User's Manual

A5E32337683 SITRANS LR260 (HART) – OPERATING INSTRUCTIONS Page 55
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Parameters
2.2.4. Echo Processing (ECHO PROC.)
2.2.4.1. Echo select
2.2.4.1.1. Algorithm
Selects the algorithm to be applied to the echo profile to extract the true
echo.
2.2.4.1.2. Echo Position
Defines where on the echo the distance measurement is determined. (See
Echo Position Detection on page 97 for more details.)
2.2.4.1.3. Echo Threshold
Sets the minimum echo confidence that the echo must meet in order to
prevent a Loss of Echo condition and the expiration of the LOE timer.
When Echo Confidence exceeds the Echo Threshold, the echo is accepted
as a valid echo and is evaluated.
Use this feature when an incorrect material level is reported.
2.2.4.1.5. Echo Marker
The point on the selected echo from which the measured value is taken.
When SITRANS LR260 is using Rising Edge, higher values will cause lower
level readings and lower values will cause higher level readings.
Options
ALF
Area Largest First
A
Echo Area
L
Largest Echo
F
First echo
AL
Area Largest
AF
Area First
LF
Largest First
BLF
Best of Largest or First echo
BL
Best Largest
BF
Best First
L
Last echo
*TF
True First
Options
Rising Edge
* Center of Mass (COM)
Hybrid (Center and CLEF)
CLEF (Constrained Leading Edge Fit)
Values
Range: 0 to 99 dB
Default: 5
Related
Parameters
2.4.1. Fail-safe Timer
Values
Range: 5 to 95%
Default: 70%
Related
Parameters
2.2.4.1.2. Echo Position