Siemens sitrans PROBE LU - Page 33

A5E32337695 SITRANS Probe LU (HART) – OPERATING INSTRUCTIONS Page 27
Operation
8. Enable False-Echo Suppression (P837: Auto False-Echo Suppression
1
)
Use this feature to ignore false echoes before the material echo. Use P838 to set the Auto
TVT distance first.
Setup Auto False-Echo Suppression:
a. Perform this function when the vessel is empty or nearly empty.
b. Determine actual distance from transducer face to material level.
c. Press PROGRAM
,
then DISPLAY
.
d. Select P838 and key in [distance to material level minus 0.5 m].
e. Press ENTER .
f. Select P837.
g. Press 2 and then press ENTER . P 837 will automatically revert to 1 (use
Learned TVT) after a few seconds.
9. Press PROGRAM to return to RUN mode.
1.
False echoes can be caused by obstructions within the beam path. For more detail, see TVT
adjustment parameters, page 60, and TVT curves, page 89.
Parameter Values Description
P837
0*Off
1 Use "learned" TVT
2 "Learn"
Display after Auto False Echo Suppression
TVT curve
(learned)
material
level
false
echo
Distance (meters)
Level (db)