm Page 24 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 25mmmmmParameters (HART)Parameters (HART)The parameter groups are followed by the parameters within each group. The parameter tables show the values you need to enter in bold type, followed by additional information when necessary. Factory settings are displayed after the parameter name, where applicable. Functional DimensionsRequired ParametersThe following parameters are absolutely essential for proper operation of the device. They apply to all applications and are required to make the system operational.1. Auto-SetupLanguage Local (F = English)Language of the local user interfaceValue EnglishDeustch 1 Nozzle height 2 Dead band 3 Raw value(measured) 4 Level (= calculatedvalue) 5 Lower range value 6 Lower limit 7 Upper limit 8 Upper range value 9 vessel heightchap6.fm Page 25 Tuesday, October 9, 2001 2:26 PM
Page 26 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)Length Unit (F = m)Units of measurementNozzle Height (F = 0 m)Length of nozzle from top of flange to top of vessel (see“Functional Dimensions” on page 25).Tank Height (F = 20 m)Height of vessel from bottom of nozzle to bottom of vessel (see “Functional Dimensions” on page 25)Level URV (F = 20 m)Full scale of level (see “Functional Dimensions” on page 25)Set the URV as the level above the bottom of the vessel (see “Functional Dimensions” on page 25) in the units system selected with Function 4.1.1. It corresponds to an output current of 20 mA.Level LRV (F = 0 m)Empty scale of level (see “Functional Dimensions” on page 25)Set the LRV as the level above the bottom of the vessel (see “Functional Dimensions” on page 25) in the units system selected with Function 4.1.1. It corresponds to an output current of 4 mA.ValuecmmmmftinValue numerical valueValue numerical valueValue numerical valueValue numerical valuechap6.fm Page 26 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 27mmmmmParameters (HART)Level damping (F = 1 s)Damping of level in sSet the damping of the level value in seconds. It acts on the analog output, the limit value monitor and the local display. For damping of the sensor signal, set Function 4.2.3:.Application Type (F - Liquid [store])Use of the vesselSelect Silo1 (solids) for tall, narrow silos. Select Silo 2 (solids) for large diameter silos typcially used for cement. In most cases you set one of the pre-specified applications here. The user vessels may adopt configurations which deviate from the factory settings. These are designed for special applications loaded at the factory or by service. the following parameters cannot be accessed when you set a user vessel: Parameter 4.2.2.2, Parameter 4.2.2.5, Parameter 4.2.2.6, Parameter 4.2.3.1 and Parameter 4.2.3.5Additional Parameters2. Display2.1: Multi-display (F = level in mSignal to noise ratio in db)Display of two measured values. Values determined in Parameter 4.5.1.1 (Line 1 Local) and in Parameter 4.5.1.4 (Line 2 Local).2.2: Level (F = m)Current level of measured medium (set unit using Length Unit in Auto-Setup).2.3: Volume (F = m3)Volume of measured medium (set unit using Parameter 4.1.2: Volume Unit).Value numerical valueValueLiquid (store)Liquid (process)Silo1 (solids)Silo2 (solids)User tank1User tank2chap6.fm Page 27 Tuesday, October 9, 2001 2:26 PM
Page 28 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)2.5: Current OutputValue of the analog output in mAWhen the device electronics are working properly, the displayed current value will correspond to the measured output current.2.6: Digital OutputState of digital output3. Diagnostics3.1: StatusHere you can access current status messages of the device. Parameter 3.1.1 is always accessible; other parameters (Parameter 3.1.x) appear in the appropriate order if they contain error messages.3.1.1: Wear3.1.1.1: Operating HoursTotal previous operating time of the device in hours (approximate value)3.1.1.2: Maximum Temperature (F = 26°C)Previous maximum temperature of the device3.1.1.3: Minimum Temperature (F = 26°C)Previous minimum temperature of the device3.1.1.4: AgingApproximate value for the previous life of the device in % (100% = approx. 10 years)This parameter outputs a calculated percentage which estimates the wear of the device due to aging.3.1.1.5: Hours > 85°CTotal time for which the maximum permissible temperature was exceeded, in hoursNote: This temperature must not exceed 85°C (185°F) or warranty may be void.chap6.fm Page 28 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 29mmmmmParameters (HART)3.1.x: Sensor, electronics, software, application, parameters, serviceThese parameters are only displayed if they contain an error message. The number of the menu items matches the number of defective functions and can range in extreme cases from 3.1.2 to 3.1.7.See“Troubleshooting” on page 62 for the individual error messages and possible remedies.3.1.x: SensorDiagnostic messages of the sensorand/or3.1.x: ElectronicsDiagnostic messages of the electronicsand/or3.1.x: SoftwareDiagnostic messages of the softwareand/or3.1.x: ApplicationDiagnostic messages to the applicationand/or3.1.x: ParametersDisplay of the false parametersand/or3.1.x: ServiceFor service purposes onlychap6.fm Page 29 Tuesday, October 9, 2001 2:26 PM
Page 30 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)3.2: Device Test3.2.1: Self-testCheck device stateThe device integrates the self-test routines in the ongoing measurements; it completes them after approx. 10 seconds. It confirms a successful self-test with the display “OK” – “not OK” signals an error. Read out the error type according to Parameter 3.1.x.3.2.2: Display testVisual check of LCDYou can test the LCD with this function. The display first goes blank for 5 seconds and then lights up for another 5 seconds so that you can determine whether individual display points have failed.3.3: SimulationThis parameter can support testing the correct functions of the connections during commissioning or maintenance of the device. With the two sub-parameters, you can temporarily replace the measured values at the analog and digital output with known simulated output values.3.3.1: Simulate AO (F = 4 mA)Simulation of the analog output signalWhen this parameter is accessed and a value is entered, the device sets the defined current value which can be validated. The parameter is ended after pressing so that the analog output again gives the measured value.Value4 mA10 mA12 mA20 mAError signalNote: The “Simulation” function influences output to the control system.chap6.fm Page 30 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 31mmmmmParameters (HART)3.3.2: Simulate DO (F = End)Simulation of the digital output signalSelect the applied output value “Relay on” or “Relay off”. The function is ended after pressing so that the digital output again gives an alarm/limit.3.4: Sensor VariablesYou can read out device-internal data with this function. The displayed values depend on the respective application. You can access the following data:3.4.1: Raw Value (for service purposes only)Distance from the flange to measuring mediumThe measured distance from the flange to the surface of the measuring medium.3.4.2: Echo AmplitudeMeasure of quality of reflectionThis dimensionless value is an absolute measure of the strength of reflection at the measuring medium. Its display can be evaluated as follows:•x > 1: very good•1 > x > 0.5: good•0.5 > x > 0.05: satisfactory•x < 0.05: uncertain3.4.3: S/N RatioSignal-to-noise ratio of the measured value in dBS/N Ratio provides a relative measure of the strength of reflection of the measuring medium in dB. Its display can be evaluated as follows:•x > 20: very good•20 > x > 10: good•x < 10: satisfactoryValueRelay onRelay offEndchap6.fm Page 31 Tuesday, October 9, 2001 2:26 PM
Page 32 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)3.4.4: ValidityValidity of the measured value in %This parameter provides a percentage measure of the certainty that the displayed measured value corresponds to the real level and does not represent a multiple echo or a fixed target. Its display can be evaluated as follows:•x > 70: very good•70 > x > 50: good•50 > x > 20: uncertain•x < 20: no plausible measured value3.4.5: SensorTempSensor temperature4. Device Data4.1: Units4.1.1: Length Unit = Parameter 1.24.1.2: Volume unit (F = m3)Valuebblyd3ft3in3bushbbl (liq)lm3hLGalImpGalchap6.fm Page 32 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 33mmmmmParameters (HART)4.1.3: Temperature Unit (F = °C)Unit of the sensor temperature4.1.4: Other units (F = SI)Units system for all other unitsWith this function you determine whether you want to enter the operating parameters (see Parameter 4.2) in SI or in British Imperial (US/UK) units. The selected units of the measured value output and sensor temperature as well as the decimal point are not influenced by this setting.4.2: Operating ParametersWith this parameter, you can define the parameters of your vessel, the measuring medium and the calculation of the measured signal. Signal-specific default settings such as the failure signal or the upper current limit of the analog output signal are assigned to the functions of the respective outputs, see Parameters 4.3 and 4.4.4.2.1: Tank Geometry4.2.1.1: Nozzle Height = Parameter 1.34.2.1.2: Tank Height = Parameter 1.44.2.1.3: Stilling Pipe? (F = no)Stilling pipe available?By selecting the setting “yes” or “no”, you specify whether the device is mounted on a stilling pipe. If you have selected “yes”, the Parameter 4.2.1.3.2 is enabled in which you can specify the internal diameter of the stilling pipe.Value°C°FKValue SI unitUS/UK unitValue yesnochap6.fm Page 33 Tuesday, October 9, 2001 2:26 PM
Page 34 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)4.2.1.3: Pipe Diameter (F = 100 mm)Internal diameter of the stilling pipe4.2.2: Measuring Conditions4.2.2.1: Application Type (F - Liquid [store])Use of the vesselSelect Silo1 (solids) for tall, narrow silos. Select Silo 2 (solids) for large diameter silos typically used for cement. In most cases you set one of the pre-specified applications here. The user vessels may adopt configurations which deviate from the factory settings. These are designed for special applications loaded at the factory or by service. the following Parameters cannot be accessed when you set a user vessel: Parameter 4.2.2.2, Parameter 4.2.2.5, Parameter 4.2.2.6, Parameter 4.2.3.1 and Parameter 4.2.3.5.4.2.2.2: Surface (F = wavy)Surface structure of the measuring medium. Not displayed if a user vessel is selected in Parameter 4.2.2.1.This parameter is not displayed when a user vessel is selected in Parameter 4.2.2.1. In the case of poorly reflecting measuring media, you may be able to improve the measuring results by setting a different surface structure here. If your measuring medium forms waves more than 1 cm in height, you should select the “wavy” setting. The ”turbulent” setting is recommended for waves > 10 cm. The default setting is the “wavy” surface structure.Value numerical valueValueLiquid (store)Liquid (process)Silo1 (solids)Silo2 (solids)User tank1User tank2Valuesmoothwavyturbulentchap6.fm Page 34 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 35mmmmmParameters (HART)4.2.2.3: Dead band (F = 0.26 m)Area below the flange in which measured values are ignored.Specification of a *dead band in the units system selected according to Parameter 4.1.5 defines a minimum distance from the flange which the measuring medium must have for the device to accept the measured values as valid. This suppresses reflective interference generated by e. g. the nozzle, close obstacles, or the antenna.4.2.2.4: Correction Factor (F = 1.0)Correction factor for physical measuring influencesThe propagation time of the microwaves between the antenna and the measuring medium changes slightly depending on the pressure inside the vessel. If this pressure is constant, however, it can be included in the evaluation according to the equation:K = correction factor, p = pressure inside the vessel in bar, Tgas = gas temperature in °C, εr, G as = dielectric of the overlying gas, e.g. ερ, air = 1.00059Enter the correction factor K as a dimensionless value.4.2.2.5: Filling Speed (F = 200 mm/min)Typical speed of change of the level. Not displayed if user vessel is selected in Parameter 4.2.2.1.This Parameter is not displayed when a user vessel is selected in Parameter 4.2.2.1. When you determine that the displayed measured value does not follow the change in the height of the level in the vessel, you can enter a value for the speed with which it generally changes. This assigns a greater probability to measuring targets which move at this speed.Value numerical value, Minimum value = Length of the antennaValue numerical valueValue numerical valueNote: The dead band should exceed the antenna’s length.K11εrGas,1–()+273 p⋅TGas 273+--------------------------⋅-------------------------------------------------------------------------=chap6.fm Page 35 Tuesday, October 9, 2001 2:26 PM
Page 36 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)If the display does not follow the level height continuously but in abrupt jumps, you should choose a higher filling speed. If multiple echoes are indicated during filling/emptying a vessel, select a lower filling speed. In the case of very low filling speeds (a few mm/min) switch off Parameter 4.2.3.3. If different filling/emptying speeds occur, select the higher speed.4.2.2.7: Failsafe Level (F = Hold Continuously)Selects the default measurement in the event that the failsafe timer expires4.2.2.8: Failsafe Timer (F = 10 min)Sets the time delay, in minutes, before entering failsafe level. The failsafe timer will begin when there is a loss of echo condition. This loss of echo condition will occur when there is no signal avaliable above the Auto False Echo Suppression threshold as defined in Parameter 4.2.3.9.4.2.2.9: Range Extension (F = 3 m)Sets the distance below the vessel height included in the evaluation4.2.3: Sensor ParameterHere you can view and change the sensor parameters which you have selected according to parameter 4.2.2.Values100 %0 %Hold ContinuouslyValues 1 min2 min, etc.Values numericalNote: The factory settings for the user vessels are not editable.chap6.fm Page 36 Tuesday, October 9, 2001 2:26 PM
7ML19985FH01 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT Page 37mmmmmParameters (HART)4.2.3.1: Sensor Damping (F = 10 s)Averaging of measuring signal. Not displayed if a user vessel is selected in parameter 4.2.2.1.This parameter is not displayed when a user vessel is selected in parameter 4.2.2.1. The sensor damping influences the evaluation of the measuring signal. If the level generally only changes slowly and continuously, a time constant set here can improve the measuring accuracy and the validity in poorly reflecting measuring media or those with a restless surface. The sensor damping must always be smaller than the interval of the time of change of the level (e.g. 1 mm/10 s), because too high a value would have a negative influence on the measuring result.Enter the damping in seconds.4.2.3.2: Multiple Echo (F = on)Evaluate multiple echoThe multiple echo evaluation suppresses multiple reflections by assigning them a lower probability than the measuring signal.4.2.3.3: Echo Motion (F = off)Evaluate echo motionDynamic processes in the vessel are included in the evaluation of the measuring targets. The typical filling speed can be set in Parameter 4.2.2.5. If, however, the measured value still does not follow the level height, switching off the parameter “echo motion” could possibly improve the result.Value numericalValue onoffValue onoffNote: Specification of a damping directly influences the evaluation of the measuring signal. If you only want to dampen the calculated outputs at the analog output, you should set the damping of level or volume described in Function 4.2.4.4.chap6.fm Page 37 Tuesday, October 9, 2001 2:26 PM
Page 38 SITRANS LR 400 – INSTRUCTION MANUAL DRAFT 7ML19985FH01mmmmmParameters (HART)4.2.3.4: Window Tracking (F = on)A window follows the measured value which it is forced to track. The window size is calculated from the set filling speed. The parameter “window tracking” would be switched off for applications where the SITRANS LR 400 is unable to keep up to level changes.4.2.3.5: Tank Empty Detection (F = on)Sometimes in vessels with a parabolic or conical bottom there is no signal reflection when the vessel is empty. The vessel empty detection recognizes this state and displays the measured value for an empty vessel. If the measuring medium’s signal disappears occasionally (foam, turbulence, etc.), it may help to switch this parameter off.4.2.3.6: Auto Fix Distance (F = off)Automatic fixed target detectionFixed targets are set automatically and their echoes suppressed. Automatic setting of the fixed targets depends on the set filling speed. However, the measured value display may trace the level correctly but jump to an incorrect value, i.e. a multiple echo, at constant level after a longer time. In that case you may switch off the automatic fixed target detection. It is suggested that Auto False Echo Suppression (4.2.3.9 and 4.2.3.A) be used instead of Auto Fix Distance (4.2.3.6).4.2.3.7: Fix Distance ListManual input of up to nine fixed targetsHere you can enter the distances from the flange of up to nine known fixed targets in any order in the units system selected according to parameter 4.1.1. The fixed targets of this list are considered to be accurate within ±15 cm.Value onoffValue onoffValue onoffValue numerical valuechap6.fm Page 38 Tuesday, October 9, 2001 2:26 PM

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