Siemens SITRANS LR250 Instruction Manual
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Siemens SITRANS LR250 Instruction Manual

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Table of Contents ...............................................................................................................i
Safety Notes ...........................................................................................................................................1
Safety marking symbols ............................................................................................................1
The Manual ............................................................................................................................................1
FCC Conformity ......................................................................................................................................2
Application Examples .................................................................................................................2
Support ....................................................................................................................................................2
Abbreviations and Identifications ...........................................................................................2
SITRANS LR250 ..................................................................................................................4
Applications ..................................................................................................................................5
SITRANS LR250 System Implementation ..............................................................................6
Programming ................................................................................................................................6
SITRANS LR250 Approvals and Certificates .........................................................................6
Specifications ....................................................................................................................7
SITRANS LR250 ..................................................................................................................................... 7
Power............................................................................................................................................. 7
Performance................................................................................................................................. 7
Interface ........................................................................................................................................ 8
Mechanical................................................................................................................................... 8
Environmental .............................................................................................................................. 9
Process.......................................................................................................................................... 9
Approvals (verify against device nameplate)..................................................................... 10
Programmer (infrared keypad) .............................................................................................. 10
Installation ........................................................................................................................11
Mounting location ...............................................................................................................................12
Location on a nozzle .................................................................................................................14
Polarization reference point ...................................................................................................14
Mounting Instructions .......................................................................................................................15
Mounting: Threaded Version .................................................................................................15
Horn Location on Nozzles ....................................................................................................... 16
Mounting: Stillpipe or Bypass (Sidepipe) ............................................................................16
Pipe requirements..................................................................................................................... 16
Mounting: Horn with Extension .............................................................................................18
SITRANS LR250 Dimensions ..................................................................................................19
Threaded Horn Antenna.......................................................................................................... 19
Dimensions: Horn with extensions ....................................................................................... 20
Dimensions: Flanged Horn...................................................................................................... 21
Dimensions: Flanges ..........................................................................................................................22
Wiring ................................................................................................................................24
Power .....................................................................................................................................................24
Connecting SITRANS LR250 .............................................................................................................24
Wiring setups for hazardous area installations ..........................................................................25
Intrinsically Safe wiring ........................................................................................................... 25
Non-incendive wiring (only for USA/Canada) ....................................................................28
Wiring drawing (Intrinsically Safe: FM/CSA) ...............................................................................29
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  • Page 1: Table Of Contents

    Application Examples .........................2 Support ..............................2 Abbreviations and Identifications ...................2 SITRANS LR250 ........................4 Applications ..........................5 SITRANS LR250 System Implementation ................6 Programming ..........................6 SITRANS LR250 Approvals and Certificates .................6 Specifications ........................7 SITRANS LR250 ............................. 7 Power............................. 7 Performance..........................7 Interface ............................8 Mechanical........................... 8 Environmental ..........................
  • Page 2 PROGRAM mode display......................48 Navigation view......................... 48 Programming via the handheld programmer ................49 Echo Profile Viewing ........................51 Operating SITRANS LR250 via SIMATIC PDM ............52 Functions in SIMATIC PDM ......................52 SIMATIC PDM Rev. 6.0, SP2 Features .................52 Accessing Functions ........................52 Online Display ..........................53 Changing parameter settings using SIMATIC PDM ............53...
  • Page 3 Horn Antenna or Wave Guide DN Hole Pattern, PN16 ..........113 Appendix F: Loop power ....................114 Typical Connection Drawing ....................114 Allowable operating area of SITRANS LR250 ..............114 Curve 1 (General Purpose, Intrinsically Safe, Non-incendive) ........114 Curve 2 (Flameproof, Increased Safety, Explosion-proof) ..........115 Startup Curve ...........................115...

  • Page 5: Safety Notes

    SITRANS LR250. • This manual applies to the SITRANS LR250 (HART) only. This manual will help you set up your SITRANS LR250 for optimum performance. We always welcome suggestions and comments about manual content, design, and accessibility.

  • Page 6: Fcc Conformity

    Application Examples The application examples used in this manual illustrate typical installations using SITRANS LR250. Because there is often a range of ways to approach an application, other configurations may also apply. In all examples, substitute your own application details. If the examples do not apply to your application, check the applicable parameter reference for the available options.
  • Page 7 20 mA above which no PV is Upper Sensor Limit anticipated 100% is most commonly set to 20 mA, and 0% to 4 mA: however, the settings can be reversed. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 3...

  • Page 8: Sitrans Lr250

    . Signals are processed using Process Intelligence which has been field-proven in over 500,000 applications worldwide (ultrasonic and radar). SITRANS LR250 is available in numerous versions, several of which are approved for use in hazardous areas. The approval rating is shown on the device nameplate.

  • Page 9: Applications

    Notes: • Please refer to device nameplate for approval information. • SITRANS LR250 is to be used only in the manner outlined in this manual, otherwise protection provided by the equipment may be impaired. SITRANS LR250 is designed to measure liquid levels in a variety of applications: •...

  • Page 10: Sitrans Lr250 System Implementation

    HART communicator Programming SITRANS LR250 carries out its level measurement function according to the set of built-in parameters. You can make parameter changes via the hand programmer, via a PC using SIMATIC PDM, or via a HART Handheld Communicator. SITRANS LR250 Approvals and Certificates...

  • Page 11: Specifications

    Specifications Siemens Milltronics makes every attempt to ensure the accuracy of these Note: specifications but reserves the right to change them at any time. SITRANS LR250 Power Nominal 24 V DC at Appendix J: For other configurations, see the chart in max.

  • Page 12: Interface

    SITRANS LR250 Dimensions on page 19 Near Range (Blanking) on page 108 for more details. Display quality will be degraded in temperatures below –25 °C (–13 °F) and above +65 °C (+149 °F). Page 8 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 13: Environmental

    For more detail, or for other Maximum Process Temperature Chart Process Pressure/ configurations, see on page 111, and Temperature derating curves beginning on page 112. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 9...

  • Page 14: Approvals (Verify Against Device Nameplate)

    Class I, Div. 2, Groups A, B, C, D Programmer (infrared keypad) Siemens Milltronics Infrared IS (Intrinsically Safe) Hand Programmer for hazardous and all other locations (battery is non-replaceable) • approval ATEX II 1 G, EEx ia IIC T4, certificate SIRA 01ATEX2147 FM/CSA: Class I, Div.

  • Page 15: Installation

    • Installation shall only be performed by qualified personnel and in accordance with local governing regulations. • SITRANS LR250 is to be used only in the manner outlined in this manual, otherwise protection provided by the device may be impaired.

  • Page 16: Mounting Location

    (The concavity of the top can focus echoes into the centre, giving false readings.) Under certain circumstances, it may be acceptable to mount SITRANS LR250 at Note: the centre of a flat-topped tank: please discuss this with your Siemens Milltronics representative.
  • Page 17 21 • For more detail on false echoes, beam Appendix F: Technical width Reference on page 102. GRAPHIC TO BE UPDATED 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 13...

  • Page 18: Location On A Nozzle

    For best results on a tank with obstructions, or a stillpipe with openings, orient the front Mounting: Stillpipe or Bypass or back of the device toward the obstructions (see (Sidepipe) on page 117 for an illustration.) polarization reference point display Page 14 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 19: Mounting Instructions

    Before inserting SITRANS LR250 into its mounting connection, check to ensure the threads are matching, to avoid damaging them. Simply screw SITRANS LR250 into the process connection, and hand tighten, or use a wrench. For pressure applications, it will be necessary to use PTFE tape (or other appropriate thread sealing compound) and tighten the process connection beyond hand tight.

  • Page 20: Horn Location On Nozzles

    Mounting on a bypass align display Mounting on a stillpipe window with vents align display window optimum with diameter stillpipe 80 mm (3”) slots GRAPHIC TO BE UPDATED Page 16 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 21 Mounting: Horn with Extension Use this combination if the nozzle is long and the diameter is small. A 100 mm (4") horn extension is available. GRAPHIC TO BE UPDATED 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 17...

  • Page 22: Mounting: Horn With Extension

    • Process temperature and pressure capabilities are dependent upon information on the process device tag. Reference drawing listed on the tag is available on our website. Go to the product page for SITRANS LR250 at: xxxxxxx. • Signal amplitude increases with horn diameter, so use the largest practical size.
  • Page 23 Dimensions: Horn with extensions 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 19...

  • Page 24: Dimensions: Horn With Extensions

    • Process temperature and pressure capabilities are dependent upon information on the process device tag. Reference drawing listed on the tag is available on our website at www.siemens.com/processautomation, on the product page for SITRANS LR250, under Process Connection Specifications. • Signal amplitude increases with horn diameter, so use the largest practical size.

  • Page 25: Dimensions: Flanged Horn

    O.D. 20 mm (0.8”), nominal horn/waveguide mounting holes (threaded) bolt hole GRAPHIC TO BE UPDATED circle Ø process side See chart on page 23 for further details on flange sizes. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 21...
  • Page 26 22 mm 50 mm JIS 10K 155 mm 120 mm 19 mm 80 mm JIS 10K 185 mm 150 mm 19 mm 100 mm JIS 10K 210 mm 175 mm 19 mm Page 22 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 27 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 23...

  • Page 28: Wiring

    Allen key to loosen the locking ring. locking ring threaded connection plug cable gland (or NPT cable entry) Depending on the approval rating, glands and plugs may be supplied with your instrument. Page 24 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 29: Wiring Setups For Hazardous Area Installations

    Class I, Div. 1, Groups A, B, C, D US/Canada Class II, Div. 1, Groups E, F, G Class III If cable is routed through conduit, use only approved suitable-size hubs for waterproof applications. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 25...
  • Page 30 Profibus Interface - 8 x 4...20mA Input Module AI930N 4 x Analog Input HART Module (for S900) Siemens SM331 2 x Analog Input HART Module (for ET200M) Siemens SM331 4 x Analog Input Module (for ET200M) Page 26 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 31 Using Vworking and Rworking, confirm that operation is within the shaded area of Loop Voltage versus Loop Resistance the graph on page 111 Active barriers (repeating barriers) Manufacturer Part Number 7206 Stahl 9001/51-280-110-14 Pepperl+Fuchs KSD2-CI-S-Ex Pepperl+Fuchs KFD2-STC3-Ex1 E02009 - verify E02010 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 27...

  • Page 32: Non-Incendive Wiring (Only For Usa/Canada)

    For power demands see incendive) on page 111. Wiring drawing (Non-incendive: FM/CSA) • For wiring requirements download drawing number 23650637 from the product page of our website at: #####, or see page 30. Page 28 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 33: Wiring Drawing (Intrinsically Safe: Fm/Csa)

    Wiring drawing (Intrinsically Safe: FM/CSA) TO BE REPLACED WITH FLIP-OUT PAGE 23650653 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 29...

  • Page 34: Wiring Drawing (Non-Incendive: Fm/Csa)

    RADAR 20 / JULY / 2005 R. CLYSDALE SITRANS LR 250 T. LITTLE CLASS I, Div. 2 S. NGUYEN CONNECTION DRAWING PETERBOROUGH FOR INTERNAL USE ONLY 23650637 2365063700 1 : 1 Page 30 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 35: Instructions Specific To Hazardous Area Installations

    This shall be considered when the SITRANS LR 250 is being installed in locations that specifically require group II, category 1G equipment. (continued on next page) 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 31...
  • Page 36 Si – 8.5%, Fe – 1.3%, Cu – 3.5%, Mn – 0.5%, Mg – 0.1%, Ni – 0.1%, Zn – 3%, Sn – 0.35%, others – 0.5%, Al - balance In applications requiring category 1G or 1/2G equipment, SITRANS LR250 must not be exposed to materials to which the wetted parts of the instrument are not resistant.

  • Page 37: Quick Start

    Activating SITRANS LR250 Keep infrared devices such as laptops, cell phones, and PDAs, away from Note: SITRANS LR250 to prevent inadvertent operation. Power up the instrument. SITRANS LR250 automatically starts up in Measurement (RUN) mode. Measurement mode (RUN mode) Normal operation 1 –...

  • Page 38: Programming Sitrans Lr250

    For detailed information see on page 94. or Parameter Reference on page 41. • To program SITRANS LR250 using the Quick Start wizard, follow the instructions below. The handheld programmer and PROGRAM mode display Notes: Appendix F: Local Operation Interface •...

  • Page 39: Quick Start Wizard Via The Handheld Programmer

    1.0 m/minute Options FAST 10.0m/minute Use a setting just faster than the maximum filling or emptying rate (whichever is greater). Slower settings provide higher accuracy: faster settings allow for more level fluctuation 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 35...
  • Page 40 In order to save the Quick Start settings it is necessary to select Yes to apply changes. YES, NO Options Press Mode to return to Measurement mode. SITRANS LR250 is now ready to operate. SITRANS LR 250 The point to which all of the above parameters are referenced. See Dimensions on page 14.

  • Page 41: Level Application Example

    Save new settings. Auto False Echo Suppression If SITRANS LR250 displays a false high level, or the reading is fluctuating between the correct level and a false high level, you can use the Auto False Echo Suppression 2.2.5. TVT (Auto False Echo Suppression) parameters to prevent false echo detection.

  • Page 42: Quick Start Wizard Via Simatic Pdm

    You will need the DD for SIMATIC PDM version 6.0 with SP2. You can locate the DD in Device Catalog, under Sensors/Level/Echo/Siemens Milltronics/SITRANS LR250. If you do not see SITRANS LR250 under Siemens Milltronics, you can download the DD from the product page of our website at: https://pia.khe.siemens.com/index.asp?Nr=7427, under Downloads.

  • Page 43: Quick Start Wizard Steps

    The layout of the dialog boxes shown may vary according to the resolution Note: setting for your computer monitor. Launch SIMATIC Manager, create a new project, open the menu Device – Quick Start, and follow steps 1 to 5. Quick Start 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 39...
  • Page 44 Step 1 – Identification Click NEXT to accept the default values. (Description, Message, and Installation Date fields can be left blank.) Step 2 – Application Select the application type, and click NEXT. Page 40 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML1998JE01...
  • Page 45 Step 3 – Vessel Shape Select the vessel shape, and click NEXT. Step 4 – Range Set the parameters, and click NEXT. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 41...

  • Page 46: Using Linearization Via The Quick Start Wizard

    100% and 0% levels must be entered. The breakpoints can be ordered from top to bottom, or the reverse. Ex ample: Level Breakpoint Breakpoint Level value Volume value value number Number 3000 8000 values are for example purposes only. Note: Page 42 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML1998JE01...
  • Page 47 In Step 3 – Vessel Shape, choose the vessel shape option Linearization Table and click Linearization. linearization a. In the Linearization window click on the appropriate Breakpoint tab to open the dialog window. Breakpoints 1 - 8 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 43...
  • Page 48 Reset resets values to the values in the offline table. Note: c. In the Step 3 window, click NEXT. In Step 4 – Range Setup, enter parameter values, and click NEXT. Page 44 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML1998JE01...
  • Page 49 In Step 5 – Summary, check parameter values. Click BACK to return and revise values, or FINISH to transfer values to the device. The message Quick Setup was successful will appear. Click OK. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 45...

  • Page 50: Local Operation Interface

    S: 0 LOE If more than one fault is present, the status indicator and text for each fault alternate at General Fault Codes 2 second intervals. See on page 79 for a list. Page 46 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 51: Key Functions In Measurement Mode

    Right ARROW opens PROGRAM Opens the top level menu. mode. Up or Down ARROW toggles between LCD displays measured value in either linear units or linear units and percent. percent. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 47...

  • Page 52: Program Mode Display

    FAR RANGE • A deeper band indicates fewer items. • A band halfway down the menu bar indicates the current item is halfway down the list. Page 48 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 53: Programming Via The Handheld Programmer

    • Because the settings are inter-related, the initial Quick Start parameter values are not default values and do not necessarily reflect the current device configuration. • SITRANS LR250 automatically returns to Measurement mode after a period of inactivity in PROGRAM mode (between 25 seconds and 10 minutes, depending on the menu level).
  • Page 54 - Changes from Edit to Navigation mode Right - Moves cursor one space to the right ARROW Numeric - or with cursor on Enter sign, accepts the data editing and changes from Edit to Navigation mode Page 50 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 55: Echo Profile Viewing

    Right ARROW to update the profile. transmit icon, unselected exit icon, selected Press Down ARROW to select the Exit exit icon, unselected icon, then Right ARROW to return to previous menu. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 51...

  • Page 56: Operating Sitrans Lr250 Via Simatic Pdm

    Note: starting on page 61. SIMATIC PDM is a software package used to commission and maintain SITRANS LR250 and other process devices. Please consult the operating instructions or online help for details on using SIMATIC PDM. (You can find more information at www.fielddevices.com: go to Products and Solutions >...

  • Page 57: Online Display

    For a complete list of parameters, see on page 61. Note: Launch SIMATIC PDM, connect to SITRANS LR250, and upload data from the device. Adjust parameter values in the parameter value field then press Enter. The status fields read Changed..

  • Page 58: Configuring A New Device

    You will need the DD for SIMATIC PDM version 6.0 with SP2. You can locate the DD in Device Catalog, under Sensors/Level/Echo/Siemens Milltronics/SITRANS LR 460. If you do not see SITRANS LR 460 under Siemens Milltronics, you can download the DD from the product page of our website at: https://pia.khe.siemens.com/index.asp?Nr=14655, under Downloads.

  • Page 59: Reset

    Use this parameter to learn a new TVT curve, to avoid false echoes caused by Auto False-Echo Suppression obstructions. See on page 71 for a more detailed Auto False Echo Suppression explanation, and on page 74 for instructions 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 55...
  • Page 60 Change the position of the X cursor on the TVT curve using the Point+ and Point– buttons: raise and lower the curve using Offset+ and Offset–. • Alternatively, enter values for Point and Offset directly into the dialog boxes. Page 56 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 61: Echo Profile Saving

    • Double click each axis and record the Xscale and Data Scale values, so that you can restore the default view by resetting to these values. Open the menu View – Trend trend line 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 57...

  • Page 62: Application Examples

    High Calibration Point is 4.5 m from the 4.5 m vessel bottom. The maximum rate of filling or emptying is about 0.2 m/min. In the event of a loss of echo, SITRANS LR250 Low Cal is to go into Failsafe Hi after 2 minutes. 0% Level...

  • Page 63: Example 2: Horizontal Vessel With Volume Measurement

    0.2 m/min. Selecting tank shape i at 2.2.2.1 (Vessel Shape), and entering values for A and L, will give a volume reading instead of level. In the event of a loss of echo, SITRANS LR250 is to go into Failsafe Hi after 2 minutes. Sensor...
  • Page 64 For more details see on page 75 and False Echo Suppression Auto False-Echo on page 74. For an explanation, see Suppression on page 108. Return to Measurement: press Mode to start normal operation. Page 60 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 65: Parameter Reference

    • Do not use the wizard to modify individual parameters. • You can access the Quick Start wizard either via SIMATIC PDM, or via the handheld programmer. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 61...
  • Page 66 The point from which level measurement is referenced. See sions Appendix D: Flange Adapter Ver- on page 14 for the standard rod antenna. See sions on page 83 for other configurations. Page 62 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 67 1.5" horn Options 2" horn 3" horn 4" horn Use this parameter to reset the Near Range (blanking) distance, if your horn has to be replaced by one of a different type. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 63...
  • Page 68 (whichever is greater). Slower settings provide higher accuracy: faster settings allow for more level fluctuation. 2.2.1.4. Sensor Units Units the sensor is measuring in. m, cm, mm, ft, in Values Default: m Page 64 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 69 The point from which level measurement is referenced. See sions Appendix D: Flange Adapter Ver- on page 14 for the standard rod antenna. See sions on page 83 for other configurations. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 65...
  • Page 70 Since pipe dimensions may vary slightly, the propagation factor may also vary. The value produced by the echo processing which represents the distance from sen- sor reference point to the target. Page 66 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 71 If "none" is selected, no volume conversion is performed. Select the vessel shape matching the monitored vessel or reservoir. Vessel Shape Description Also required no volume calculation None required flat end horizontal maximum volume cylinder sphere maximum volume 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 67...
  • Page 72 A maximum volume, flat sloped bottom dimension A maximum volume, parabolic end dimension A, horizontal cylinder dimension L linearization table maximum volume, (level/volume level breakpoints, breakpoints) volume breakpoints Page 68 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 73 Level values are defined in sensor units. Volume units are defined by the user but are not explicitly stated in the SITRANS LR250. Range: 0.0000 to 99999 (m, cm, mm, ft, in) Level Values Default: 0.0...
  • Page 74 Go to > Volume breakpoints > Table 1-8 and enter values for level and volume breakpoints in table. Repeat step c till values have been entered for all required breakpoints using other tables as required. Page 70 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 75 When Echo Confidence exceeds the Confidence Threshold, the echo is evaluated. Range: 0 to 99 Values Default: 10 Related LOE Timer Parameters Use this feature when an incorrect material level is reported. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 71...
  • Page 76 2.2.4.2. Sampling 2.2.4.2.1. Echo Lock Ensure the agitator is always running while SITRANS LR250 is Note: monitoring the vessel, to avoid stationary blade detection. Selects the measurement verification process. Lock Off Maximum Verification Options Material Agitator Total Lock Fill Rate...
  • Page 77 2.2.4.5.2. Strength Displays the absolute strength (in dB above 1 µV rms) of the echo selected as the measurement echo. –20 to 99 Values (view only) Open the menu View – Profile. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 73...
  • Page 78 • If the vessel contains an agitator, the agitator should be running. First SITRANS LR250 learns the echo profile. Then the learned profile, or part of the learned profile, is used to screen out false echoes. See Display before Auto False Echo Suppression on page 75 for examples.
  • Page 79 Subtract 0.42 m (16.5") from this distance, and enter the result. Display before Auto False Echo Suppression Default Window Hover Level Echo Marker Example after Auto False Echo Suppression learned TVT curve liquid level false echo false echo 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 75...
  • Page 80 2.2.7.2. Fill Rate Defines the maximum rate at which the reported sensor value is allowed to increase. Allows you to adjust the SITRANS LR250 response to increases in the actual material level. Fill Rate is automatically updated whenever Response Rate is altered.
  • Page 81 2.2.7.3. Empty rate Defines the maximum rate at which the reported sensor value is allowed to decrease. Adjusts the SITRANS LR250 response to decreases in the actual material level. Empty Rate is automatically updated whenever Response Rate is altered. 0.0000 to 99999 Range: m / min.
  • Page 82 HART network. • mA Output Function must be set to Manual before you can modify the mA Output Value (2.3.1.1). Remember to restore your previous setting after using mA Output Function. Page 78 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 83 Output Function Parameters Enter the reading that is to correspond to a 20 mA output. Units are defined in Sensor units for Level, Space, or Distance. Units are unspecified for Volume 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 79...
  • Page 84 4. Enter this value in 20 mA Output Trim. 5. Restore mA Output Function to previous setting. 6. Confirm that the mA output is as expected. Page 80 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 85 In PROGRAM mode, navigate to LEVEL METER > DIAGNOSTICS DIAGNOSTICS > ECHO PROFILE. FAULT RESET ECHO PROFILE ECHO PROFILE b. Press Right ARROW to request a profile. MEAS. VALUES REMAIN DEV. LIFE 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 81...
  • Page 86 3.15.1. Total Device Operating Time Read only. Displays the amount of time the device has been operating. 3.15.2. Remaining Device Lifetime Read only. The sum of Total Expected Device Life less Total Device Operating Time. Page 82 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 87 Open the menu , click on Remaining Device Lifetime. Device – Maintenance b) Select either or both of Enable Maintenance Required Alert and Enable Maintenance Demanded Alert. Click Write to accept the changes. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 83...
  • Page 88 3.16.1. Total Sensor Operating Time Read only. Displays the amount of time the sensor has been operating. 3.16.2. Remaining Sensor Lifetime Read only. The sum of Total Expected Device Life less Total Device Operating Time. Page 84 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 89 Open the menu Device – Maintenance, and click on Remaining Device Lifetime. b) Select either or both of Enable Maintenance Required Alert and Enable Maintenance Demanded Alert. Click Write to accept the change. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 85...
  • Page 90 To acknowledge an alert via PDM: a) Open the menu View – Device Status and click on the tab Maintenance. b) In the Device Lifetime section, modify values as required. Click Write to accept the changes. Page 86 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 91 The date of manufacture of the SITRANS LR250 (yy mm dd). 4.8. Software Revision Corresponds to the software or firmware that is embedded in the SITRANS LR250. 4.9. Loader Revision Corresponds to the software used to update the SITRANS LR250.
  • Page 92 Default: 1.0 years 4.17.6. Maintenance Status Read only. Displays the status of the Maintenance Alerts 0 No maintenance alerts active 1 Maintenance Required Alert active Values 2 Maintenance Demanded Alert Active Page 88 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 93 Range: 0 to 20 years Values Default: 0.019 years 4.18.4. Alert Activation Select limits to be activated. * Timer off On - no limits Values On - limits 1 and 2 On - limit 2 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 89...
  • Page 94 Range: 0 to 15 Values Default: 0 5.2. Communication Control Enables the read/write access to parameters via remote communications Read Only Read Write Options Restricted Page 90 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 95 • Default setting for 6. 1 (Lock) is Unlocked. • After a new value is stored in Unlock Value (6.2), that value will be recalled after a Factory Reset. • Consult your Siemens Milltronics representative if you have forgotten the unlock value. 7. Language Selects the language to be used on the LCD.
  • Page 96 Page 92 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 97: Appendix A: Alphabetical Parameter List

    (2.2.1.15.) on page 67 Lock (6. 1 .) on page 91 Low Calibration Pt. (2.2.1.6.) on page 65 mA Output Function (2.3.1.2.) on page 78 mA Output Value (2.3.1.1.) on page 78 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 93...
  • Page 98 (6.2.) on page 91 Vessel Shape (2.2.2.1.) on page 67 Volume Breakpoints (2.2.3.) on page 69 Volume Breakpoints (2.2.3.) on page 69 Volume Measurement (2.2.8.5.) on page 77 Window1 (2.2.4.2.6.) on page 72 Page 94 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 99: Appendix B: Programming Chart

    High Calibration Pt. (2.2.1.7.) Language (7.) Level Offset (2.2.1.15.) Lock (6.1.) Low Calibration Pt. (2.2.1.6.) mA Output Function (2.3.1.2.) mA Output Value (2.3.1.1.) Material Measurement (2.2.8.2.) Maximum mA limit (2.3.1.6.) Maximum Volume (2.2.3.1.) 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 95...
  • Page 100 Sensor Units (2.2.1.4.) Software Revision (4.8.) Space Measurement (2.2.8.3.) Strength (2.2.4.5.2.) TVT Hover Level (2.2.5.1.) Unlock value (6.2.) Vessel Shape (2.2.2. 1 .) Volume Breakpoints (2.2.3.) Volume Measurement (2.2.8.5.) Window1 (2.2.4.2.6.) Page 96 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 101: Appendix C: Troubleshooting

    FAQs for SITRANS LR250, or contact your local Siemens Milltronics representative. Specifically: If you try to set a SITRANS LR250 parameter via remote communications, but the parameter remains unchanged: • Some parameters can only be changed when the device is not scanning. Try putting the device in PROGRAM mode using the operating mode function.

  • Page 102: General Fault Codes

    Sensor is nearing its lifetime limit Replacement is recommended. according to the value set in Maintenance Required Limit. Sensor is nearing its lifetime limit Replacement is recommended. according to the value set in Maintenance Demanded Limit. Page 98 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 103 S:35 * Factory calibration for the device has Repair required: contact your local been lost. Siemens representative. S:36 * Unable to start microwave module. Reset power. If error persists, contact your local Siemens representative. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 99...
  • Page 104 S:53 * Configuration lost: one or more Restore user parameters using parameter settings have been lost. This SIMATIC PDM. may occur after a firmware upgrade causes user parameters to be reset. Page 100 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 105: Operation Troubleshooting

    • use foam deflector or stilling symbol shows • physical damage well • excessive foam • relocate • multiple echoes • use a defoamer 2.2.4. 1 .1. Algorithm • set to F (First echo) 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 101...
  • Page 106 • relocate instrument to side pipe • increase confidence threshold 2.2.4. 1 .3. Echo Threshold • re-locate SITRANS LR250 material filling • increase measurement 2.2.7.1. Response Rate Reading setting response if possible response slow incorrect Page 102 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 107 2.2.4. 1 . 1 . Algorithm • multiple echoes processed • ensure is set to F (First echo) Rod Extension • nozzle too narrow for length • see Requirements on page 114. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 103...

  • Page 108: Appendix D: Maintenance

    Appendix D: Maintenance SITRANS LR250 requires no maintenance or cleaning under normal operating conditions. Under severe operating conditions, the horn antenna may require periodic cleaning. If cleaning becomes necessary: • Note the antenna material and the process medium, and select a cleaning solution that will not react adversely with either.

  • Page 109: Appendix E: Technical Reference

    Electromagnetic waves are not attenuated by dust. SITRANS LR250 consists of an enclosed electronic circuit coupled to an antenna and process connection. The electronic component generates a radar signal (26 GHz) that is directed to the horn.

  • Page 110: Measurement Response

    When the echoes are received, the relevant echo algorithm (2.2.4. 1 .1) is applied to determine the true material echo. Typical Receiver Signal End of Empty Transmit Level 2.2.1.11 Near Range Range Extension Difference between High Calibration Point and Low (2.2.1.12) as % Calibration Point Page 106 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 111: Echo Lock

    2.4.2. Failsafe Material Level Fail-safe Material Level Use Maximum mA Limit as material level Use Minimum mA Limit as material level HOLD Level remains at last reading VALUE User-selected value 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 107...

  • Page 112: Far Range (Range Extension)

    Near Range (Blanking) 2.2.1.12. Near Range programs SITRANS LR250 to ignore the zone in front of the antenna. The default blanking distance is 0.50 mm from end of horn antenna.. 2.2.5.6. Near Range allows you to increase the blanking value from its factory setting. But...
  • Page 113 Display before Auto False Echo Suppression Default Window Hover Level Echo Marker Example after Auto False Echo Suppression learned TVT curve liquid level false echo false echo 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 109...

  • Page 114: Ma Output

    20 mA Point When SITRANS LR250 is put into PROGRAM mode it stops responding to the process. It stores the most recent measurement, and holds the associated readings and mA signal output. The instrument reverts to the parameter last addressed during the previous program session.

  • Page 115: Maximum Process Temperature Chart

    Where the chart does not apply, please use your own judgement regarding the use of SITRANS LR250. Parameter 3. 1 4. 1 is required to monitor the Internal Temperature. It gives you an excellent indication of how reliably the product will perform thermally when installed on your process vessel.

  • Page 116: Process Pressure/Temperature Derating Curves

    The process pressure boundary assembly comprises the components that act as a barrier against pressure loss from the process vessel: that is, the combination of process connection body and emitter, but normally excluding the electrical enclosure. Page 112 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 117: Horn Antenna Or Wave Guide - Ansi Hole Pattern, 150

    Customer to provide adequate bolting and flat-faced gasket to retain vessel pressure and pro- vide sufficient sealing. Customer to provide adequate bolting and flat-faced gasket to retain vessel pressure and pro- vide sufficient sealing. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 113...

  • Page 118: Appendix F: Loop Power

    LR250 loop current IL Allowable operating area of SITRANS LR250 Curve 1 (General Purpose, Intrinsically Safe, Non-incendive) Loop Voltage versus Loop Resistance Power Supply Requirements 1000 (30.0v,845 ohms) RL=44.6*VL - 493.4 (17.8v, 300 ohms)

  • Page 119: Curve 2 (Flameproof, Increased Safety, Explosion-Proof)

    Curve 2 (Flameproof, Increased Safety, Explosion-proof) Loop Voltage versus Loop Resistance Startup Curve 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 115...

  • Page 120: Appendix G: Special Applications

    Appendix G: Special Applications This more complex SITRANS LR250 application example can be used for setup references. Application Example: Stillpipe This is used for products with an ε of less than 3, or if extremely turbulent or vortex conditions exist. This mounting arrangement can also be used to provide optimum signal conditions on foaming materials.

  • Page 121: Appendix H: Hart Communications

    Description for the instrument in question. HART DDs are controlled by the HART Communication Foundation. Please check with the HART Communication Foundation for the availability of the HART DD for SITRANS LR250. Older versions of the library will have to be updated in order to use all the features of SITRANS LR250.

  • Page 122: Hart Communicator 375

    HART Communicator 375 Notes: • HART Communicator 375 is supported by SITRANS LR250 HART Rev. 3.03. The menu structure is aligned with the menu structure of SIMATIC PDM. Chart 1 On Line Device Setup Quick Setup 1. PV 1. Master Reset 2.
  • Page 123 54. Bk Vol27Val 55. Bk Lev28Val 56. Bk Vol28Val 57. Bk Lev29Val 58. Bk Vol29Val 59. Bk Lev30Val 60. Bk Vol30Val 61. Bk Lev31Val 62. Bk Vol31Val 63. Bk Lev32Val 64. Bk Vol32Val 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 119...
  • Page 124 6. Low Setpoint 7. High Setpoint Local Display 1. Write Protect 2. Lock 3. Write Protect 4. Unlock Value HART Output 1. Poll Addr 2. Num Req Preams 3. Num Resp Preams Page 120 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 125: Supported Hart Commands

    Universal and Common Practice Commands For details on the Universal and Common Practice Commands, please contact the HART Communication Foundation. Device Specific Commands For a document containing the Device Specific Commands, please contact Siemens Milltronics at techpubs.smpi@siemens.com. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL...

  • Page 126: Appendix L: Software Revision History

    Appendix L: Software Revision History Soft- ware Date Changes Rev. Rev. • Initial release Page 122 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 127: Glossary

    (decibel): a unit used to measure the amplitude of signals. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 123...
  • Page 128 1 GHz to 300 GHz. 1. Many conductive liquids/electrolytes exhibit dielectric properties; the relative dielec- tric constant of water is 80. Page 124 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 129 Light speed is a constant 299, 792, 458 meters per second. stillpipe: a pipe that is mounted inside a vessel parallel to the vessel wall, and is open to the vessel at the bottom. 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 125...
  • Page 130 TVT (time varying threshold): a time-varying curve that determines the threshold level above which echoes are determined to be valid. waveguide antenna: a hollow, metallic tube that transmits a microwave signal to the product target. Page 126 SITRANS LR250 (HART) – INSTRUCTION MANUAL 7ML19985JE01...

  • Page 131: Index

    Measurement Response enclosure explanation 106 opening 24 mounting (standard) rotating 15 horn antennas 14 shielded rod 14 factory reset via PDM 55 Near Range (blanking) 108 failsafe timer 111 Fail-safe Timers 107 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 127...
  • Page 132 Rev. 6.0, SP2 features 52 SITRANS LR 200 overview 4 SITRANS LR250 operating principles 105 stillpipe weld requirements 16 Support contact information 2 temperature de-Rating charts 112 temperature specification Ambient/Operating 12 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 128...
  • Page 133 7ML19985JE01 SITRANS LR250 (HART) – INSTRUCTION MANUAL Page 129...

  • Page 134: Lcd Menu Structure

    2.2.3.6 TABLE 17 – 24 2.2.3.7 TABLE 25 – 32 2.2.4 ECHO PROC. 2.2.4.1 ECHO SELECT 2.2.4.1.1 ALGORITHM 2.2.4.1.2 POSITION 2.2.4.1.3 ECHO THRESHOLD 2.2.4.2 SAMPLING 2.2.4.2.1 ECHO LOCK 2.2.4.2.4 SAMPLING UP 2.2.4.2.5 SAMPLING DOWN 2.2.4.2.6 WINDOW Page 130 SITRANS LR250 – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 135 2.4.2 FAILSAFE MAT. LEVEL 2.4.4 FAILSAFE LEVEL DIAGNOSTICS 3. 1 ECHO PROFILE 3. 1 4 MEAS. VALUES 3.14. 1 CURR. INTERN. TEMP . 3.14.2 MAX. INTERN. TEMP . 3. 1 4.3 MIN. INTERN TEMP . 7ML19985JE01 SITRANS LR250– INSTRUCTION MANUAL Page 131...
  • Page 136 4. 1 8.1 TIME LAST CAL. 4.18.2 MAINT REQ LIMIT 4.18.3 MAINT DEM LIMIT 4.18.4 ALERT ACTIVATION 4.18.5 TOTAL CALIB.INTRV 4.18.6 MAINT STAT 4. 1 8.7 ACK STATUS 4. 1 8.8 ACK Page 132 SITRANS LR250 – INSTRUCTION MANUAL 7ML19985JE01...
  • Page 137 COMMUNICATION 5. 1 DEVICE ADDRESS 5.2 COMM. CONTROL SECURITY LOCK 6.2 UNLOCK VALUE LANGUAGE 7ML19985JE01 SITRANS LR250– INSTRUCTION MANUAL Page 133...

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