Siemens Sitrans LR250, Operating Instructions Manual, Page: 123 / 306

Parameter reference
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
121
Minimum Sensor Value (2.5.4.)
The minimum recorded Sensor value in units defined in Unit (2.3.1.).
1.
Open the menu View – Device Diagnostics, select Device Status, and click on the Device
Status tab.
2. Check Sensor Peak Values.
Maximum Sensor Value (2.5.5.)
The maximum recorded Sensor value in units defined in Unit (2.3.1.).
1.
Open the menu View – Device Diagnostics, select Device Status, and click on the Device
Status tab.
2. Check Sensor Peak Values.
Shots (2.5.6.)
The number of echo profile samples averaged to produce a measurement.
Values Range: 1 to 25
Default: 25
Echo Select (2.5.7.)
Algorithm (2.5.7.1.)
Selects the algorithm to be applied to the echo profile to extract the true echo.
Options * tF True First echo
L Largest echo
BLF Best of Largest and First echo
Position Detect (2.5.7.2.)
Note
If a stillpipe is used, the setting for CLEF range is determined by the horn size: see CLEF
Range (2.5.7.4.) for a table of values.
Defines where on the echo the distance measurement is determined.
Options Center
* Hybrid (Center and CLEF)
CLEF (Constrained Leading Edge Fit)
Related parameters CLEF Range (2.5.7.4.)
If the vessel bottom is being reported as the level instead of the actual material level (at low level
conditions), or if the dielectric constant of the liquid to be monitored is less than 3, we
recommend setting Position Detect to Hybrid and CLEF Range (2.5.7.4.) to 0.5 m (1.64 ft).