User's Manual
Table Of Contents
- Safety Notes
- FCC Conformity
- CE Electromagnetic Compatibility (EMC) Conformity
- Industry Canada
- The Manual
- Technical Support
- SITRANS LR560 Overview
- Specifications
- Installation
- Wiring
- Local Operation
- Operating via AMS Device Manager
- Functions in AMS Device Manager
- Programming via AMS Device Manager
- Adding a new device
- Startup
- Configuring a new device
- Changing Block Modes
- Configure/Setup Parameters
- Transducer Block Parameters
- Level Transducer Block Parameters
- Operation (LTB)
- Simulation (Input)
- Setup (LTB)
- General
- Calibration
- Rate
- Signal Processing (LTB)
- Range
- Echo Select
- Sampling
- Echo Quality
- Filtering
- TVT Setup
- TVT Shaper 1
- TVT Shaper 2
- TVT Shaper 3
- Echo Profile Parameters (view only)
- Maintenance & Diagnostics (LTB)
- Sensor Lifetime
- Service Schedule
- Communication (LTB)
- Communication:
- Configure/Setup (Liquid Crystal Display Block-LCD)
- Configure/Setup (Diagnostic Transducer Block-DIAG)
- Configure/Setup (Resource Block - RESOURCE)
- Device Diagnostics (Level Transducer Block - LTB)
- Device Diagnostics (Level Control Device Block - LCD)
- Device Diagnostics (Diagnostic Transducer Block - DIAG)
- Device Diagnostics (Resource Block - RESOURCE)
- Password Protection
- AMS Menu Structure
- 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 (Auto False Echo Suppression) Setup
- 2.4.9. TVT Shaper
- 2.4.9.1. Shaper 1-9
- 2.4.9.2. Shaper 10-18
- 2.4.9.3. Shaper 19-27
- 2.4.9.4. Shaper 28-36
- 2.4.9.5. Shaper 37-45
- 2.4.9.6. Shaper 46-54
- 2.4.9.7. Shaper 55-63
- 2.4.9.8. Shaper 64-72
- 2.4.9.9. Shaper 73-81
- 2.4.9.10. Shaper 82-90
- 2.4.9.11. Shaper 91-99
- 2.4.9.12. Shaper 100-108
- 2.4.9.13. Shaper 109-117
- 2.4.9.14. Shaper 118-120
- 2.5. AIFB 1
- 2.6. AIFB 2
- 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 Range
- Measurement Response
- Damping
- Loss of Echo (LOE)
- Temperature derating curves
- Appendix E: Communications
- Appendix F: Firmware Revision History
- Glossary
- Index
- LCD menu structure
Page 138 SITRANS LR560 (FF)– INSTRUCTION MANUAL 7ML19985LY01
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D: Technical Reference
Echo Processing
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.
Process Intelligence is able to differentiate between the true microwave reflections from
the surface of the material and unwanted reflections being returned from obstructions
such as seam welds or supports within a vessel. The result is repeatable, fast and
reliable measurement. This technology was developed as result of field data gained over
some twenty years from more than 1,000,000 installations in many industries around the
world.
Higher order mathematical techniques and algorithms are used to provide intelligent
processing of microwave reflection profiles. This “knowledge based” technique
produces superior performance and reliability.
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 (2.4.8.1.)
on page 142 for
more details.
The device characterizes all echoes that
rise above the TVT as potential good echoes. Each peak is assigned a rating based on its
strength, area, height above the TVT, and reliability, amongst other characteristics.
Algorithm (2.4.5.1.)
The true echo is selected based on the setting for the Echo selection algorithm. Options
are Area Largest First, Echo Area, Largest Echo, True First, Area Largest, Area First,
Largest First, Best of First or Largest, Best Largest, Best First, or LAST.
default TVT
material
level
echo marker
echo profile