What if Input Scaling Upper and lower values for AIFB1 are the same on Siemens Sitrans LR250?
If the upper and lower values for AIFB1 Input Scaling (2.6.5.) are the same on your Siemens Transmitter, check the configuration for AIFB1. Ensure that the Upper Value and Lower Value (Input Scaling) are not identical.
What if Low Calibration Point and High Calibration Point input parameters are the same on Siemens Sitrans LR250 Transmitter?
If the Low Calibration Point (1.6.) and High Calibration Point (1.7.) input parameters are the same on your Siemens Transmitter, check the calibration settings of the device. Ensure that the settings for the High Calibration Point and Low Calibration Point are different.
Why can't I set a SITRANS LR250 parameter via remote communications?
If you are unable to change a SITRANS LR250 parameter via remote communications, ensure that Remote Lockout (6.1.1.) is disabled and that Write Protection (6.2.1.) is set to the unlock value.
What to do if internal temperature of Siemens Sitrans LR250 Transmitter has exceeded specifications?
If the internal temperature of your Siemens Transmitter has exceeded specifications, relocate the device and/or lower the process temperature to cool it. Inspect for heat-related damage. Note that the fault code will persist until a manual reset is performed using SIMATIC PDM or the LCD interface.
What causes Siemens Sitrans LR250 to fail to get a measurement within the Fail-safe LOE Timer period?
If your Siemens Transmitter fails to get a measurement within the Fail-safe LOE Timer period, it may be due to faulty installation, antenna material buildup, foaming or other adverse process conditions, or an invalid configuration range. Make sure the installation details are correct, ensure there is no antenna material buildup (clean if necessary), adjust process conditions to minimize foam or other adverse conditions, and correct the configuration range.
What to do if Siemens Transmitter reading does not change, but the level does?
If the reading on your Siemens SITRANS LR250 Transmitter does not change even when the level does, it could be processing the wrong echo, such as from a vessel wall or structural member. Try re-locating the SITRANS LR250, checking the nozzle for internal burrs or welds, rotating the device 90°, or using Auto False Echo Suppression (2.5.10.1.).
What to do if SITRANS LR250 Transmitter parameter remains unchanged?
If a SITRANS LR250 parameter remains unchanged when set via remote communications: * Ensure Write Protect is set to the unlock value, then try setting the parameter via the handheld programmer. * Ensure Access Control is set to Read/Write. * Some parameters can be changed only when the device is not scanning. Try pressing Mode to put the device into PROGRAM mode.
How to fix a Siemens Measuring Instruments when the measurement is consistently off?
If the Siemens Measuring Instruments measurement is consistently off by a constant amount, the setting for 2.2.1.6. Low Calibration Pt. or 2.2.1.19. Sensor Offset might not be correct. Check the distance from the sensor reference point to 2.2.1.6. Low Calibration Pt., and check 2.2.1.19. Sensor Offset.
What to do if PLC value equals display value but does not correspond to actual material level on Siemens Transmitter?
If the PLC value equals the display value but does not correspond to the actual material level on your Siemens Transmitter, ensure the Scaling in AIFB1 and the High Calibration Point are correctly entered. You may also want to view the echo profile to see if the wrong echo is being selected.
Why is the level reading lower than the actual material level on my Siemens Sitrans LR250 Transmitter?
If the level reading is lower than the actual material level on your Siemens LR250 Transmitter, it could be because the material is within the Near Range zone or because the vessel is near empty with low dK material. To resolve this, decrease the Near Range (2.5.1.) (minimum value depends on antenna type), raise the SITRANS LR250, or ensure Algorithm (2.5.7.1.) is set to tF (First echo). If the vessel is near empty with low dK material, ensure the Material (1.2.) selection is LIQUID LOW DK, set Position Detect (2.5.7.2.) to Hybrid, and check the setting for CLEF Range (2.5.7.4.) referring to the table below Propagation Factor (2.5.3.) for recommended settings.
General| Accuracy | ± 2 mm |
|---|---|
| Power Supply | 10.5 to 42 V DC |
| Measurement Principle | Radar |
| Process Temperature | -40 to +80 °C |
| Process Pressure | Up to 40 bar |
| Output Signal | 4 to 20 mA HART |
| Communication | HART |
| Enclosure Rating | IP68 |
| Housing Material | Aluminum, stainless steel |
Stresses observing instructions and device symbols for safe operation.
Details qualifications required for personnel working in hazardous areas.
Gives general notes and notices for correct mounting procedures.
Details nozzle design requirements and recommendations for various antenna types.
Gives warnings about power source and loss of protection due to installation.
Outlines the three wiring options for hazardous areas.
Details intrinsically safe wiring and ATEX certificate information.
Lists ATEX directive instructions for equipment safety in hazardous areas.
Provides notes and instructions for using the Quick Start Wizard.
Introduces SIMATIC PDM as a software for device commissioning and maintenance.
Explains how to configure a new device using SIMATIC PDM.
Guides through the Quick Start wizard using SIMATIC PDM.
Explains how to change parameter settings using SIMATIC PDM.
Provides notes on parameter names, menu structure, and quick access.
Lists parameters related to Quick Start, Language, Material, Response Rate, Units, and Operating Mode.
Details Material, LOE Timer, and Calibration parameters.
Explains Low Calibration Pt. and High Calibration Pt. parameters.
Details Response Rate, Fill Rate, and Empty Rate parameters.
Explains Linearization and Vessel Shape parameters.
Covers Near Range and Far Range parameters for signal processing.
Details TVT Setup and Auto False Echo Suppression parameters.
Explains how to set the PROFIBUS address and notes on address lock.
Provides safety warnings regarding impermissible repair and releasing key locks.
Outlines periodic inspection points and safety warnings for maintenance in hazardous areas.
Provides steps to troubleshoot communication issues, including wiring and addresses.
Lists general fault codes, their meanings, and corrective actions.
Details common operating symptoms, causes, and resolutions.
Explains the signal processing technology known as Process Intelligence.
Explains Echo Threshold and Echo Lock parameters.
Introduces Auto False Echo Suppression and its purpose.
Details Near Range and Far Range parameters for measurement.
Explains Measurement Response and Damping parameters.
Explains Loss of Echo (LOE) and its conditions.
Explains PROFIBUS address identification and setting.
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