8 Parameter reference Note • See Enter PROGRAM mode under LCD Display (Page 39) for detailed instructions. • To view a particular parameter in AMS, see Operating via AMS Device Manager (Page 63). • Do not use the handheld programmer at the same time as AMS Device Manager, or erratic operation may result. • For Quick Access to parameters via the handheld programmer, press Home , then enter the menu number, for example: 2.2.1. to access parameter Hardware Revision (2.2.1.).
Parameter reference Quick Start (1.) Note For detailed instructions see Quick Start Wizard via the handheld programmer (Page 48) or Quick Start Wizard via AMS Device Manager (Page 70). Setup (2.) Note • See Parameter menus (Page 42) or Operating via AMS Device Manager (Page 63) for instructions. • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • Values shown in the following tables can be entered via the handheld programmer. Identification (2.1.
Parameter reference Message (2.1.3.) Read only. Text that can be used in any way. Limited to 32 ASCII characters. No specific recommended use. To access this parameter via AMS Device Manager see Identification under Identification (RESOURCE). (Page 97) Device (2.2.) Hardware Revision (2.2.1.) Read only. Corresponds to the electronics hardware of the Field Device. Firmware Revision (2.2.2.) Read only. Corresponds to the software or firmware that is embedded in the Field Device. Loader Revision (2.2.3.
Parameter reference PV Units (volume/level) (2.3.3.) Note • Default unit of AIFB 1 or 2 is percent. • You can select a different unit for your application. • PV (Primary Value): the output from the Level Transducer Block. See Level Transducer Block (LTB) and How the LTB works: in manual Foundation Fieldbus for Level Instruments (7ML19985MP01) for more details. Select units for either volume or level.
Parameter reference LOE Timer (2.3.6.) Note See Loss of Echo (LOE) (Page 239) for more detail. Sets the time to elapse since the last valid reading, before the Fail-safe material level is reported.
Parameter reference Calibration (2.3.7) Low Calibration Pt. (2.3.7.1.) Distance from sensor reference point to Low Calibration Point (corresponding to Low Level Point). Units are defined in Unit (2.3.1.).
Parameter reference High Calibration Point (2.3.7.2.) Distance from sensor reference point 1) to High Calibration Point (corresponding to High Level Point). Units are defined in Unit (2.3.1.). See Low Calibration Point (2.3.7.1.) for an illustration. Values Range: 0.00 to 20.00 m. Default 0.00 m Related parameters Unit (2.3.1.), Near Range (2.5.1.) When setting the High Calibration Point value, note that echoes are ignored within Near Range (2.5.1.).
Parameter reference Level Offset (2.3.7.6.) A constant offset that can be added to Level. The unit is defined in Level Unit (2.3.2.). Values Range: -999999 to +999999 Default: 0% Rate (2.3.8.) Response Rate (2.3.8.1.) Sets the reaction speed of the device to measurement changes. Note Changing Response Rate resets Fill Rate per Minute (2.3.8.2), Empty rate per Minute (2.3.8.3), and Shots (2.5.6.). Response Rate (2.3.8.1.) * Slow Fill Rate per Minute (2.3.8.2.)/ Empty rate per Minute (2.3.8.3.
Parameter reference Fill Rate per Minute (2.3.8.2.) Defines the maximum rate at which the reported sensor value is allowed to decrease. Allows you to adjust the SITRANS LR250 response to decreases in the actual material level. Fill Rate is automatically updated whenever Response Rate (2.3.8.1.) is altered. Sensor value is the value produced by the echo processing which represents the distance from sensor reference point to the target [see Low Calibration Point (2.3.7.1.) for an illustration].
Parameter reference Vessel Shape (2.4.1.1.) 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, level breakpoints, volume breakpoints Linearization Table must be selected in order for level/volume values [see XY index (2.
Parameter reference Maximum Volume (2.4.1.2.) The maximum volume of the vessel. Units are defined in PV Units (volume/ level) (2.3.3.). Enter the vessel volume corresponding to High Calibration Point. The volume calculation is based on the maximum volume and scaled according to the vessel shape selected. If no vessel shape is entered, the default is 100, and the reading will be a percentage value. Values Range: 0.0000 to 999999 Default: 100.0 Related Parameters Low Calibration Pt. (2.3.7.1.
Parameter reference XY index (2.4.1.5.) Level/Volume breakpoints allow you to define a complex vessel shape as a series of segments. A value is assigned to each level breakpoint and a corresponding value is assigned to each volume breakpoint. Volume values are defined in volume units and can be percent or volumetric; level values are defined in level units, and can be percent or linear. Level values Range: 0.0000 to 999999 (m, cm, mm, ft, in, %) Default: 0.0 Volume values Range: 0.
Parameter reference Entering breakpoints via the hand-held programmer: 1. The default for level values is percent: if you want to select units instead, navigate to Setup (2.) > Sensor (2.3.) > Level Unit (2.3.2.), and select the desired unit. 2. Navigate to Setup (2.) > Sensor (2.3.) > PV Units (volume/level) (2.3.3.), and select the desired volume units. 3. Go to XY index (2.4.1.5.) and enter the number of the breakpoint you wish to adjust: for example, for breakpoint 1 enter 1. 4. Go to X value (2.4.1.6.
Parameter reference Far Range (2.5.2.) Note Far Range can extend beyond the bottom of the vessel. Allows the material level to drop below Low Calibration Point without generating a Loss of Echo (LOE) state. See Low Calibration Pt. (2.3.7.1.) for an illustration. Values Range: Min. = Low Calibration Pt. Max. = 33 m (108.27 ft) Default: Value for Low Calibration Pt. + 1 m (3.28 ft) Related parameters Unit (2.3.1.) CLEF (Constrained Leading Edge Fit) Range (2.5.7.4.
Parameter reference Propogation Factor (2.5.3.) Note • When operating in a stillpipe, values for CLEF Range (2.5.7.4.), 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 Nominal Pipe Sizea) Range: 0.3 to 1.0 depending on pipe size. Default: 1.0000 40 mm (1.
Parameter reference Minimum Sensor Value (2.5.4.) The minimum usable value for the measuring range, in units defined in Unit (2.3.1.). (Default = 0.0 m) To view this parameter via AMS Device Manager see Range under Signal Processing (LTB) (Page 84). Maximum Sensor Value (2.5.5.) The maximum usable value for the measuring range, in units defined in Unit (2.3.1.). (Default = 33.0 m) To view this parameter via AMS Device Manager see Range under Signal Processing (LTB) (Page 84). Shots (2.5.6.
Parameter reference Position Detect (2.5.7.2.) 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 (2.5.7.4.
Parameter reference CLEF Range (2.5.7.4.) Note CLEF Range is referenced from Low Calibration Point (process empty level). 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 234).
Parameter reference Echo Lock (2.5.8.1.) Note Ensure the agitator is always running while SITRANS LR250 is monitoring the vessel, to avoid stationary blade detection. Selects the measurement verification process. See Echo Lock (2.5.8.1.) for more details. Options Lock Off (no verification) Maximum Verification * Material Agitator Total Lock Related parameters Fill Rate per Minute (2.3.8.2.) Empty Rate per Minute (2.3.8.3.) Up Sampling (2.5.8.2.) Down Sampling (2.5.8.3.
Parameter reference Echo Quality (2.5.9.) Confidence (2.5.9.1.) Indicates echo reliability: higher values represent better echo quality. The display shows the echo confidence of the last measurement. Echo Threshold (2.5.7.3.) defines the minimum criterion for echo confidence. Values (view only) 0 to 99 Echo Threshold (2.5.7.3.) Related Parameters Open the menu Device – Echo Profile Utilities and click on the tab Echo Profile. Echo Strength (2.5.9.2.
Parameter reference Auto False Echo Suppression (2.5.10.1.) Used together with Auto False Echo Suppression Range (2.5.10.2.) 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 236) for a more detailed explanation. Before Auto False Echo Suppression ① ② ③ TVT Hover Level default TVT ④ ⑤ echo marker material level false echo 1.
Parameter reference After Auto False Echo Suppression ① false echo ② learned TVT ③ Auto False Echo Suppression Range ④ ⑤ ⑥ material level default TVT echo marker To use Auto False Echo Suppression via AMS Device Manager note value calculated in step 1 and see Auto False Echo Suppression (Page 85). Auto False Echo Suppression Range (2.5.10.2.) Defines the endpoint of the Learned TVT distance. Units are defined in Unit (2.3.1.). Values Range: 0.00 to 30.00 m Default: 1.00 m 1.
Parameter reference Hover Level (2.5.10.3.) 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 (2.5.10.1) for an illustration. Values Range: 0 to 100% Default: 40% When the device is located in the center of the vessel, the TVT hover level may be lowered to increase the confidence level of the largest echo.
Parameter reference Breakpoint 1-9 (2.5.11.1.) Values Range: –100 to +100 bits (equivalent to – 50 to +50 dB) Default: 0 dB Breakpoint 10-18 (2.5.11.2.) Values Range: –100 to +100 bits (equivalent to – 50 to +50 dB) Default: 0 dB Breakpoint 19-27 (2.5.11.3.) Values Range: –100 to +100 bits (equivalent to – 50 to +50 dB) Default: 0 dB Breakpoint 28-36 (2.5.11.4.) Values Range: –100 to +100 bits (equivalent to – 50 to +50 dB) Default: 0 dB Breakpoint 37-40 (2.5.11.5.
Parameter reference AIFB1 (2.6.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated. • All AIFB parameters are read only via LUI and AMS Device Manager, and can only be changed using a remote host such as DeltaV or NI-FBUS Configurator. • AIFB 1 and AIFB 2 are not active out of the box. These blocks will show Out of Service on the LCD at startup.
Parameter reference Channel (2.6.3.) Used to select between the different Level Transducer Block outputs. Options Description LEVEL/VOLUME Level value converted to Volume [through Low Calibration Point Linearization (2.4.
Parameter reference Upper Value (2.6.4.2.) Defines the operational upper range value of the input value (Process Value Scale) in PV (volume/level) Units. Process Value Scale normalizes the input value to a customer-defined range. Values Range: -999999 to 999999 Default: 100 % Provides Output values (Out) to AIFB 1 or AIFB 2 Unit (2.6.4.3.) Engineering unit to be displayed with the output value.
Parameter reference Upper Value (2.6.5.2.) Defines the operational upper range value of the output value in AIFB1 units. Values Range: -999999 to 999999 Default: 100% Unit (2.6.5.3.) Engineering unit to be displayed with the output value. Values m, cm, mm, ft, in, cu m, L, HL, cu in, cu ft, cu yd, gal, imp gal, bushels, Bbl, Bbl liquid, percent, PA, Follow out unit * % Decimal Point (2.6.5.4.) Read only. The number of digits to display after the decimal point (set to two decimal places).
Parameter reference Low Limit Warning (2.6.6.3.) The setting for the lower warning limit in AIFB1 units. Values Range: -Infinity to Infinity Default: -Inf Low Limit Alarm (2.6.6.4.) The setting for the lower alarm limit in AIFB1 units. Values Range: -Infinity to Infinity Default: -Inf Limit Hysteresis (2.6.6.5.) Hysteresis is used to adjust the sensitivity of the trigger for alarm messages. It is used to compensate when a process variable fluctuates around the same value as a limit.
Parameter reference AIFB 2 (2.7.) See AIFB1 (2.6.): the parameters for AIFB 2 are identical to AIFB 1. Measured Values (2.8.) (for diagnostic purposes) Read only. Allows you to view measured values for diagnostic purposes. Main Output (PV - Primary Value) (2.8.1.) The value for level, or volume (if volume conversion is selected). In AMS Device Manager, see Process Variables Level Transducer Block-LTB (Page 114). Output, no linearization (SV1 - Secondary Value 1) (2.8.2.) The value for level.
Parameter reference Fault Reset (3.2.) Clears faults (see chart below). Clearing a fault in one parameter of a ’maintenance pair’, automatically clears a fault in the second parameter of the pair. For example, entering S3 or S4 will clear a fault on Device Lifetime Reminder 1 (Maintenance Required), and on Device Lifetime Reminder 2 (Maintenance Demanded). This applies when clearing faults via the handheld programmer, or the 375 Field Communicator.
Parameter reference Peak Values (3.4.) Minimum Measured Value (3.4.1.) The minimum recorded Sensor value, reported in units defined in Unit (2.3.1.). Maximum Measured Value (3.4.2.) The maximum recorded Sensor value, reported in units defined in Unit (2.3.1.). Service (4.) Note Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated.
Parameter reference Master Reset (4.1.) Note • The following parameters are not reset by any reset type: Write Protection, PIN to Unlock, Auto False Echo Suppression Range, Learned TVT. • While an FF Object Dictionary Reset is in progress, do not perform an action using the local display interface until the reset is complete. This could cause a temporary loss of communications. Reset Type Factory Defaults Result Default. Resets all user parameters to the manufacturer’s default settings.
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 Activation of Reminders (4.2.4.) Allows you to enable a maintenance reminder. Options REMinder 1 (Maintenance REQuired) REMinder 2 (Maintenance DEManded) REMinders 1 AND 2 (Maintenance Required and Maintenance Demanded) * OFF 1. First set the reminder values in Reminder 1 before Lifetime (Required) (4.2.5.)/Reminder 2 before Lifetime (Demanded) (4.2.6.). 2. Select the desired Activation of Reminders option. Reminder 1 before Lifetime (Required) (4.2.5.) If Remaining Lifetime (4.2.3.
Parameter reference Acknowledge Status (4.2.8.) Indicates which level of maintenance reminder has been acknowledged. Acknowledge (4.2.9.) Acknowledges the current maintenance reminder. To acknowledge a reminder via the handheld programmer: 1. Press RIGHT arrow twice to open parameter view and activate Edit Mode. 2. Press RIGHT arrow to acknowledge the reminder. Remaining Sensor Lifetime (4.3.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated.
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: ● Via the handheld programmer, manually reset Time in Operation (4.3.2.) to zero. Remaining Lifetime (4.3.3.) Read only. Lifetime (expected) (4.3.1.) less Time in Operation (4.3.2.). Activation of Reminders (4.3.4.) Allows you to enable a maintenance reminder.
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 20 years Default: 0.019 years 1. Modify limit 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 • 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 Calibration Schedule (4.5.).
Parameter reference Activation of Reminders (4.4.4.) Allows you to enable a maintenance reminder. Options * Timer OFF ON NO LIMITS 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 Service (Required) (4.4.5.)/Reminder 2 before Service (Demanded) (4.4.6.). 2. Select the desired Activation of Reminders option. Reminder 1 before Service (Required) (4.4.5.) If Time Until Next Service (4.
Parameter reference Acknowledge Status (4.4.8.) Indicates which level of maintenance reminder has been acknowledged. Acknowledge (4.4.9.) Acknowledges the current maintenance reminder. To acknowledge a reminder via the handheld programmer: 1. Press RIGHT arrow twice to open parameter view and activate Edit Mode. 2. Press RIGHT arrow to acknowledge the reminder. Calibration Schedule (4.5.) Note • Default settings in the parameter tables are indicated with an asterisk (*) unless explicitly stated.
Parameter reference Time Since Last Calibration (4.5.2.) Time elapsed since last calibration. Can be reset to zero after performing a calibration. To reset to zero: ● Via the handheld programmer, manually reset Time Since Last Calibration (4.5.2.) to zero. 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.) Allows you to enable a maintenance reminder.
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 20 years Default: 0.019 years 1. Modify limit 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 Power-on Resets (4.8.) Read only. The number of power cycles that have occurred since manufacture. To view via AMS Device Manager see Wear under Maintenance & Diagnostics (RESOURCE) (Page 102). 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.) • LCD Fast Mode affects Measurement mode only; it has no effect on Navigation mode.
Parameter reference Simulate Enable (4.12.) Replaces a physical jumper switch found on some FF devices to enable simulation when set to ON. (Available only via LUI.) Options * OFF Simulation Disabled ON Simulation Enabled For more information on Simulation, see Simulation (Input) under Operation (LTB) (Page 78) in AMS Device Manager. [See also Simulation under How the AIFB works in manual Foundation Fieldbus for Level Instruments (7ML19985MP01)]. Communication (5.
Parameter reference Manufacturer (5.3.) Name of manufacturer associated with this device. Device Type Identification (5.4.) Hexadecimal integer defined by Siemens to uniquely identify each product with manufacturer’s Id. (LR250 FF device=0x1954.) Device Revision (5.5.) Manufacturer’s revision number associated with this device. ITK Version (5.6.) Major revision number of the interoperability test case used to register this device. Security (6.
Parameter reference Local Access (6.2.) Write Protection (6.2.1.) Note Do not lose this number value. Prevents any changes to parameters via AMS Device Manager or the handheld programmer. Hand-held programmer values 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.). ● To turn Lock Off, key in the Unlock Value stored in PIN to Unlock (6.2.2.).
Parameter reference Local Operation (6.2.3.) Enables or disables programming via the handheld programmer. Options DISABLED * ENABLED Note Once disabled via the handheld programmer, the parameter is no longer visible via LUI and can only be reset using AMS Device Manager. However, if no communication activity exists for 30 seconds, the parameter will again be visible via LUI. To access this parameter via AMS Device Manager see Local Display under Setup (LCD) (Page 95). Language (7.
Parameter reference 8.1 Alphabetical parameter list 8.1 Alphabetical parameter list Note For a detailed list of parameters see Parameter Reference (Page 129). Acknowledge (4.2.9.) Acknowledge (4.3.9.) Acknowledge (4.4.9.) Acknowledge (4.5.9.) Acknowledge Status (4.2.8.) Acknowledge Status (4.3.8.) Acknowledge Status (4.4.8.) Acknowledge Status (4.5.8.) AIFB1 (2.6.) AIFB2 (2.7.) Alarms and Warnings (2.6.6.) Algorithm (2.5.7.1.) Auto False Echo Suppression (2.5.10.1.) Auto False Echo Suppression Range (2.5.
Parameter reference 8.1 Alphabetical parameter list Decimal Point (2.6.5.4.) Descriptor (2.1.2.) Device (2.2.) Device Address (5.2.) Device Revision (5.5.) Device Type Identification (5.4.) Diagnostics (3.) Dimension A (2.4.1.3.) Dimension L (2.4.1.4.) Display (2.6.7.) Down Sampling (2.5.8.3.) Echo Lock (2.5.8.1.) Echo Profile (3.1.) Echo Quality (2.5.9.) Echo Select (2.5.7.) Echo Strength (2.5.9.2.) Echo Threshold (2.5.7.3.) Electronics Temperature (3.3.) Empty Rate per Minute (2.3.8.3.) Far Range (2.5.2.
Parameter reference 8.1 Alphabetical parameter list Language (7.) LCD Contrast (4.10.) LCD Fast Mode (4.9.) Level Offset (2.3.7.6.) Level Unit (2.3.2.) Lifetime (expected) (4.2.1.) Lifetime (expected) (4.3.1.) Limit Hysteresis (2.6.6.5.) Linearization (2.4.) Loader Revision (2.2.3.) Local Access (6.2.) Local Operation (6.2.3.) Loss of Echo (LOE) Timer (2.3.6.) Low Calibration Point. (2.3.7.1.) Low Level Point (2.3.7.4.) Low Limit Alarm (2.6.6.4.) Low Limit Warning (2.6.6.3.) Lower Value (2.6.4.1.
Parameter reference 8.1 Alphabetical parameter list Measured Values (2.8.) Message (2.1.3.) Minimum Measured Value (3.4.1.) Minimum Sensor Value (2.5.4.) Minimum Value (3.3.1.) Mode (2.6.2.) Near Range (2.5.1.) Output Scaling (2.6.5.) Output, no level offsets (SV2 – Secondary Value 2) (2.8.3.) Output, no linearization (SV1 – Secondary Value 1) (2.8.2.) Peak Values (3.4.) Position Detect (2.5.7.2.) Powered Hours (4.7.) Power-on Resets (4.8.) Propagation Factor (2.5.3.) PV (volume/level) Units (2.3.3.
Parameter reference 8.1 Alphabetical parameter list Response Rate (2.3.8.1.) Sampling (2.5.8.) Secondary Value (4.11.) Security (6.) Sensor (2.3.) Sensor Offset (2.3.7.3.) Service (4.) Service Interval (4.4.1.) Service Schedule (4.4.) Setup (2.) Shaper Mode (2.5.10.4.) Shots (2.5.6.) Signal Processing (2.5.) Simulate Enable (4.12) Static Revision Number (2.6.1.) Tag (2.1.1.) Tag (5.1.) Temperature Units (2.3.4.) Time Until Next Calibration (4.5.3.) Time Until Next Service (4.4.3.
Parameter reference 8.1 Alphabetical parameter list XY index (2.4.1.5.) Y value (2.4.1.7.
Parameter reference 8.
Service and maintenance 9.1 9 Maintenance 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 9.3 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 23).
10 Diagnosing and troubleshooting 1. Check the following: – There is power at the device. – The LCD shows the relevant data. – If any fault codes are being displayed see General Fault Codes (Page 190) 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 FF. • Make sure Remote Lockout (6.1.1.
Diagnosing and troubleshooting If you continue to experience problems go to our website and check the FAQs for SITRANS LR250: Product page (http://www.siemens.com/LR250), or contact your Siemens representative.
Diagnosing and troubleshooting 10.1 Device status icons 10.
Diagnosing and troubleshooting 10.2 General fault codes 10.2 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. Code/ Icon Meaning Corrective Action S: 0 The device was unable to get a measurement within the Fail-safe LOE Timer period. Possible causes: faulty installation, antenna material buildup, foaming/other adverse process conditions, invalid configuration range.
Diagnosing and troubleshooting 10.2 General fault codes Code/ Icon Meaning Corrective Action S: 10 Input parameters Low Calibration Point (2.3.7.1.) and High Calibration Point (2.3.7.2.) are the same. • Check calibration settings of device. • Ensure settings for High Calibration Point and Low Calibration Point are different. S: 11 Internal temperature sensor failure. Repair required: contact your local Siemens representative.
Diagnosing and troubleshooting 10.2 General fault codes Code/ Icon Meaning Corrective Action S: 35 Factory calibration for the device has been lost. Repair required: contact your local Siemens representative 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.
Diagnosing and troubleshooting 10.2 General fault codes Code/ Icon Meaning Corrective Action S: 99 Prof. Clip Hardware problem. If fault persists contact your local Siemens representative. S: 100 Few Shots Hardware problem. If fault persists contact your local Siemens representative. S: 101 Meas. Err. Reset configuration. If fault persists contact your local Siemens representative and provide configuration file and FB schedule. S: 102 No Shots Hardware problem.
Diagnosing and troubleshooting 10.2 General fault codes Code/ Icon Meaning Corrective Action S: 111 BC Duration Hardware problem. If fault persists contact your local Siemens representative. S: 112 CPU Fault Hardware problem. If fault persists contact your local Siemens representative. S: 113 Data Bus Hardware problem. If fault persists contact your local Siemens representative. S: 114 Addr Bus Hardware problem. If fault persists contact your local Siemens representative.
Diagnosing and troubleshooting 10.3 Operation troubleshooting 10.3 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. (2.3.7.1.) • increase Confidence (2.5.9.1.
Diagnosing and troubleshooting 10.3 Operation troubleshooting Symptom Cause Action Reading erratic echo confidence weak • refer to Confidence (2.5.9.1.) • use Auto False Echo Suppression (2.5.10.1.) and Auto False Echo Suppression Range (2.5.10.2.) • use foam deflector or stillpipe • decrease Fill Rate (2.3.8.2..) • relocate device to side pipe • increase confidence threshold in Echo Threshold (2.5.7.3.) material filling • Re-locate SITRANS LR250 Reading response slow Fill Rate (2.3.8.
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.
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) 1.5" antenna, and 2" threaded PVDF 10 m (32.
Technical data 11.3 Interface 11.
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 203). • 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 LR250 version Approval rating Valid for: Non-hazardous General purpose CSAUS/C, FM, CE, C-TICK N. America, Europe Radio Europe (R&TTE), FCC, Industry Canada Intrinsically safe (Page 32) ATEX II 1G, Ex ia IIC T4 Ga ATEX II 1D, Ex ia ta IIIC T100 °C Da Europe IECEx SIR 09.0148X, Ex ia IIC T4 Ga Ex ia ta IIIC T100 °C Da International FM/CSA Class I, Div.
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.
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 129) 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 236) for more details.
Appendix A: Technical reference A.2 Echo processing Position Detect (2.5.7.2.) 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 (2.5.3.) for values]. There are three options: ● Center ● Hybrid (Center and CLEF) ● CLEF (Constrained Leading Edge Fit) Center Uses center of the echo.
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 (2.5.7.4.) is referenced from Low Calibration Point (process empty level). When the Hybrid algorithm is selected in Position Detect (2.5.7.2.), the CLEF algorithm will be applied up to the limit of CLEF Range. Above this limit the Center algorithm will be applied.
Appendix A: Technical reference A.2 Echo processing A.2.4 Measurement Response Note Units are defined in Units (2.3.1.) and are in meters by default. Response Rate (2.3.8.1.) limits the maximum rate at which the display and output respond to changes in the measurement. There are three preset options: slow, medium, and fast. Once the real process fill/empty rate (m/s by default) is established, a response rate can be selected that is slightly higher than the application rate.
Appendix A: Technical reference A.2 Echo processing A.2.6 Echo Lock If the echo selected by Algorithm is within the Echo Lock window, the window is centered about the echo, which is used to derive the measurement. In radar applications, two measurement verification options are used: Lock Off SITRANS LR250 responds immediately to a new selected echo (within the restrictions set by the Maximum Fill / Empty Rate), but measurement reliability is affected.
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.2.8 Measurement Range Near Range (2.5.1.) 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 (2.5.10.1.) is generally recommended in preference to extending the blanking distance from factory values. Far Range (2.5.2.
Appendix A: Technical reference A.2 Echo processing A.2.10 Loss of Echo (LOE) A loss of echo (LOE) occurs when the calculated measurement is judged to be unreliable because the echo confidence value has dropped below the echo confidence threshold. Confidence (2.5.9.1.) describes the quality of an echo. Higher values represent higher quality. Echo Threshold (2.5.7.3.) defines the minimum confidence value required for an echo to be accepted as valid and evaluated.
Appendix A: Technical reference A.3 Maximum Process Temperature Chart A.3 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.4 Process Pressure/Temperature derating curves A.4 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.4 Process Pressure/Temperature derating curves A.4.1 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.4 Process Pressure/Temperature derating curves A.4.
Appendix A: Technical reference A.
Appendix A: Technical reference A.4 Process Pressure/Temperature derating curves 2", 3", and 4" Flanged Versions: 300 lb A.4.3 Flanged encapsulated antenna ASME B16.
Appendix A: Technical reference A.
Appendix A: Technical reference A.4 Process Pressure/Temperature derating curves A.4.
Appendix A: Technical reference A.
Appendix B: Communications via Foundation Fieldbus B SITRANS LR250 (Foundation Fieldbus) is an FF (H1) device of Class 31PS, and 32L. It supports publish and subscribe functionality as well as Backup LAS functionality. The full range of SITRANS LR250 functions is available only over an FF network. Foundation Fieldbus (FF) is an open industrial protocol. Full details about FF can be obtained from: Foundation Fieldbus (http://www.fieldbus.
Appendix B: Communications via Foundation Fieldbus B.
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 AIFB Analog Input Function Block CE / FM / CSA Conformité Européene / Factory Mutual / Canadian Standards Association Ci Internal capacitance D/A Dialog to analog DCS Distributed Control System dK dielectric constant EDD Electronic Device Description FEA Flanged encapsulated antenna Description Units safety approval F control room apparatus Ii Input current mA Io Output current mA IS Intrinsically Safe Li Internal inductance mH
List of abbreviations SITRANS LR250 (FOUNDATION FIELDBUS) 254 Operating Instructions, 01/2014, A5E32221411-AB
LCD menu structure 14 Note • In Navigation mode, ARROW keys ( ) navigate the menu in the direction of the arrow. See Parameter Reference (Page 129) for detailed information and instructions.
LCD menu structure SITRANS LR250 (FOUNDATION FIELDBUS) 256 Operating Instructions, 01/2014, A5E32221411-AB
LCD menu structure SITRANS LR250 (FOUNDATION FIELDBUS) Operating Instructions, 01/2014, A5E32221411-AB 257
LCD menu structure SITRANS LR250 (FOUNDATION FIELDBUS) 258 Operating Instructions, 01/2014, A5E32221411-AB
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 capacitance the property of a system of conductors and dielectrics that permits the storage of electricity when potential differences exist between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference, and the unit is a Farad. confidence see Echo Confidence. damping term applied to the performance of a device to denote the manner in which the measurement settles to its steady indication after a change in the value of the level.
Glossary 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. Echo Lock Window a window centered on an echo in order to locate and display the echo’s position and true reading. Echoes outside the window are not immediately processed. Echo Marker a marker that points to the processed echo. Echo Processing the process by which the radar unit determines echoes.
Glossary inductance the property of an electric circuit by virtue of which a varying current induces an electromotive force in that circuit or in a neighboring circuit. The unit is a Henry. multiple echoes secondary echoes that appear as double, triple, or quadruple echoes in the distance from the target echo. Near Blanking see Blanking. nozzle a length of pipe mounted onto a vessel that supports the flange.
Glossary range distance between a transmitter and a target. range extension the distance below the zero percent or empty point in a vessel. relative humidity the ratio of the actual amount of moisture in the atmosphere to the maximum amount of moisture the atmosphere could hold (which varies depending on the air temperature). repeatability the closeness of agreement among repeated measurements of the same variable under the same conditions. shot one transmit pulse or measurement.
Glossary SITRANS LR250 (FOUNDATION FIELDBUS) 264 Operating Instructions, 01/2014, A5E32221411-AB
Index A Abbreviations and identifications list, 253 access control local access, 176 remote access, 175 activating LR250, 37 agitator blade detection avoiding, 148 AMS Device Manager features, 65 antenna replacement, 185 antenna types flanged encapsulated antenna, 215, 217 flanged horn antenna, 211 flanged horn antenna with extension, 213 threaded horn, 205 threaded PVDF antenna, 219 Auto False Echo Suppression explanation, 236 setup, 150 B beam angle flanged encapsulated antenna, 215, 217 flanged horn, 21
Index Echo Profile view via LUI, 53 echo selection Algorithm, 231 CLEF (Constrained Leading Edge Fit), 232 Position algorithm, 232 time varying threshold (TVT), 231 edit mode handheld programmer, 43 key functions, 47 Empty rate setup, 137 enable/disable remote operation, 175 enclosure opening, 26 F factory defaults Master Reset, 162 false echo see Auto False Echo Suppression, 236 Far Range explanation, 238 setup, 143 fault codes general fault codes, 190 Fill Rate setup, 137 Filter Time Constant explanatio
Index explanation, 239 Loss of Echo (LOE) explanation, 239 LUI (Local User Interface) contrast adjustment, 39 M maintenance cleaning, 185 repairs, 185 replacing antenna, 185 replacing lens, 186 maintenance settings Calibration Interval, 170 see Diagnostics, 159 see Remaining Sensor Lifetime, 166 Service Interval, 168 Master Reset factory defaults, 162 measurement range blanking via Near Range, 238 extension via Far Range, 238 Measurement Response explanation, 235 mounting bypass requirements, 20 handheld
Index Remote Lockout, 175 repair cautions, 185 excluded liability, 185 reset see Master Reset, 162 Response Rate explanation, 235 setup, 136 S safety notes, 11 security local access unlock value, 176 password protection via AMS, 116 sensor reference point flanged encapsulated antenna, 215, 217 flanged horn, 211, 213 flat faced flange, 226 raised face flange, 220, 222 threaded horn, 207, 209 threaded PVDF horn, 219 sidepipe see bypass pipe, 20 SITRANS LR250 operating principles, 229 startup transition scre
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 A5E32221411 Rev. AB 1954 Technology Drive © Siemens AG 2013 P.O. Box 4225 Peterborough, ON Canada K9J 7B1 email: techpubs.smpi@siemens.com www.siemens.
