User's Manual

7ML19985LY01 SITRANS LR560 (FF) – INSTRUCTION MANUAL Page 87
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Parameters
1.2. AFES (Auto False Echo Suppression) Wizard
If you have a vessel with known obstructions, we recommend using AFES to prevent
false echo detection.
This feature can also be used if SITRANS LR560 displays a false high level, or the
reading is fluctuating between the correct level and a false high level.
a) Make sure the material level is below all known obstructions.
b) Navigate to Level Meter >
Diagnostics (3.) > Echo Profile (3.1.)
and press RIGHT arrow to
request a profile.
c) Determine a range that includes the
false echo but not the true echo: in
the example, 3.3 m.
d) Open the AFES wizard and press
DOWN arrow to continue.
e) Press RIGHT arrow to edit Auto
False Echo Suppression Range.
f) Enter the new range value and press
RIGHT arrow to transfer it.
(continued on next page)
Notes:
• Before using AFES wizard, configure the device via the Quick Start wizard.
• Make sure material level is below all known obstructions at the moment Auto
False Echo Suppression is used to learn a custom TVT (Time Varying
Threshold). We recommend an empty or almost empty vessel.
• Note the distance to material level when the environment is learned, and set
Auto False Echo Suppression Range to a shorter distance to avoid the material
echo being screened out.
false
echo
true
echo
AFES range