User's Manual

Page 85 SITRANS LR 460 – INSTRUCTION MANUAL 7ML19985JM01
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F: Technical Reference
When you set Auto False-Echo Suppression to Learn, the instrument learns the echo
profile at that moment
1
. Then it uses the learned profile instead of the default TVT curve,
for the distance set in Auto False Echo Suppression Distance. The learned profile
(learned TVT curve) follows the echo profile, so that no large false echoes rise above the
learned TVT curve. From the end of the Auto False-Echo Suppression Distance, the
default TVT curve is used. The material level echo rises above this, and is selected as the
true echo.
See page 69 for examples of the echo profile before and after using Auto False-Echo
Suppression.
1.
Set Auto False-Echo Suppression to Learn when the material level is substantially lower than
process full level (ideally when the tank is empty or almost empty).