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.
What does it mean when my Siemens Sitrans LR250 Transmitter triggers a Maintenance Required reminder?
When a Siemens Transmitter triggers a Maintenance Required reminder because it is nearing its lifetime limit as defined in 4.2.3.Remaining Lifetime, replacement is recommended.
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 to do if level reading is lower than material level on Siemens Measuring Instruments?
If the Siemens Measuring Instruments level reading is lower than the material level, it could be because the material is within the Near Range zone or multiple echoes are being processed. Decrease 2.2.1.11. Near Range (minimum value depends on antenna type), raise the SITRANS LR250, and ensure 2.2.4.1.1. Algorithm is set to F (First echo). Another cause might be a vessel near empty with low dK material. Ensure 2.2.1.2. Material selection is LIQUID LOW DK, set 2.2.4.1.2. Position to Hybrid, and set 2.2.4.4.3. CLEF Range to 0.5 m.
Why is the reading erratic on my Siemens Measuring Instruments?
If the Siemens Measuring Instruments reading is erratic, it may be due to a weak echo confidence. Refer to 2.2.4.5.1. Confidence, use 2.2.5.6. Auto False Echo Suppression and 2.2.5.7. Auto Suppression Range, and consider using a foam deflector or stillpipe. Another cause could be a liquid surface vortex. Decrease 2.2.7.2. Fill Rate, relocate the instrument to a side pipe, or increase the confidence threshold in 2.2.4.1.3. Echo Threshold. Material filling can also cause erratic readings, so try relocating the SITRANS LR250.
How to improve the slow reading response on Siemens Measuring Instruments?
If the Siemens Measuring Instruments reading response is slow, the 2.2.7.2. Fill Rate setting might be incorrect. Increase the measurement response if possible.
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.
What to do if the PLC value is not equal to the displayed value on Siemens Sitrans LR250 Transmitter?
If the PLC value doesn't match the displayed value on your Siemens LR250 Transmitter, verify you are looking at the right spot in the PLC. Also, ensure scaling hasn't been programmed into the PLC, as all scaling should be performed by the LR250. Finally, check the network to confirm the PLC is communicating with the LR250.
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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