User's Manual
Table Of Contents
- Safety Notes
- FCC Conformity
- CE Electromagnetic Compatibility (EMC) Conformity
- Industry Canada
- The Manual
- Technical Support
- Abbreviations and Identifications
- SITRANS LR560 Overview
- Specifications
- Installation
- Wiring
- Local Operation
- Operating via SIMATIC PDM
- Functions in SIMATIC PDM
- SIMATIC PDM Version
- Quick Start Wizard via SIMATIC PDM
- Changing parameter settings using SIMATIC PDM
- Operating via FDT (Field Device Tool)
- Parameter Reference
- 1. Quick Start
- 2. Setup
- 2.1. Identification
- 2.2. Device
- 2.3. Sensor
- 2.4. Signal Processing
- 2.4.1. Near Range
- 2.4.2. Far Range
- 2.4.3. Minimum Sensor Value
- 2.4.4. Maximum Sensor Value
- 2.4.5. Echo select
- 2.4.6. Sampling
- 2.4.7. Echo Quality
- 2.4.8. TVT setup
- 2.4.9. TVT shaper
- 2.4.9.1. Breakpoint 1-9
- 2.4.9.2. Breakpoint 10-18
- 2.4.9.3. Breakpoint 19-27
- 2.4.9.4. Breakpoint 28-36
- 2.4.9.5. Breakpoint 37-45
- 2.4.9.6. Breakpoint 46-54
- 2.4.9.7. Breakpoint 55-63
- 2.4.9.8. Breakpoint 64-72
- 2.4.9.9. Breakpoint 73-81
- 2.4.9.10. Breakpoint 82-90
- 2.4.9.11. Breakpoint 91-99
- 2.4.9.12. Breakpoint 100-108
- 2.4.9.13. Breakpoint 109-117
- 2.4.9.14. Breakpoint 118-120
- 2.5. AIFB1
- 2.6. AIFB2
- 2.7. Measured Values
- 2.8. Filtering
- 3. Diagnostics
- 4. Service
- 5. Communication
- 6. Security
- 7. Language
- Appendix A: Alphabetical Parameter List
- Appendix B: Troubleshooting
- Appendix C: Maintenance
- Appendix D: Technical Reference
- Principles of Operation
- Echo Processing
- Measurement Response
- Damping
- Loss of Echo (LOE)
- Temperature derating curve
- Appendix E: PROFIBUS PA Profile Structure
- Appendix F: Communications via PROFIBUS PA
- Appendix G: Firmware Revision History
- Glossary
- Index
- LCD menu structure
7ML19985LT01 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 117
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D: Technical Reference
CLEF (Constrained Leading Edge Fit)
• Uses the leading edge of the echo.
• Is used mainly to process the echo from materials with a low dK value.
In an almost empty flat-bottomed vessel, a low dK material may reflect an echo weaker
than the echo from the vessel bottom. The echo profile shows these echoes merging. The
device may then report a material level equal to or lower than empty
The CLEF algorithm enables the device to report the level correctly.
Example: CLEF off: Position set to Hybrid
Example: CLEF enabled
default TVT
vessel
bottom
echo
selected
material
echo
echo marker
Vessel height: 1.5 m; CLEF range set to 0 (Center algorithm gives the same result.)
default TVT
vessel
bottom
echo
material
echo
selected
echo marker
Vessel height: 1.5 m; CLEF range set to 0.5 m