Measurement Range - Siemens SITRANS LUT400 Operating Instructions Manual

Auto False Echo Suppression Range must be set to a distance shorter than the distance
to the material level when the environment was learned, to avoid the material echo being
screened out.
Example before Auto False Echo Suppression
default
TVT
Example after Auto False Echo Suppression
false echo

Measurement Range

Near Range
Near Range (2.2.4.) programs SITRANS LUT400 to ignore the area in front of the
transducer. The default blanking distance is 27.8 cm (0.91 ft) from the sensor reference
point.
Near Range allows you to increase the blanking value from its factory default. But Shaper
Mode (2.12.3.4.) is generally recommended in preference to extending the blanking
distance from factory values.
Far Range
Far Range (2.2.5.) can be used in applications where the base of the vessel is conical or
parabolic. A reliable echo may be available below the vessel empty distance, due to an
indirect reflection path.
Increasing Far Range by 30% or 40% can provide stable empty vessel readings.
A5E33329501
false
echo
material
0 0
0
learned
TVT
0 0
Distance
SITRANS LUT400 (HART) – OPERATING INSTRUCTIONS
echo
0
Auto False Echo
Suppression Range
default
TVT
material
echo
echo
marker
0
sensor reference point
High Cal. Pt. = 1 m
obstruction at 13 m
material level at 31 m
Low Cal. Pt. = 45 m
Auto False Echo
Suppression
Range set to 20 m
0
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