7.6.4.4 AFES wizard
Used to prevent false echo detection over a specied range.
Use AFES wizard if there are known obstructions in the application and if false echoes are
anticipated. Perform the AFES wizard when the material level is low.
To run the wizard, enter the auto false echo suppression range.
Auto false echo suppression range
Sets end point of the learned TVT distance.
To calculate value
1. Determine the auto false echo suppression range by measuring the actual distance from the
sensor reference point to the material surface using a rope or tape measure.
2. Subtract 0.5 m (20") from this distance and use the resulting value.
Note
F
or best results with AFES
• Set up auto false echo suppression during commissioning if possible, by running "Auto false
echo suppression wizard".
• Ensure material level is below all known obstructions at the moment when "Auto false echo
suppression wizard" learns the TVT. Ideally the vessel should be empty or almost empty.
• Use auto false echo suppression only if target is greater than one meter from sensor reference
point
• Note the distance to material level when learning the echo prole, and set value in parameter
"Auto false echo suppression range" to a shorter distance to avoid the material echo being
screened out.
• If the vessel contains an agitator, it should be running.
Once the wizard completes successfully, parameter "Auto false echo suppression" is set to
"Enabled" and t
he learned TVT will be used.
For more information about auto false echo suppression, see Auto false echo suppression
and Custom TVT (Page202).
Conrm
Applies settings as last step in wizard.
Conrm - settings
Setting Yes Wizard completes and settings are applied.
No Returned to start of wizard. (Settings are saved to perform wizard
ag
ain, but not applied until "Conrm" set to "Yes".)
Default No
Commissioning
7.6Local commissioning
SITRANS LR500 series with mA/HART
82 Operating Instructions, 03/2024, A5E51099898-AA
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