8 Parameter reference Note • Parameter names and menu structure are almost identical for SIMATIC PDM and the local user interface (LUI). • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • Mode toggles between PROGRAM and Measurement Modes. • For Quick Access to parameters via the handheld programmer, press Home , then enter the menu number, for example: 2.2.1. • In Navigation mode, ARROW keys ( ) navigate the menu in the direction of the arrow.
Parameter reference Quick Start (1.) Wizards provide step-by-step procedures to configure the device, filter out false echoes, and upload and download parameters and firmware to the optional display for easy configuration of multiple devices. Quick Start Wizard (1.1.) From measurement screen, press RIGHT arrow twice to open the Quick Start Wizard menu. Select a wizard, press RIGHT arrow to open the first step, and follow the instructions.
Parameter reference Order Option (2.1.4.) Read only. Displays the device type: standard or NAMUR NE 43-compliant. Menu Timeout (2.1.5.) Time menu stays visible before switching back to Measurement view if no key is pressed. Sensor (2.2.) Units (2.2.1.) PV (Primary Value) and SV (Secondary Sensor measurement units). Used in setting High/Low Calibration Point, and displayed on LCD and in PDM.
Parameter reference Sensor Mode (2.2.2.) ① Sensor value ⑤ ② ③ ④ Space ⑥ ⑦ ⑧ Distance High Calibration Point Sensor reference point [see Dimension drawings] (Page 191) Low Calibration Point Far range Level Mode Description NO SERVICE Measurement and associated loop current are n/a not updated, and the device defaults to Failsafe mode a).
Parameter reference Material (2.2.3.) Automatically configures the device to operate in the chosen application type, by changing one or more of the following parameters: Propagation Factor (2.8.3.), Position Detect (2.8.4.2.), and/or CLEF Range (2.8.4.4.). Options * LIQUID LIQUID LOW DK a) (low dielectric liquid - CLEF algorithm enabled) Related parameters Propagation Factor (2.8.3.) Position Detect (2.8.4.2.) CLEF Range (2.8.4.4.) a) dK < 3.
Parameter reference High Calibration Pt. (2.3.2.) Distance from sensor reference point 1) to High Calibration Point. Units are defined in Units (2.2.1.). Values Range: 0 to 20 m. Default 0.00 m Related parameters Units (2.2.1.) Near Range (2.8.1.) When setting the High Calibration Point value, note that echoes are ignored within Near Range (2.8.1.). The value produced by the echo processing which represents the distance from sensor reference point to the target.
Parameter reference Rate (2.4.) Response Rate (2.4.1.) Note Changing Response Rate resets Fill Rate per Minute (2.4.2.), Empty Rate per Minute (2.4.3.), and Damping Filter (2.2.4.). Sets the reaction speed of the device to measurement changes. Response Rate (2.4.1.) Fill Rate per Minute (2.4.2.) Empty Rate per Minute (2.4.3.) Damping Filter (2.2.4.) * Slow 0.1 m/min (0.32 ft/min) 10 s Medium 1.0 m/min (3.28 ft/min) 10 s Fast 10.0 m/min (32.
Parameter reference Empty Rate per Minute (2.4.3.) Defines the maximum rate at which the reported sensor value is allowed to increase. Adjusts the SITRANS LR250 response to increases in the actual material level. Empty Rate is automatically updated whenever Response Rate is altered. Options Range: 0 to 99999 m / min. Response Rate (2.4.1.) Empty Rate per Minute (2.4.3.) * Slow 0.1 m/min (0.32 ft/min) Medium 1.0 m/min (3.28 ft/min) Fast 10.0 m/min (32.8 ft/min) Altered by: Response Rate (2.4.1.
Parameter reference Material Level (2.5.1.) Note The default setting depends whether your device is a standard or NAMUR NE 43-compliant device. Defines the mA output to use when the Fail-safe timer expires. STANDARD DEVICE Options * HI 20.5 mA (max. mA Limit) LO 3.8 mA (min. mA Limit) HOLD Last valid reading (default 22.6 mA) VALUE User-selected value [defined in Fail-Safe mA Value (2.5.3.)] NAMUR NE 43-COMPLIANT DEVICE1) Options * 1) HI 20.5 mA (max. mA Limit) LO 3.8 mA (min.
Parameter reference Fail-Safe mA Value (2.5.3.) Note • The default settings are dependent on standard or NAMUR NE 43-compliant device. • Material Level (2.5.1.) must be set to VALUE to enable the Fail-Safe mA Value to be reported. Allows the user to define the mA value to be reported when the Fail-safe timer expires. Device Type Values STANDARD Range 3.56 mA to 22.6 mA Default 22.60 mA NAMUR NE43- COMPLIANT 3.58 mA Analog Output Scaling (2.6.) Current Output Function (2.6.1.
Parameter reference ① ② ③ ④ Sensor reference point High calibration point 20 mA 100% Space ⑤ ⑥ ⑦ ⑧ 4 mA 0% Distance Level Low calibration point Options Reference point Description * Level Low Calibration Point Space High Calibration Point measured as a percentage of the difference between High Calibration Point and Low Calibration Point Distance Sensor reference point Volume converts a level measurement to a volume output Manual a) allows mA Output Value (2.6.6.
Parameter reference 4 mA Setpoint (2.6.2.) Sets the process level corresponding to the 4 mA value. 4 mA always defaults to 0, and Current Output Function (2.6.1.) determines whether this is a Level, Space, Distance, or Volume measurement. (See Current Output Function (2.6.1.) for an illustration.) Values Range: –999999 to +999999 (limits vary with current function and units) Default: 0.00 m (set to value corresponding to 0% as defined by Current Output Function) Related Parameters Units (2.2.1.
Parameter reference Maximum mA limit (2.6.5.) Prevents the mA output from rising above this maximum level for a measurement value. This does not restrict the Fail-safe or Manual settings. Values Range: 3.8 to 20.50 (mA) Default: 20.50 (mA) mA Output Value (2.6.6.) Allows you to use a simulated value to test the functioning of the loop. You can enter 4 mA, 20 mA, or any other user-defined value within the range. Values Range: 3.56 mA to 22.6 mA Read Only unless Current Output Function (2.6.1.
Parameter reference Vessel Shape (2.7.1.1.) Defines the vessel shape and allows the LR250 to calculate volume instead of level. If None is selected, no volume conversion is performed. Select the vessel shape matching the monitored vessel or reservoir.
Parameter reference Vessel Shape a) LCD DISPLAY/ Description Also required HALF SPHERE BOT/ Half-sphere bottom Maximum volume, dimension A FLAT SLOPED BOT/ Flat sloped bottom Maximum volume, dimension A PARABOLIC ENDS/ Parabolic end horizontal cylinder Maximum volume, dimension A, dimension L LINEAR TABLE a) / Linearization table (level/volume breakpoints) Maximum volume, tables 1-32 level and volume breakpoints Linearization Table must be selected in order for level/volume values [see Table 1-8
Parameter reference Maximum Volume (2.7.1.2.) The maximum volume of the vessel. Enter the vessel volume corresponding to High Calibration Point. For example, if your maximum vessel volume is 8000 L, enter a value of 8000. Volume units are defined by the user but are not explicitly stated or shown in the SITRANS LR250. Values Range: 0.0 to 99999 m Default: 100.0 Related Parameters Low Calibration Pt. (2.3.1.) High Calibration Pt. (2.3.2.) Vessel Shape (2.7.1.1.) Vessel Dimension A (2.7.1.3.
Parameter reference Table 1-8 (2.7.2.) Note Linearization Table must be selected in Vessel Shape (2.7.1.1.) in order for level/volume values to be transferred. If your vessel shape is more complex than any of the preconfigured shapes, you can define the shape as a series of segments. A value is assigned to each level breakpoint and a corresponding value is assigned to each volume breakpoint. Level values are defined in Units (2.2.1.).
Parameter reference Volume 1 (2.7.2.2.) 1. Press RIGHT arrow to open Edit mode. 2. Enter volume value and press RIGHT arrow to accept it. 3. Press DOWN arrow to move to next level breakpoint. Example (values are for example purposes only) Breakpoint Number Level value (m) Volume value (l) 1 0 0 2 5 500 3 9 3000 4 19.5 8000 Table 9-16 (2.7.3.) Table 17-24 (2.7.4.) Table 25-32 (2.7.5.
Parameter reference Signal Processing (2.8.) Note Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. Near Range (2.8.1.) The range in front of the device (measured from the sensor reference point) within which any echoes will be ignored. This is sometimes referred to as blanking or a dead zone. The factory setting is 50 mm (2") past the end of the antenna, and the default is dependent on the antenna type and process connection.
Parameter reference Propogation Factor (2.8.3.) Note • When operating in a stillpipe, values for CLEF Range (2.8.4.4.), and for the propagation factor, should be set according to the pipe size. See the table below. • For reliable results the antenna size must be close to the pipe size. Compensates for the change in microwave velocity due to propagation within a metal stillpipe instead of in free space. Values Range 0.3 to 1.0 depending on pipe size Default 1.0000 40 mm (1.
Parameter reference Echo Select (2.8.4.) Algorithm (2.8.4.1.) Selects the algorithm to be applied to the echo profile to extract the true echo. Options * tF True First echo L Largest echo BLF Best of Largest and First echo Position Detect (2.8.4.2.) Defines where on the echo the distance measurement is determined. Options Center * Hybrid (Center and CLEF) CLEF (Constrained Leading Edge Fit) Related parameters CLEF Range (2.8.4.4.
Parameter reference CLEF Range (2.8.4.4.) Note CLEF Range is referenced from Far range. The CLEF algorithm is used mainly to allow correct level reporting for low dK materials which may otherwise cause an incorrect reading in an empty or almost empty vessel. It is used from Low Calibration Point (process empty level ) up to the level defined by CLEF Range (see illustration below). Above that point the Center algorithm is used. For more detail see CLEF Range (Page 220). Values Range: 0 to 20 m (0 to 65.
Parameter reference Echo Lock (2.8.5.1.) Note Ensure the agitator is always running while SITRANS LR250 is monitoring the vessel, to avoid stationary blade detection. Selects the measurement verification process. Options Lock Off Maximum Verification (not recommended for radar) * Material Agitator Total Lock (not recommended for radar) Related parameters Fill Rate per Minute (2.4.2.) Empty rate per Minute (2.4.3.) Sampling Up (2.8.5.2.) Sampling Down (2.8.5.3.
Parameter reference Confidence (2.8.6.1.) Indicates echo reliability: higher values represent better echo quality. The display shows the echo confidence of the last measurement. Echo Threshold (2.8.4.3.) defines the minimum criterion for echo confidence. Values (view only) 0 to 99 Related Parameters Echo Threshold (2.8.4.3.) ---- Shot not used Open the menu Device – Echo Profile Utilities and click on the tab Echo Profile. Echo Strength (2.8.6.2.
Parameter reference Auto False Echo Suppression (2.8.7.1.) Used together with Auto False Echo Suppression Range (2.8.7.2.) to screen out false echoes in a vessel with known obstructions. A ’learned TVT’ (time varying threshold) replaces the default TVT over a specified range. See Auto False Echo Suppression (Page 221) for a more detailed explanation. Note • Make sure material level is below all known obstructions when Auto False Echo Suppression is used to learn the echo profile.
Parameter reference 1. Determine Auto False Echo Suppression Range. Measure the actual distance from the sensor reference point to the material surface using a rope or tape measure. 2. Subtract 0.5 m (20") from this distance, and use the resulting value. 3. Go to Auto False Echo Suppression Range (2.8.7.2.) and enter the value calculated in step 2. 4. Go to Auto False Echo Suppression (2.8.7.1.) and press RIGHT arrow to open Edit Mode. 5. Select Learn.
Parameter reference To set Auto False Echo Suppression via the handheld programmer: Options * a) OFF Default TVT will be used. ON ’Learned’ TVT will be used. LEARN ’Learn’ the TVTa). The learned TVT takes effect only at the next measurement. Auto False Echo Suppression Range (2.8.7.2.) Note Changes take effect only at the next measurement. "Master reset" does not clear the learned/stored TVT, select "Off" to turn it off or "learn" for a new TVT. See Master Reset (4.1.
Parameter reference Hover Level (2.8.7.3.) Note Changes take effect only at the next measurement. Defines how high the TVT (Time Varying Threshold) is placed above the noise floor of the echo profile, as a percentage of the difference between the peak of the largest echo in the profile and the noise floor. See Auto False Echo Suppression (2.8.7.1.) for an illustration.
Parameter reference TVT shaper (2.8.8.) Note • The range is –100 to 100 bits. With 2 bits per dB this gives a range of –50 to 50 dB. • Shaper Mode (2.8.7.4.) must be turned ON in order for TVT shaper points to be transferred. Adjusts the TVT (Time Varying Threshold) at a specified range (breakpoint on the TVT). This allows you to reshape the TVT to avoid unwanted echoes. There are 40 breakpoints arranged in 5 groups. (We recommend using SIMATIC PDM to access this feature.
Parameter reference Breakpoint 28-36 (2.8.8.4.) Values Range: –50 to 50 dB Default: 0 dB Breakpoint 37-40 (2.8.8.5.) Values Range: –50 to 50 dB Default: 0 dB Measured Values (2.8.9.) Read only. Allows you to view measured values for diagnostic purposes. To access measured values via SIMATIC PDM: Open the menu View – Process Variables. Level Measurement (2.8.9.1.) The value for level. Space Measurement (2.8.9.2.) The value for space. Distance Measurement (2.8.9.3.) The value for distance.
Parameter reference Echo Profile (3.1.) Allows you to request the current echo profile either locally via the handheld programmer, or remotely via SIMATIC PDM, or AMS Device Manager. [For more detail see Echo Processing (Page 216)]. To request a profile via SIMATIC PDM: Open the menu Device – Echo Profile Utilities. [For more detail see Echo Profile Utilities via SIMATIC PDM (Page 72)]. To request a profile via the handheld programmer: 1. In PROGRAM mode, navigate to Level Meter > Diagnostics (3.
Parameter reference Service (4.) Note Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. Master Reset (4.1.) Note Following a reset to Factory Defaults, complete reprogramming is required. Resets all parameter to factory defaults, with the following exceptions: ● Device Address (5.1.) remains unchanged if the reset command is sent remotely (via AMS, PDM, DTM, FC375) but is reset to 0 if the reset command is sent via LUI. ● Write Protect (6.2.1.
Parameter reference Remaining Device Lifetime (4.2.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up Maintenance/Service schedules, based on operating hours instead of a calendar-based schedule. See also Remaining Sensor Lifetime (4.3.), Service Schedule (4.4.), and Calibration Schedule (4.5.).
Parameter reference Lifetime (Expected) (4.2.1.) Note The device always operates in years. Changing the units affects only the parameter view of the Service Interval parameters in SIMATIC PDM. User-configurable recommended time between product inspections. Values Units a): hours, days, years Range: 0 to 20 years Default: 10 years a) Units are selectable only via SIMATIC PDM. Time in Operation (4.2.2.) Read only. The amount of time the device has been operating. Remaining Lifetime (4.2.3.) Read only.
Parameter reference Activation of Reminders (4.2.4.) Note To modify this parameter via SIMATIC PDM it must be accessed via the pull-down menu Device – Maintenance. Allows you to enable a maintenance reminder. Values * Timer OFF ON - no reminders checked ON - Reminder 1 (Maintenance Required) checked ON - Reminders 1 and 2 checked ON - Reminder 2 (Maintenance Demanded) checked 1. First set the values in Reminder 1 before Lifetime (Required) (4.2.5.)/ Reminder 2 before Lifetime (Demanded) (4.2.6.). 2.
Parameter reference Maintenance Status (4.2.7.) Indicates which level of maintenance reminder is active. In SIMATIC PDM, open the menu View – Device Status, click on the Maintenance tab, and check the Device Lifetime Status window. Acknowledge Status (4.2.8.) Indicates which level of maintenance reminder has been acknowledged. In SIMATIC PDM, open the menu View – Device Status, click on the Maintenance tab, and check the Device Lifetime Status window. Acknowledge (4.2.9.
Parameter reference Remaining Sensor Lifetime (4.3.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up Maintenance/Service schedules, based on operating hours instead of a calendar-based schedule. See also Remaining Device Lifetime (4.2.), Service Schedule (4.4.), and Calibration Schedule (4.5.).
Parameter reference Lifetime (Expected) (4.3.1.) Note The device always operates in years. Changing the units affects only the parameter view of Remaining Sensor Life parameters in SIMATIC PDM. Allows you to override the factory default. Values Units a): hours, days, years Range: 0 to 20 years Default: 10.00 years a) Units are selectable only via SIMATIC PDM.
Parameter reference Time in Operation (4.3.2.) The amount of time the sensor has been operating. Can be reset to zero after performing a service or replacing the sensor. To reset to zero: ● In SIMATIC PDM, open the menu Device – Maintenance, click on the Remaining Sensor Lifetime tab, and click on Sensor Replaced to restart the timer and clear any fault messages. ● Via the handheld programmer, manually reset Time in Operation (4.3.2.) to zero. Remaining Lifetime (4.3.3.) Read only. Lifetime (Expected) (4.
Parameter reference Reminder 2 before Lifetime (Demanded) (4.3.6.) If Remaining Lifetime (4.3.3.) is equal to or less than this value, the device generates a Maintenance Demanded reminder. Values Range: 0 to Lifetime (Expected) (4.3.1.) Default: 0.019 years 1. Modify values as required. 2. Set Activation of Reminders (4.3.4.) to the desired option. Maintenance Status (4.3.7.) Indicates which level of maintenance reminder is active.
Parameter reference Service Schedule (4.4.) Note • Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up Maintenance/Service schedules, based on operating hours instead of a calendar-based schedule. See also Remaining Device Lifetime (4.2.), Remaining Sensor Lifetime (4.3.), and Calibration Schedule (4.5.). • Performing a reset to Factory Defaults will reset all the Maintenance Schedule parameters to their factory defaults. • The device operates in years.
Parameter reference Service Interval (4.4.1.) Note The device always operates in years. Changing the units affects only the parameter view of the Service Interval parameters in SIMATIC PDM. User-configurable recommended time between product inspections. Values Units a): hours, days, years Range: 0 to 20 years Default: 1.0 year a) Units are selectable only via SIMATIC PDM. Time Since Last Service (4.4.2.) Time elapsed since last service. Can be reset to zero after performing a service.
Parameter reference Time Until Next Service (4.4.3.) Read only. Service Interval (4.4.1.) less Time Since Last Service (4.4.2.). Activation of Reminders (4.4.4.) Note To modify this parameter via SIMATIC PDM it must be accessed via the pull-down menu Device – Maintenance. Allows you to enable a maintenance reminder. Options * Timer OFF ON - no reminders checked ON - Reminder 1 (Maintenance Required) checked ON - Reminders 1 and 2 checked ON - Reminder 2 (Maintenance Demanded) checked 1.
Parameter reference Reminder 2 before Service (Demanded) (4.4.6.) If Time Until Next Service (4.4.3.) is equal to or less than this value, the device generates a Maintenance Required reminder. Values Range: 0 to Service Interval (4.4.1.) Default: 0.019 years 1. Modify values as required 2. Set Activation of Reminders (4.4.4.) to the desired option. Maintenance Status (4.4.7.) Indicates which level of maintenance reminder is active.
Parameter reference Calibration Schedule (4.5.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • Four sets of parameters allow you to monitor the Device/Sensor Lifetimes and set up Maintenance/Service schedules, based on operating hours instead of a calendar-based schedule. See also Remaining Device Lifetime (4.2.), Remaining Sensor Lifetime (4.3.), and Service Schedule (4.4.).
Parameter reference Calibration Interval (4.5.1.) Note The device always operates in years. Changing the units affects only the parameter view of Remaining Sensor Life parameters in SIMATIC PDM. User-configurable recommended time between product calibrations. Values Units a): hours, days, years Range: 0 to 20 years Default: 1.0 year a) Units are selectable only via SIMATIC PDM. Time Since Last Calibration (4.5.2.) Time elapsed since last calibration.
Parameter reference Time Until Next Calibration (4.5.3.) Read only. Calibration Interval (4.5.1.) less Time Since Last Calibration (4.5.2.). Activation of Reminders (4.5.4.) Note To modify this parameter via SIMATIC PDM it must be accessed via the pull-down menu Device – Maintenance. Allows you to enable a maintenance reminder. Options Timer OFF ON - no reminders checked ON - Reminder 1 (Maintenance Required) checked * ON - Reminders 1 and 2 checked ON—Reminder 2 (Maintenance Demanded) checked 1.
Parameter reference Reminder 2 before Calibration (Demanded) (4.5.6.) If Time Until Next Calibration (4.5.3.) is equal to or less than this value, the device generates a Maintenance Demanded reminder. Values Range: 0 to Calibration Interval (4.5.1.) Default: 0.164 years 1. Modify values as required. 2. Set Activation of Reminders (4.5.4.) to the desired option. Maintenance Status (4.5.7.) Indicates which level of maintenance reminder is active.
Parameter reference Powered Hours (4.7.) Read only. Displays the number of hours the unit has been powered up since manufacture. In SIMATIC PDM, open the menu Device – Wear. Power-on Resets (4.8.) Read only. The number of power cycles that have occurred since manufacture. In SIMATIC PDM, open the menu Device – Wear. LCD Fast Mode (4.9.) Note • LCD Fast Mode takes effect only after 30 minutes of inactivity. (Each time the device is powered up, a further 30 minutes of inactivity is required.
Parameter reference Memory Test (4.12.) Allows verification of the RAM, EEPROM, and Flash memory of the SITRANS LR250. LCD Display IDLE No test in progress. BUSY Test in progress. PASS Memory test successful. FAIL Test failed. Err1 Test returned unexpected results. P Oxcafe Test passed with result data. F Oxcafe Test failed with result data. Handheld programmer entry Any numeric key from 1 to 9 activates test.
Parameter reference Security (6.) Note Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. Remote Access (6.1.) Access Control (6.1.1.) Note If access control is changed to limit remote access, it can only be reset via the handheld programmer. Enables/disables the read/write access to parameters via remote communications. Options * Read only No changes are permitted via remote communications. Read Write Changes are permitted.
Parameter reference Write Protect (6.2.1.) Note This lock affects only the handheld programmer. A remote master can change configuration if Access Control (6.1.1.) is set to allow this. Prevents any changes to parameters via the handheld programmer. Options Range: 0 to 9999 * Unlock value [stored in PIN to Unlock (6.2.2.)] Lock Off Any other value Lock On ● To turn Lock On, key in any value other than the Unlock Value stored in PIN to Unlock (6.2.2.).
Parameter reference 8.1 Alphabetical parameter list 8.1 Alphabetical parameter list Note For a detailed list of parameters see Parameter Reference (Page 113). Maintenance Parameters are not listed below. See Remaining Device Lifetime (4.2.), Remaining Sensor Lifetime (4.3.), Service Schedule (4.4.) and Calibration Schedule (4.5.) for those parameters. 20 mA Setpoint (2.6.3.) 4 mA Setpoint (2.6.2.) Access Control (6.1.1.) Algorithm (2.8.4.1.) Analog Output Scaling (2.6.) Auto False Echo Suppression (2.8.7.
Parameter reference 8.1 Alphabetical parameter list Echo Select (2.8.4.) Echo Strength (2.8.6.2.) Echo Threshold (2.8.4.3.) Electronics Temperature (3.2.) Empty Rate per Minute (2.4.3.) Fail-safe (2.5.) Fail-Safe mA Value (2.5.3.) Far Range (2.8.2.) Fill Rate per Minute (2.4.2.) Firmware Revision (2.1.2.) Hardware Revision (2.1.1.) High Calibration Pt. (2.3.2.) Highest value (3.2.2.) Hover Level (2.8.7.3.) Language (7.) LCD Contrast (4.10.) LCD Fast Mode (4.9.) Level 1 (2.7.2.1.) Level Measurement (2.8.9.1.
Parameter reference 8.1 Alphabetical parameter list Measured Values (2.8.9.) Memory Test (4.12.) Menu Timeout (2.1.5.) Minimum mA limit (2.6.4.) Near Range (2.8.1.) Noise Average (2.8.6.3.) Order Option (2.1.4.) PIN to Unlock (6.2.2.) Position Detect (2.8.4.2.) Power-on Resets (4.8.) Powered Hours (4.7.) Propagation Factor (2.8.3.) Quick Start (1.) Quick Start Wizard (1.1.) Rate (2.4.) Remote Access (6.1.) Response Rate (2.4.1.) Sampling (2.8.5.) Sampling Down (2.8.5.3.) Sampling Up (2.8.5.2.
Parameter reference 8.1 Alphabetical parameter list Table 17-24 (2.7.4.) Table 25-32 (2.7.5.) TVT Setup (2.8.7.) TVT Shaper (2.8.8.) Units (2.2.1.) Vessel Dimension A (2.7.1.3.) Vessel Dimension L (2.7.1.4.) Vessel Shape (2.7.1.1.) Volume (2.7.1.) Volume 1 (2.7.2.2.) Volume Measurement (2.8.9.4.) Write Protect (6.2.1.
Service and maintenance 9 The radar device requires no maintenance or cleaning under normal operating conditions, although periodic inspection and retightening of the attachment hardware may be required as the gasket material will relax over time (dependant upon process conditions). Under severe operating conditions, the antenna may require periodic cleaning.
Service and maintenance 9.2 Part replacement Replacing the lens 1. Remove existing lens by turning it counter-clockwise until it separates from the unit. 2. Replace the O-ring between the lens and process connection with a new one. 3. Carefully thread the replacement lens, and turn it clockwise until resistance is encountered. Do not over-tighten the lens, as this will permanently damage it. 4. For flange installation instructions, see Flange bolting, Flanged encapsulated antenna only (Page 22).
10 Diagnosing and troubleshooting 10.1 Communication troubleshooting 1. Check the following: – There is power at the device. – The LCD shows the relevant data. – The device can be programmed using the handheld programmer. – If any fault codes are being displayed see General Fault Codes (Page 174) for a detailed list. 2. Verify that the wiring connections are correct. 3. See the table below for specific symptoms. Symptom Corrective action The device cannot be programmed via the • handheld programmer.
Diagnosing and troubleshooting 10.2 Device status icons 10.
Diagnosing and troubleshooting 10.
Diagnosing and troubleshooting 10.3 General fault codes 10.3 General fault codes Note • If more than one fault is present, the device status indicator and text for each fault alternate at 2 second intervals. • Some faults cause the device to go to Fail-safe mode (Fault 52). These are indicated with an asterisk (*). Code/ Icon S: 0 S: 2 Meaning * * Corrective Action The device was unable to get a measurement • within the Fail-safe LOE Timer period.
Diagnosing and troubleshooting 10.3 General fault codes Code/ Icon Meaning Corrective Action S: 9 Service interval as defined in Maintenance Demanded Limit has expired. Perform service. S: 11 Internal temperature sensor failure. Repair required: contact your local Siemens representative. S: 12 Internal temperature of device has exceeded specifications: it is operating outside its temperature range. • Relocate device and/or lower process temperature enough to cool device.
Diagnosing and troubleshooting 10.3 General fault codes Code/ Icon Meaning Corrective Action S: 36 * Unable to start microwave module. Cycle power. If fault persists, contact your local Siemens representative. S: 37 * Measurement hardware problem. Cycle power. If fault persists, contact your local Siemens representative. S: 38 * Failure in the device electronics. Cycle power. If fault persists, contact your local Siemens representative: repair required.
Diagnosing and troubleshooting 10.3 General fault codes Code/ Icon Meaning Corrective Action S: 52 Fail-safe is activated. Possible causes: For 3: 1. hardware failure • Correct configuration; ensure installation is correct; 2. memory failure • 3. Fail-safe LOE timer expired– possible causes: faulty installation, antenna material buildup, foaming/other adverse process conditions, invalid calibration range.
Diagnosing and troubleshooting 10.4 Operation troubleshooting 10.4 Operation troubleshooting Operating symptoms, probable causes, and resolutions. Symptom Cause Action Display shows level or target is out of range • check specifications • check Low Calibration Pt. (2.3.1.) • increase Confidence (2.8.6.1.
Diagnosing and troubleshooting 10.4 Operation troubleshooting Symptom Cause Action Reading erratic echo confidence weak • refer to Confidence (2.8.6.1.) • use Auto False Echo Suppression (2.8.7.1.) and Auto False Echo Suppression Range (2.8.7.2.) • use foam deflector or stillpipe • decrease Fill Rate per Minute (2.4.2.) • relocate device to side pipe • increase confidence threshold in Echo Threshold (2.8.4.3.
Diagnosing and troubleshooting 10.
11 Technical data Note • Siemens Milltronics makes every attempt to ensure the accuracy of these specifications but reserves the right to change them at any time. 11.1 Power General Purpose Intrinsically Safe Non-Sparking Non-incendive (FM/CSA US/Canada only) Flameproof Increased Safety Explosion-proof (FM/CSA US/Canada only) Nominal 24 V DC at 550 Ohm Nominal 24 V DC at 250 Ohm ● Maximum 30 V DC ● 4 to 20 mA ● Max. startup current see Startup Behaviour (Page 238).
Technical data 11.2 Performance 11.2 Performance Reference operating conditions according to IEC 60770-1 Ambient temperature 15 to 25 °C (59 to 77 °F) Humidity 45 to 75% relative humidity Ambient pressure 860 to 1060 mbar a (86000 to 106000 N/m2 a) Measurement Accuracy (measured in accordance with IEC 60770-1) Maximum measured error = 3 mm (0.12")1) 2) 3) including hysteresis and nonrepeatability Frequency K-band Maximum measurement range4) 1.
Technical data 11.3 Interface 11.3 Interface Analog output Communication: HART1) Signal range 4 to 20 mA (± 0.02 mA accuracy) upper limit 20 to 23 mA adjustable Fail signal 3.6 mA to 23 mA [For more details, see Fail-safe Mode] (Page 227) Load 230 to 600 Ω, 230 to 500 Ω when connecting a coupling module Max. line length multi-wire: ≤ 1500 m (4921 ft) Configuration Protocol HART, Version 5.
Technical data 11.4 Mechanical 11.4 Mechanical Process connection: Threaded connection 1.5" NPT (ASME B1.20.1), R (BSPT, EN 10226-1) a) or G (BSPP, EN ISO 228-1) or 2" NPT (ASME B1.20.1), R (BSPT, EN 10226-1) or G (BSPP, EN ISO 228-1) or 3" NPT (ASME B1.20.1), R (BSPT, EN 10226-1) or G (BSPP, EN ISO 228-1) Flange connection (flat-face) 2", 3", 4" (ASME 150 lb, 300 lb) DN50, DN80, DN100 (PN 10/16, PN 25/40) 50A, 80A, 100A (JIS 10K) Materials 316L /1.4404 or 316L /1.
Technical data 11.4 Mechanical DN50 PN 10/16 or 2" 150 lb flat-face flange with 2" horn antenna approximately 8 kg (17.6 lb) DN100 PN 25/40 or 4" ASME 300 lb flatface flange with 4" horn antenna approximately 17.4 kg (38.3 lb) DN50 PN 10/16 raised-face flange with 2" horn antenna approximately 6 kg (13.2 lb) DN100 PN 25/40 raised-face flange with 4" horn antenna approximately 11.3 kg (24.9 lb) 2" ASME 150 lb flanged encapsulated antenna approximately 7.0 kg (15.
Technical data 11.5 Environmental 11.5 Environmental Note • For the specific configuration you are about to use or install, check transmitter nameplate and see Approvals (Page 187). • Use appropriate conduit seals to maintain IP or NEMA rating. Location indoor/ outdoor Altitude 5000 m (16,404 ft) max.
Technical data 11.7 Approvals 11.7 Approvals Note The device nameplate lists the approvals that apply to your device. Application type Non-hazardous Hazardous LR250 version Approval rating Valid for: General purpose CSAUS/C, FM, CE, C-TICK Radio Europe (R&TTE), FCC, Industry Canada Intrinsically safe (Page 28) ATEX II 1G, Ex ia IIC T4 Ga ATEX II 1D, Ex ia ta IIIC T100 °C Da Europe IECEx SIR 05.0031X, Ex ia IIC T4 Ga Ex ia ta IIIC T100 °C Da International FM/CSA Class I, Div.
Technical data 11.7 Approvals Application type LR250 version Increased safety (Page 32) Approval rating Valid for: INMETRO: DNV 12.0088 X Ex d ia mb IIC T4 Ga/Gb Ex ia ta IIIC T100 °C Da IP67 -40 °C ≤ Ta ≤ +80 °C Um = 250 V DNV #OCP 0017 ABNT NBR IEC 60079-0:2008, ABNT NBR IEC 60079-1:2009, ABNT NBR IEC 60079-11:2009, ABNT NBR IEC 60079-18:2010, ABNT NBR IEC 60079-26:2008, ABNT NBR IEC 60079-31:2011 Brazil ATEX II 1/2 GD, 1D, 2D IECEx SIR 08.
Technical data 11.8 Programmer (infrared keypad) 11.8 Programmer (infrared keypad) Note Battery is non-replaceable with a lifetime expectancy of 10 years in normal use. To estimate the lifetime expectancy, check the nameplate on the back for the serial number. The first six numbers show the production date (mmddyy), for example, serial number 032608101V was produced on March 26, 2008.
Technical data 11.
Dimension drawings 12.1 12 Threaded horn antenna Note • Process temperature and pressure capabilities are dependent upon information on the process connection tag. Reference drawing listed on the tag is available for download from our website under Support/Installation drawings/Level Measurement/Continuous Radar/LR250: Product page (http://www.siemens.com/LR250) • Process connection drawings are also available for download from the Installation Drawings page.
Dimension drawings 12.1 Threaded horn antenna ① ② ③ ④ ⑤ ⑥ ½" NPT cable entry, or M20 cable gland threaded cover 2" horn 3" horn 4" horn ⑦ ⑧ ⑨ ⑩ ⑪ enclosure/electronics retaining collar process connection tag horn sensor reference point horn O.D.
Dimension drawings 12.1 Threaded horn antenna Threaded horn dimensions Antenna Type Antenna O.D. in mm (inch) Height to sensor reference point, in mm (inch) a) 1-1/2" threaded connection 2" threaded connection 3" threaded connection 1.5" 39.8 (1.57) 135 (5.3) N/A N/A 19 10 (32.8) 2" 47.8 (1.88) N/A 166 (6.55) 180 (7.09) 15 20 (65.6) 3" 74.8 (2.94) N/A 199 (7.85) 213 (8.39) 10 20 (65.6) 4" 94.8 (3.73) N/A 254 (10) 268 (10.55) 8 20 (65.
Dimension drawings 12.2 Threaded horn antenna with extension 12.2 Threaded horn antenna with extension ① ② ③ ④ ⑤ ⑥ ½" NPT cable entry, or M20 cable gland threaded cover 2" horn 3" horn 4" horn ⑦ ⑧ ⑨ ⑩ ⑪ enclosure/electronics retaining collar process connection tag horn sensor reference point horn O.D.
Dimension drawings 12.2 Threaded horn antenna with extension Threaded horn with extension dimensions Antenna Type Antenna O.D. in mm (inch) Height to sensor reference point, in mm (inch) a) 1-1/2" threaded connection 2" threaded connection 3" threaded connection Beam Angle Measurement (°) b) range in m (ft) 1.5" 39.8 (1.57) 235 (9.25) N/A N/A 19 10 (32.8) 2" 47.8 (1.88) N/A 266 (10.47) 280 (11.02) 15 20 (65.6) 3" 74.8 (2.94) N/A 299 (11.77) 313 (12.32) 10 20 (65.6) 4" 94.8 (3.
Dimension drawings 12.3 Flanged horn antenna 12.3 Flanged horn antenna ① ② ③ ④ ⑤ ½" NPT cable entry, or M20 cable gland threaded cover horn horn O.D.
Dimension drawings 12.3 Flanged horn antenna Flanged Horn dimensions Nominal horn size in mm (inch) Horn O.D. in mm (inch) 50 (2) Height to sensor reference point, in mm (inch)a) Beam angle (°)b) Stainless steel flange: raised or flat-face Optional alloy flange c) 47.8 (1.88) 135.3 (5.32) 138.3 (5.44) 15 80 (3) 74.8 (2.94) 168.3 (6.62) 171.3 (6. 74) 10 100 (4) 94.8 (3.73) 223.3 (8.79) 226.3 (8.90) 8 Measurement range, in m (ft) 20 (65.
Dimension drawings 12.4 Flanged horn antenna with extension 12.4 Flanged horn antenna with extension ① ② ③ ④ ⑤ ½" NPT cable entry, or M20 cable gland threaded cover horn horn O.D.
Dimension drawings 12.4 Flanged horn antenna with extension Flanged horn with extension dimensions Nominal horn size in mm (inch) Horn O.D. in mm Height to sensor reference point,, in mm (inch) (inch) a) 50 (2) Beam angle (°)b) Stainless steel flange: raised or flat-face Optional alloy flange c) 47.8 (1.88) 235.3 (9.26) 238.3 (9.38) 15 80 (3) 74.8 (2.94) 268.3 (10.56) 271.3 (10.68) 10 100 (4) 94.8 (3.73) 323.3 (12.73) 326.3 (12.85) 8 Measurement range, in m (ft) 20 (65.
Dimension drawings 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only) 12.
Dimension drawings 12.5 Flanged encapsulated antenna (2"/DN50/50A sizes only) Flanged encapsulated antenna (2"/DN50/50A) dimensions 2"/DN50/50A 1) ③ mm (inch) ⑦ mm (inch) ⑧ mm (inch) ⑩ mm (inch)1) 263 (10.35) 223 (8.78) 274 (10.79) 11 (0.43) Height from tip of lens to sensor reference point as shown. Flange size Flange class Flange O.D. [mm (inch)] Antenna aperture size [mm (inch)] Beam angle (°)1) Measurement range [m (ft)] 50 (1.97) 12.8 10 (32.8)2) 2" 150 LB 152 (5.
Dimension drawings 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger) 12.
Dimension drawings 12.6 Flanged encapsulated antenna (3"/DN80/80A sizes and larger) Flanged encapsulated antenna (3"/DN80/80A and larger) dimensions ③ mm (inch) ⑦ mm (inch) ⑧ mm (inch) ⑩ mm (inch)1) 3"/DN80/80A 328 (12.91) 288 (11.34) 343 (13.50) 15 (0.59) 4"/DN100/100A 328 (12.91) 288 (11.34) 343 (13.50) 13 (0.51) 6"/DN150/150A 333 (13.11) 293 (11.54) 348 (13.70) 15 (0.59) 1) Height from tip of lens to sensor reference point as shown. See also Raised-Face Flange per EN 1092-1.
Dimension drawings 12.7 Threaded PVDF antenna 12.
Dimension drawings 12.8 Threaded connection markings Threaded PVDF antenna dimensions Nominal antenna size Antenna O.D. Height to sensor reference point a) Beam angle b) Measurement range 50 mm (2") 49.5 mm (1.94") 121 mm (4.76") 19 degrees 10 m (32.8 ft)c) a) Height from bottom of antenna to sensor reference point as shown: see dimension drawing. b) -3dB in the direction of the polarization axis. See Polarization reference point (Page 20) for an illustration. c) 12.
Dimension drawings 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna Stainless steel or optional alloy N06022/2.4602 (Hastelloy® C-22) ① ② ③ ④ ⑤ angle of adjacent bolt holes bolt hole diameter bolt hole circle diameter waveguide mounting hole Flange O.D.
Dimension drawings 12.9 Raised-Face flange per EN 1092-1 for flanged horn antenna Raised-Face flange dimensions Flange bolt hole pattern ⑤ ③ ② Flange O.D.
Dimension drawings 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna Stainless steel ① ② ③ ④ angle of adjacent bolt holes bolt hole diameter bolt hole circle diameter antenna ⑤ ⑥ ⑦ ⑧ flange O.D.
Dimension drawings 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna Raised-Face flange dimensions Pipe size Flange class ⑤ ③ ② Flange O.D. [mm (inch)] Bolt hole circle Ø [mm (inch)] 152 (5.98) 120.7 (4.75) 3" 190 (7.48) 152.4 (6.00) 4" 230 (9.06) 190.5 (7.50) 6" 280 (11.02) 241.3 (9.50) 22.2 (0.87) 155 (6.10) 125 (4.92) 18 (0.71) DN80 200 (7.87) 160 (6.30) DN100 220 (8.66) 180 (7.09) DN150 285 (11.22) 240 (9.45) 22 (0.87) 155 (6.10) 120 (4.72) 19 (0.
Dimension drawings 12.10 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna Raised-Face flange markings Blind Flange Markings (Optional Manufacturer’s Logo [optional]; Flange Standard; Nominal Size; Material; Heat Code) Manufacturer’s logo; EN 1092-1 05 ‘B1’; ‘DN50’ ‘PN16’ ‘1.4404 or 1.4435’ A1B2C3 Machining Identification Serial no. mmddyyx xx Logo Welded Assembly Identification Flange series Flange series Heat Code no.
Dimension drawings 12.11 Flat-Face flange 12.
Dimension drawings 12.11 Flat-Face flange Flat-Face flange dimensions Flange size a) Flange class Flange O.D. Bolt hole circle Ø Bolt hole Ø No. of bolt holes Thickness 2" ASME 150 lb 6.0" 4.75" 0.75" 4 0.88" 3" ASME 150 lb 7.5" 6.0" 0.75" 4 0.96" 4" ASME 150 lb 9.0" 7.50" 0.75" 8 1.25" 2" ASME 300 lb 6.50" 5.00" 0.75" 8 1.12" 3" ASME 300 lb 8.25" 6.62" 0.88" 8 1.38" 4" ASME 300 lb 10.00" 7.88" 0.88" 8 1.50" DN 50 EN PN 16 165 mm 125 mm 18 mm 4 24.
Dimension drawings 12.11 Flat-Face flange Flat-Face flange markings Flat Face Flange Identification Serial No. Logo MMDDYYXXX Welded Assembly Identification Flange series Series Nominal size 25556 2 150 DN80 PN16 Material Heat code Flange series Heat code no. 316L/ 1.4404 or 316L/ 1.4435 A1B2C3 25546 A1B2C3 Serial number: A unique number allotted to each flange, including the date of manufacture (MMDDYY) followed by a number from 001 to 999 (indicating the sequential unit produced).
Dimension drawings 12.12 Process connection tag (pressure rated versions) 12.12 Process connection tag (pressure rated versions) For pressure-rated versions only, the process connection label lists the following information: Process connection tag (pressure rated versions) Item Sample Text Comments/Explanation SERIAL # GYZ / 00000000 Pressure Boundary Assembly NOMINAL PIPE SIZE (DN) 4 INCH / 100mm Nominal Pipe Size INSTRUMENT MAWP (PS) 11.
Appendix A: Technical reference A Note Where a number follows the parameter name [for example, Master Reset (4.1.)] this is the parameter access number via the handheld programmer. See Parameter Reference (Page 113) for a complete list of parameters. A.1 Principles of operation SITRANS LR250 is a 2-wire 25 GHz pulse radar level transmitter for continuous monitoring of liquids and slurries. (The microwave output level is significantly less than that emitted from cellular phones.
Appendix A: Technical reference A.2 Echo Processing A.2 Echo Processing A.2.1 Process Intelligence The signal processing technology embedded in Siemens radar level devices is known as Process Intelligence. Process intelligence provides high measurement reliability regardless of the dynamically changing conditions within the vessel being monitored. The embedded Process Intelligence dynamically adjusts to the constantly changing material surfaces within these vessels.
Appendix A: Technical reference A.2 Echo Processing A.2.2 Echo Selection Time Varying Threshold (TVT) A Time Varying Threshold (TVT) hovers above the echo profile to screen out unwanted reflections (false echoes). In most cases the material echo is the only one which rises above the default TVT. In a vessel with obstructions, a false echo may occur. See Auto False Echo Suppression (Page 221) for more details.
Appendix A: Technical reference A.2 Echo Processing Algorithm (2.8.4.1.) The true echo is selected based on the setting for the Echo selection algorithm. Options are true First Echo, Largest Echo, or best of First and Largest. Position Detect (2.8.4.2.) The echo position detection algorithm determines which point on the echo will be used to calculate the precise time of flight, and calculates the range using the calibrated propagation velocity (see Propagation Factor (2.8.3.) for values).
Appendix A: Technical reference A.2 Echo Processing Example: CLEF off: Position set to Hybrid Vessel height: 1.5 m; CLEF range set to 0 (Center algorithm gives the same result.) ① ② ③ ④ default TVT material echo vessel bottom echo selected echo marker Example: CLEF enabled Vessel height: 1.5 m; CLEF range set to 0.
Appendix A: Technical reference A.2 Echo Processing A.2.3 CLEF Range CLEF Range (2.8.4.4.) is referenced from Low Calibration Point (process empty level ). When the Hybrid algorithm is selected in Position Detect (2.8.4.2.), the CLEF algorithm will be applied up to the limit of CLEF Range. Above this limit the Center algorithm will be applied. ① ② ③ ④ ⑤ A.2.
Appendix A: Technical reference A.2 Echo Processing A.2.6 Auto False Echo Suppression Note • For detailed instructions on using this feature via PDM see Auto False Echo Suppression (Page 76). • For detailed instructions on using this feature via the handheld programmer see Auto False Echo Suppression (2.8.7.1.).
Appendix A: Technical reference A.2 Echo Processing Example before Auto False Echo Suppression ① ② ③ ④ default TVT false echo material echo ⑤ ⑥ ⑦ high calibration point = 0 obstruction at 1.3. m material level at 3.
Appendix A: Technical reference A.2 Echo Processing A.2.7 Measurement Range Near Range (2.8.1.) Near Range programs SITRANS LR250 to ignore the zone in front of the antenna. The default blanking distance is 50 mm (1.97") from the end of the antenna. Near Range allows you to increase the blanking value from its factory default. But Auto False Echo Suppression (2.8.7.1.) is generally recommended in preference to extending the blanking distance from factory values. Far Range (2.8.2.
Appendix A: Technical reference A.3 Analog Output A.2.9 Damping Damping Filter (2.2.4.) smooths out the response to a sudden change in level. This is an exponential filter and the engineering unit is always in seconds. In 5 time constants the output rises exponentially: from 63.2% of the change in the first time constant, to almost 100% of the change by the end of the 5th time constant. Damping example time constant = 2 seconds input (level) change = 2 m A.
Appendix A: Technical reference A.3 Analog Output A.3.1 Sensor Mode This parameter controls the input. Depending on the reference point used, the measurement reports either Level, Space, or Distance. By default Sensor Mode is set to Level. Operation NO SERVICE a) Description Reference point Measurement and associated loop current not being updated. Device defaults to Failsafe mode a).
Appendix A: Technical reference A.3 Analog Output A.3.2 Current Output Function Current Output Function (2.6.1.) controls the mA output and applies any relevant scaling. By default it is set to Level. Other options are Space, Distance, and Volume. (The device can carry out a volume calculation only after a vessel shape has been specified.) When a volume application type is chosen, Sensor Mode remains as Level and the mA Output is automatically converted to Volume.
Appendix A: Technical reference A.3 Analog Output A.3.4 Fail-safe Mode The purpose of the Fail-safe setting is to put the process into a safe mode of operation in the event of a fault or failure. The value to be reported in the event of a fault is selected so that a loss of power or loss of signal triggers the same response as an unsafe level. LOE Timer (2.5.2.) determines the length of time a Loss of Echo (LOE) condition will persist before a Fail-safe state is activated.
Appendix A: Technical reference A.4 Maximum Process Temperature Chart A.4 Maximum Process Temperature Chart WARNING Internal temperature must not exceed +80 ° C (+176 °F). Note • The chart below is for guidance only. • The chart does not represent every possible process connection arrangement. For example, it will NOT apply if you are mounting SITRANS LR250 directly on a metallic vessel surface. • The chart does not take into consideration heating from direct sunshine exposure.
Appendix A: Technical reference A.5 Process Pressure/Temperature derating curves A.5 Process Pressure/Temperature derating curves WARNING • Never attempt to loosen, remove or disassemble process connection or device housing while vessel contents are under pressure. • Materials of construction are chosen based on their chemical compatibility (or inertness) for general purposes. For exposure to specific environments, check with chemical compatibility charts before installing.
Appendix A: Technical reference A.5 Process Pressure/Temperature derating curves A.5.1 Horn antenna WARNING Never attempt to loosen, remove or disassemble process connection or device housing while vessel contents are under pressure. Note Customer to provide adequate bolting and gasketing to retain vessel pressure and provide sufficient sealing. 1.
Appendix A: Technical reference A.5 Process Pressure/Temperature derating curves A.5.
Appendix A: Technical reference A.
Appendix A: Technical reference A.5 Process Pressure/Temperature derating curves 2", 3", and 4" Flanged Versions: 300 lb A.5.3 Flanged encapsulated antenna ASME B16.
Appendix A: Technical reference A.
Appendix A: Technical reference A.5 Process Pressure/Temperature derating curves A.5.
Appendix A: Technical reference A.6 Loop power A.6 Loop power Note Loop voltage is the voltage at the terminals of the power supply (not the voltage at the terminals of the device).
Appendix A: Technical reference A.6 Loop power A.6.1 Allowable operating area of SITRANS LR250 Note The curves below apply to a standalone device, configured via the Siemens handheld programmer. A.6.2 Curve 1 (General Purpose, Intrinsically Safe, Non-Sparking, Non-incendive) Loop Voltage versus Loop Resistance Note When using HART communications, the minimum voltage with 220 Ohms (RL) is 16.3 V DC.
Appendix A: Technical reference A.7 Startup behavior A.6.3 Curve 2 (Flameproof, Increased Safety, Explosion-proof) Loop Voltage versus Loop Resistance Note When using HART communications, the minimum voltage with 220 Ohms (RL) is 20.94 V DC. A.7 Startup behavior ● The device draws less than 3.6 mA at startup. ● Time to first measurement is less than 50 seconds.
Appendix B: HART communications B Highway Addressable Remote Transducer, HART, is an industrial protocol that is superimposed on the 4-20 mA signal. It is an open standard, and full details about HART can be obtained from the HART Communication Foundation website: HART Communication Foundation (http://www.hartcomm.org/) The radar device can be configured over the HART network using either the HART Communicator 375 by Fisher-Rosemount, or a software package.
Appendix B: HART communications B.4 HART Communicator 375 menu structure B.4 HART Communicator 375 menu structure Note HART Communicator 375 is supported by SITRANS LR250 HART.
Appendix B: HART communications B.
Appendix B: HART communications B.5 HART version B.5 HART version SITRANS LR250 conforms to HART rev. 5. B.5.1 Burst Mode SITRANS LR250 does not support burst mode. B.5.2 HART Multidrop Mode We do not recommend the use of HART Multidrop Mode.
Appendix C: Certificates and support C.1 C Certificates Certificates can be downloaded from our website at: Product page (http://www.siemens.com/LR250). C.2 Technical support If you have any technical questions about the device described in these Operating Instructions and do not find the right answers, you can contact Customer Support: ● Via the Internet using the Support Request: Support request (http://www.siemens.
Appendix C: Certificates and support C.2 Technical support Additional Support Please contact your local Siemens representative and offices if you have additional questions about the device Find your contact partner at: Local contact person (http://www.siemens.
13 List of abbreviations Short form Long form Description Units CE / FM / CSA Conformité Européene / Factory Mutual / Canadian Standards Association safety approval Ci Internal capacitance D/A Dialog to analog DCS Distributed Control System dK dielectric constant EDD Electronic Device Description FEA Flanged encapsulated antenna HART Highway Addressable Remote Transducer Ii Input current mA Io Output current mA IS Intrinsically Safe Li Internal inductance F control room appa
List of abbreviations SITRANS LR250 (HART) 246 Operating Instructions, 01/2014, A5E32220602-AB
LCD menu structure 14 Note • In Navigation mode, ARROW keys ( ) navigate the menu in the direction of the arrow. See Parameter Reference (Page 113) for detailed information and instructions.
LCD menu structure SITRANS LR250 (HART) 248 Operating Instructions, 01/2014, A5E32220602-AB
LCD menu structure SITRANS LR250 (HART) Operating Instructions, 01/2014, A5E32220602-AB 249
LCD menu structure SITRANS LR250 (HART) 250 Operating Instructions, 01/2014, A5E32220602-AB
LCD menu structure SITRANS LR250 (HART) Operating Instructions, 01/2014, A5E32220602-AB 251
Glossary accuracy degree of conformity of a measure to a standard or a true value. algorithm a prescribed set of well-defined rules or processes for the solution of a problem in a finite number of steps. ambient temperature the temperature of the surrounding air that comes in contact with the enclosure of the device. antenna an aerial which sends out and receives a signal in a specific direction. There are four basic types of antenna in radar level measurement, horn, parabolic, rod, and waveguide.
Glossary beam width the angle diametrically subtended by the one-half power limits (-3 dB) of the microwave beam. blanking a blind zone extending away from the reference point plus any additional shield length.The device is programmed to ignore this zone. capacitance the property of a system of conductors and dielectrics that permits the storage of electricity when potential differences exist between the conductors.
Glossary echo a signal that has been reflected with sufficient magnitude and delay to be perceived in some manner as a signal distinct from that directly transmitted. Echoes are frequently measured in decibels relative to the directly transmitted signal. Echo Confidence describes the quality of an echo. Higher values represent higher quality. Echo Threshold defines the minimum value required for an echo to be accepted as valid and evaluated.
Glossary HART Highway Addressable Remote Transducer. An open communication protocol used to address field instruments. Hertz (Hz): unit of frequency, one cycle per second. 1 Gigahertz (GHz) is equal to 109 Hz. horn antenna a conical, horn-shaped antenna which focuses microwave signals. The larger the horn diameter, the more focused the radar beam.
Glossary polarization the property of a radiated electromagnetic wave describing the time-varying direction and amplitude of the electric field vector. polarization error the error arising from the transmission or reception of an electromagnetic wave having a polarization other than that intended for the system. propagation factor (pf) where the maximum velocity is 1.0, pf is a value that represents a reduction in propagation velocity as a result of the wave travelling through a pipe or medium.
Glossary repeatability the closeness of agreement among repeated measurements of the same variable under the same conditions. sensor value the value produced by the echo processing which represents the distance from sensor reference point to the target. (see Sensor Mode (2.2.2.) for an illustration). shot one transmit pulse or measurement. speed of light the speed of electromagnetic waves (including microwave and light) in free space. Light speed is a constant 299, 792, 458 meters per second.
Index see stillpipe, 20 A Abbreviations and identifications list, 245 access control remote access, 163 activating, 35 agitator blade detection avoiding, 135 AMS Device Manager features, 89 analog output explanation, 224 fail signal, 183 select, 81 signal range, 183 simulate via PDM, 81 analog output scale setup, 122 antenna replacement, 169 antenna types flanged encapsulated antenna, 201, 203 flanged horn antenna, 197 flanged horn antenna with extension, 199 threaded horn, 191 threaded PVDF antenna, 205 A
Index flat face flange, 212 raised face flange, 207, 209 threaded horn with extension, 193 threaded PVDF antenna, 205 E echo confidence parameter setup, 136 echo processing Process Intelligence, 216 Echo Profile data logging, 74 view via LUI, 51 view via PDM, 73 Echo Profile Utilities Auto False Echo Suppression, 72 Echo Profile, 72 TVT Shaper, 72 echo selection Algorithm, 218 CLEF (Constrained Leading Edge Fit), 218 Position algorithm, 218 time varying threshold (TVT), 217 Echo Setup quick access via PDM
Index K key functions edit mode, 45 navigation mode, 42 L Language, 164 LCD display contrast adjustment, 161 echo profile viewing, 51 fast mode, 161 measurement mode, 36 lens replacement, 170 lid-lock set screw, 26 linearization via AMS, 93 Local User Interface (LUI), 36 LOE Fail-safe Mode, 227 loop test simulate analog output, 82 loop voltage vs.
Index requirements, 25 power supply requirements loop voltage vs.
Index contact information, 243 temperature de-Rating curves, 229 test loop test, 82 threaded connection markings, 205 threaded horn antenna dimensions, 193 threaded PVDF antenna dimensions, 205 trend view trend line, 85 troubleshooting communication, 171 operation, 178 TVT (time varying threshold) explanation, 217 TVT Shaper manual adjustment via PDM, 75 via PDM, 72 U unlock value local access, 163 V vessel shape selection, 126 W Wear powered hours, 83 poweron resets, 83 view via PDM, 83 wiring cables,
Index SITRANS LR250 (HART) 264 Operating Instructions, 01/2014, A5E32220602-AB
www.siemens.com/processautomation For more information www.siemens.com/level www.siemens.com/weighing Siemens AG Subject to change without prior notice Industry Sector A5E32220602 Rev. AB 1954 Technology Drive © Siemens AG 2013 P.O. Box 4225 Peterborough, ON Canada K9J 7B1 email: techpubs.smpi@siemens.com www.siemens.
