What to do if the screen is blank on Siemens Measuring Instruments?
If the Siemens Measuring Instruments screen is blank, it could be due to a power error. Check the nameplate rating against the voltage supply and inspect the power wiring or source. Alternatively, too much load resistance may be the cause. Try changing the barrier type, removing something from the loop, or increasing the supply voltage.
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.
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.
What to do if the reading does not change, but the level does, on Siemens Measuring Instruments?
If the Siemens Measuring Instruments reading does not change, but the level does, the SITRANS LR250 might be processing the wrong echo, such as the vessel wall or a structural member. Try relocating the SITRANS LR250, check the nozzle for internal burrs or welds, rotate the instrument 90°, and use 2.2.5.6. Auto False Echo Suppression and 2.2.5.7. Auto Suppression Range.
Why does my Siemens Measuring Instruments occasionally read high when the vessel is not full?
If the Siemens Measuring Instruments reads correctly but occasionally reads high when the vessel is not full, it might be detecting a close range echo, build up near the top of the vessel or nozzle, or a nozzle problem. Clean the antenna and use 2.2.5.6. Auto False Echo Suppression and 2.2.5.7. Auto Suppression Range.
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.
What does S: 0 LOE mean on my Siemens Measuring Instruments display?
If the Siemens Measuring Instruments display shows S: 0 LOE, it could be because the level or target is out of range. Check the specifications, check 2.2.1.6. Low Calibration Pt., and increase 2.2.4.5.1. Confidence. Another reason could be material build-up on the antenna. Clean the antenna or relocate the SITRANS LR250. Poor location or aiming, such as a poor installation or a flange not being level, can also cause this. Check to ensure the nozzle is vertical and use 2.2.5.6. Auto False Echo Suppression and check 2.2.5.7. Auto Suppression Range to ensure the nozzle protrudes from the end of the nozzle. Finally, an antenna malfunction due to temperature being too high, physical damage, excessive foam, or multiple echoes could be the cause. Check 3.14.1. Current Internal Temperature, use a ...
Why is the screen blank on my Siemens Sitrans LR250 Transmitter?
If the screen of your Siemens Transmitter is blank, it could be due to a power error or too much load resistance. First, check the nameplate rating against the voltage supply and inspect the power wiring or source. If the issue is load resistance, try changing the barrier type, removing something from the loop, increasing the supply voltage, reducing wire distance, or using larger gauge wire.
What to do if service interval as defined in Reminder 1 has expired on Siemens Transmitter?
If the service interval as defined in Reminder 1 (Required) (4.4.5.) has expired on your Siemens Transmitter, perform the required service.
What happens if calibration interval as defined in Reminder 2 has expired on Siemens Sitrans LR250?
If the calibration interval as defined in Reminder 2 (Demanded) (4.5.6.) has expired on your Siemens Transmitter, perform calibration.
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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