Operating Instructions
Table Of Contents
- SITRANS LR250 with mA/HART
- Legal information - Warning notice system
- Table of contents
- 1 Introduction
- 2 Safety information
- 3 Description
- 4 Installing/mounting
- 5 Connecting
- 6 Commissioning
- 7 Remote operation
- 7.1 Operating via SIMATIC PDM
- 7.1.1 Functions in SIMATIC PDM
- 7.1.2 Initial setup
- 7.1.3 Updating the Electronic Device Description (EDD)
- 7.1.4 Quick Start Wizard via SIMATIC PDM
- 7.1.5 Changing parameter settings using SIMATIC PDM
- 7.1.6 Parameters accessed via pull-down menus
- 7.1.6.1 Echo profile utilities
- 7.1.6.2 Echo profile
- 7.1.6.3 View saved echo profiles
- 7.1.6.4 TVT Shaper
- 7.1.6.5 Auto false echo suppression
- 7.1.6.6 Echo setup
- 7.1.6.7 Maintenance
- 7.1.6.8 Select analog output
- 7.1.6.9 Self test
- 7.1.6.10 Loop test
- 7.1.6.11 Configuration flag reset
- 7.1.6.12 Master reset
- 7.1.6.13 Wear
- 7.1.6.14 HART Communication
- 7.1.6.15 Process variables
- 7.1.6.16 Trend
- 7.1.6.17 Device status
- 7.1.6.18 Update
- 7.1.6.19 Security
- 7.2 Operating via AMS Device Manager
- 7.3 Operating via FDT (Field Device Tool)
- 7.1 Operating via SIMATIC PDM
- 8 Parameter reference
- 9 Service and maintenance
- 10 Diagnosing and troubleshooting
- 11 Technical data
- 12 Dimension drawings
- 12.1 Universal polymeric flange
- 12.2 Aluminum horn antenna
- 12.3 Mounting bracket
- 12.4 Aluminum horn with polypropylene lens antenna and polymeric flange
- 12.5 Stainless steel threaded horn antenna
- 12.6 Stainless steel threaded horn antenna with extension
- 12.7 Stainless steel flanged horn antenna
- 12.8 Stainless steel flanged horn antenna with extension
- 12.9 PTFE Flanged encapsulated antenna (2"/DN50/50A sizes only)
- 12.10 PTFE Flanged encapsulated antenna (3"/DN80/80A sizes and larger)
- 12.11 Hygienic encapsulated antenna (2" ISO 2852 sanitary clamp)
- 12.12 Hygienic encapsulated antenna (3" ISO 2852 sanitary clamp)
- 12.13 Hygienic encapsulated antenna (4" ISO 2852 sanitary clamp)
- 12.14 Hygienic encapsulated antenna (DN50 nozzle/slotted nut to DIN 11851)
- 12.15 Hygienic encapsulated antenna (DN80 nozzle/slotted nut to DIN 11851)
- 12.16 Hygienic encapsulated antenna (DN100 nozzle/slotted nut to DIN 11851)
- 12.17 Hygienic encapsulated antenna (DN50 aseptic slotted nut to DIN 11864-1)
- 12.18 Hygienic encapsulated antenna (DN80 aseptic slotted nut to DIN 11864-1)
- 12.19 Hygienic encapsulated antenna (DN100 aseptic slotted nut to DIN 11864-1)
- 12.20 Hygienic encapsulated antenna (DN50 aseptic flange to DIN 11864-2)
- 12.21 Hygienic encapsulated antenna (DN80 aseptic flange to DIN 11864-2)
- 12.22 Hygienic encapsulated antenna (DN100 aseptic flange to DIN 11864-2)
- 12.23 Hygienic encapsulated antenna (DN50 aseptic clamp to DIN 11864-3)
- 12.24 Hygienic encapsulated antenna (DN80 aseptic clamp to DIN 11864-3)
- 12.25 Hygienic encapsulated antenna (DN100 aseptic clamp to DIN 11864-3)
- 12.26 Hygienic encapsulated antenna (Tuchenhagen Type N)
- 12.27 Hygienic encapsulated antenna (Tuchenhagen Type F)
- 12.28 Threaded PVDF antenna
- 12.29 Threaded connection markings
- 12.30 Raised-Face flange
- 12.31 Raised-Face flange per EN 1092-1 for flanged encapsulated antenna
- 12.32 Flat-Face flange
- 12.33 Aseptic/hygienic flange DN50, DN80, DN100 for DIN 11864-2
- 12.34 Process connection tag (pressure rated versions)
- A Appendix A: Technical reference
- A.1 Principles of operation
- A.2 Echo Processing
- A.3 Analog Output
- A.4 Maximum Process Temperature Chart
- A.5 Process Pressure/Temperature derating curves
- A.5.1 Pressure Equipment Directive, PED, 14/68/EU
- A.5.2 Stainless steel horn antenna
- A.5.3 Stainless steel flanged horn antenna
- A.5.4 PTFE flanged encapsulated antenna
- A.5.5 Aluminum horn, with polypropylene lens antenna version with polypropylene flange
- A.5.6 PVDF antenna
- A.5.7 Hygienic encapsulated antenna
- A.6 Loop power
- A.7 Startup behavior
- B Appendix B: HART communications
- C Appendix C: Certificates and support
- 13 List of abbreviations
- 14 LCD menu structure
- Glossary
- Index
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 (2.8.4.1.)
The true echo is selected based on the setting for the Echo selection algorithm. Options are true
First Echo, Largest Echo, or best of First and Largest.
Position Detect (2.8.4.2.)
The echo position detection algorithm determines which point on the echo will be used to
calculate the precise time of flight, and calculates the range using the calibrated propagation
velocity (see Propagation Factor (2.8.3.) for values). There are three options:
● Center
● Hybrid
● CLEF (Constrained Leading Edge Fit)
Center
Uses center of the echo.
Hybrid
Uses the Center algorithm for the top part of the vessel, and the CLEF algorithm for the part
nearest the vessel bottom, according to the setting for CLEF range.
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
Vessel height: 1.5 m; CLEF range set to 0 (Center algorithm gives the same result.)
Appendix A: Technical reference
A.2 Echo Processing
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 225