User's Manual
Table Of Contents
- SITRANS LR250 (HART)
- Legal information
- Table of contents
- 1 Introduction
- 2 Safety notes
- 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
Remote operation
7.1 Operating via SIMATIC PDM
SITRANS LR250 (HART)
76 Operating Instructions, 01/2014, A5E32220602-AB
7.1.6.5
Auto false echo suppression
Note
•
Ensure material level is below all known obstructions when using Auto False Echo
Suppression to learn the echo profile. An empty or almost empty vessel is recommended.
•
Note the distance to material level when learning the echo profile, and set Auto False
Echo Suppression Range to a shorter distance to avoid the material echo being screened
out.
•
Set Auto False Echo Suppression and Auto False Echo Suppression Range during
startup, if possible.
•
If the vessel contains an agitator it should be running.
•
Before adjusting these parameters, rotate the device for best signal (lower false-echo
amplitude).
If you have a vessel with known obstructions, use Auto False Echo Suppression to prevent false
echo detection. This feature can also be used if the device displays a false high level, or the
reading is fluctuating between the correct level and a false high level.
The device learns the echo profile over the whole measurement range and the TVT is shaped
around all echoes present at that moment. See Auto False Echo Suppression (Page 221
)
for a
more detailed explanation.