User's Manual

Page 100 SITRANS LR560 (FF) – INSTRUCTION MANUAL 7ML19985LY01
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Parameters
2.4.8. TVT (Auto False Echo Suppression) Setup
2.4.8.1. Auto False Echo Suppression
Used together with Auto False Echo Suppression Range (2.4.8.2.) to screen
out false echoes in a vessel with known obstructions. A ’learned TVT’ (time
varying threshold) replaces the default TVT over a specified range.
a) Make sure material level is below all known obstructions when
Auto False Echo Suppression is used to learn the echo profile. (An
empty or almost empty vessel is recommended.)
b) Determine Auto False Echo Suppression Range. Measure the actual
distance from the sensor reference point to the material surface
using a rope or tape measure.
c) Subtract 0.5 m (20") from this distance, and enter the resulting value
in Auto False Echo Suppression Range.
Notes:
• Default settings in the parameter tables are indicated with an asterisk (*)
unless explicitly stated.
• We recommend using AFES Wizard. See
AFES (Auto False Echo
Suppression) Wizard1.2. on page 87.
Before Auto False
Echo Suppression
default TVT
TVT Hover
Level
Level (db)
echo marker
material
level
false echo