Microlectra Dinel ULM-70, Instruction Manual

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ULM–70 © Dinel, s.r.o. 7
• If the emitted acoustic signal of the level meter is affected by near objects (roughness on
walls of the tank, various partitions, mixers etc.), it is necessary to map false reflections
by activating the mode "TEACHING". In case of installed mixers, it is necessary to put the
mixers to position under the level meter (direct the mixer paddle to the ultrasonic signal
beam) (Fig. 5 and 6).
• Do not install the level meter in or above the filling point (Fig. 7).
Fig. 5: False echo from obstacles in the tank Fig. 6: False echo from the mixer paddle
Fig. 7: Level meter installation outside the influence of filling
• In case the level of bulk solids is measured,
the measurement range is reduced Due to
absorption of acoustic waves by a bulk me -
dium, shortening of the measuring range
occurs by up to 50% depending on the grain
size. We therefore recommend selecting a
level meter with greater range than the max-
imum range of measuring the medium. It is
also appropriate to use a directional horn
(see image 8), which reduces the shorten -
ing of the measuring range, because it bet -
ter concentrates acoustic energy while pre -
serving the same beam angle, and improves
the sensitivity when receiving the reflected
echo. We recommend to consult the use with
the manufacturer.
Fig. 8: Level meter installation in silo or hopper
horn
adapter