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
7ML19985LY01 SITRANS LR560 (FF) – INSTRUCTION MANUAL Page 137
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D: Technical Reference
Appendix D: Technical Reference
Principles of Operation
SITRANS LR560 is a 2-wire 78 GHz FMCW radar level transmitter for continuous
monitoring of solids in vessels
1)
. Radar level measurement uses the time of flight
principle to determine distance to a material surface.
FMCW radar transmits a continuous wave. The frequency of the wave is constantly
increasing: this is known as the sweep. By the time the first part of the wave has been
reflected off the target and returned to the device, the part of the wave that is just being
emitted is at a higher frequency. The difference in frequency between the transmitted and
received signals is proportional to time of flight.
Electromagnetic wave propagation is virtually unaffected by temperature or pressure
changes, or by changes in the vapor levels inside a vessel. Electromagnetic waves are
not attenuated by dust.
SITRANS LR560 consists of an enclosed electronic circuit coupled to an antenna and
process connection. The electronic circuit generates a radar signal (78 GHz) that is
directed to the antenna.
The signal is emitted from the antenna, and the reflected echoes are digitally converted
to an echo profile. The profile is analyzed to determine the distance from the sensor
reference point
2)
to the material surface. This value (sensor value) is used as a basis for
calculating the display of material level.
Process Variables
The Process Variables are sensor value and measured value. Sensor value is the
distance from the sensor reference point (flange face) to the material surface. Since
LR560 does not support Volume, the Measured value can be either Level (distance from
low calibration point to material surface), or Distance (distance from sensor reference
point to the material surface).
Note: Where the number follows the parameter name [for example, Algorithm (2.4.5.1.)]
this is the parameter access number via the handheld programmer. See
Parameter
Reference
on page 86 for a complete list of parameters.
1)
The microwave output level is significantly less than that emitted from cellular phones.
2)
See
Dimensions
on page 12.