User's Manual

7ML19985LT01 SITRANS LR560 (PROFIBUS PA) – OPERATING INSTRUCTIONS Page 71
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Parameters
2.4.5. Echo select
2.4.5.1. Algorithm
Selects the algorithm to be applied to the echo profile to extract the true
echo.
2.4.5.2. Position Detect
Defines where on the echo the distance measurement is determined. See
Position Detect (2.4.5.2.) on page 116 for more detail.
If the vessel bottom is being reported as the level instead of the actual
material level (at low level conditions) we recommend setting Position
Detect to Hybrid and using it in combination with CLEF Range (2.4.5.4.).
Options
ALF Area Largest First
AEcho Area
L Largest echo
* F First Echo
AL Area Largest
AF Area First
LF Largest First
BLF Best F-L (First and Largest)
BL Best L (Largest)
BF Best F (First)
Last
TF true First echo
Note: Selecting Steel or Concrete vessel type in the Quick Start wizard
changes the setting for Position Detect (2.4.5.2.) to Rising Edge.
Options
*
Rising Edge (yields highest stability on sloped
targets)
Center (yields higher accuracy on flat, non-
sloped targets)
Hybrid (Center and CLEF)
CLEF (Constrained Leading Edge Fit)
Related parameters
CLEF Range (2.4.5.4.)