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Side 23
Ultrasonic Level Meter
Operation Manual
Connecting pipe and measuring casing used for drainage well measurement
For common well (including water source well and deep well), normally
the diameter is small and the best measuring effect can be reached by installing
measuring casing. The inner wall of measuring casing must be smooth (PVC
and PE pipe can be used) and the inside diameter shall be ≥150mm (measuring
range within 4m). The manufacturer shall be contacted for connecting pipe
longer than 4m. The measurement can be carried out as long as the measuring
casing is clean and free of attached medium and internal joint.
The measuring casing shall be soaked in the medium all the time, which
can ensure the accurate measurement within the measuring casing.
4.3.1 Solid measurement
4.3.1.1 Flange installation
Similar to liquid medium measurement, the meter can be installed on the
counter flange of container connecting pipe. The solid reflecting surface is
different from that of the liquid and it is not a plane, which shall be considered
during installation. The probe emitting surface shall be perpendicular to the
surface of solid to be measured and the probe shall be exposed from the
connecting pipe.
At the solid measurement site, in most cases, probe inside the connecting
pipe will lead to pulsating of measured data or “wave loss”.
To solve the problem, the universal flange can be used. In this case, the
probe emitting surface can easily be aligned to the reflecting surface of the
solid to be measured merely by rotating the flange.
