Other Possible Entries - Pepperl+Fuchs LUC-T Series Manual

Echo quality
The quality of the ultrasonic echo is shown in
matrix fields V0H8 and V0H9 via the bargraph.
• Poor echo quality due to fumes, dust,
internal fittings, foam, higher measuring
distance etc.:
2
V H
3 2
• Smooth liquid surface does not affect the
echo:
10
V H
3 2
Positioning the sensor
When mounting use the bargraph display for
echo quality to determine the correct
installation point. Internal fittings which intrude
too far into the measuring zone of the sensor
reflect the ultrasonic echo. Interfering signals
can be eliminated by selecting a different
sensor position or activating the fixed target
suppression function.
Fixed target echo suppression
The fixed target suppression function is used
when the level echo is not detected because a
fitting is generating a stronger interference
echo. Up to three interference echoes can be
suppressed. The suppression should be
activated with the tank as empty as possible.
# VH Entry
1 V0H8 Determine the measuring distance
(e. g. 1.2 m/3.9 ft) and check echo
quality
Wait until a stable value is displayed
2 V3H0 e. g. 3.000 H Known distance
(9.8 ft) from the surface
of material
(e. g. 3 m/9.8 ft)
2-wire instruments: wait approx. 40 s
3 V0H8 Measuring distance approx. 9.8 ft?
YES – suppression completed
NO – repeat procedure
Echo
Step 1
V H
1 .283
08
Step 3
1.2 m
V H
3.01 0
08
3 m
Distance
14.4

Other possible entries

Text
max. 3
interference
echos
working
echo
e
25