Sitron SLU, Руководство по установке, Страница: 5 / 24

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
Fig. 8: Level meter installation in silo or hopper
horn
adapter
5
If the emitted ultrasonic signal of the level meter is affected by features, objects or obstructions (roughness on walls of the
tank, large welds, inner tank partitions, mixers etc.), it is necessary to map the false reflections by activating the mode
"TEACHING". In case of installed mixers, it is necessary to put the sensor in line with the mixer. (Fig.5 and 6).
Do not install the level meter directly in or above the filling point (Fig.7)
When measuring the level of bulk-solids, the measurement range is
reduced (due to absorption of ultrasonic waves by the bulk medium),
shortening the measuring range by up to 50% depending on the grain
material and size. We therefore recommend selecting a level meter with
greater range than the maximum measuring range for the application. It
is also appropriate to use a directional horn (see image 8), which
reduces the shortening of the measuring range, because enhances the
concentration of the acoustic energy while preserving the same beam
angle, and improves the sensitivity when receiving the reflected echo.
We recommend that Sitron is fully consulted before a model is selected.
Installation Manual