Siemens SITRANS L Operating Instructions Manual page 239

Auto False Echo Suppression Range must be set to a distance shorter than the distance to the
material level when the environment was learned, to avoid the material echo being screened
out.
Example before Auto False Echo Suppression
①
②
③
④
Example after Auto False Echo Suppression
①
②
③
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH
Default TVT
False echo
Material echo
Sensor reference point
Learned TVT
False echo
Auto False Echo Suppression Range
Appendix A: Technical reference
⑤ High calibration point = 0
⑥ Obstruction at 1.3. m
⑦ Material level at 3.2 m
④ Default TVT
⑤ Material echo
⑥ Echo marker
A.2 Echo processing
Auto False Echo
Suppression
Range set to 2 m
239