Mecon GmbH
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Mecon 01/2007
D-50169 Kerpen
Electromagnetic flow Sensor
mag-flux
F5
__
Installation
The measuring principle is generally independent of the flow
profile. Ideally, the device should be installed in a pipeline, which
has sufficient straight tubing before and after the measuring
point. In general, an inlet path of min. 5 x dia. and an outflow
zone of min. 2-3 x dia. is required.
Provided that constant turbulence does not enter the area in
which the measurement takes place (e.g. after elbows, during
tangential feeds or if the valve in front of the sensor is partially
open). In such cases measures to normalize the flow profile are
necessary. Suitable measures in this respect are:
·
increasing the inlet and outlet zones
·
using flow conditioners
·
reducing the inner diameter of the pipe
Fig. 2 Installation in horizontal and vertical pipelines
Installation may be horizontal or vertical (Fig. 2) but it must be
ensured that the axes of the electrodes run horizontally (the
direction arrow marks the electrode axes) to avoid measuring
errors due to deposits or air bubbles on the electrodes.
Fig. 3 Installation between pipe elbows, valves and pumps
The inlet and outlet zones must be kept straight (Fig. 3).
Fig. 4 Installation in a constantly filled pipe
The flow measuring device must be installed so that the
measuring pipe cannot run empty and is always filled with
medium. The sensor must be installed in a culvert in the case of
an unfilled pipe or only a free level line (outlet).
Fig. 5 Installation in pipes without emptying
The sensor should not be installed in pipe sections with a free
pipe outlet which could run empty (e.g. downpipes). When
installing in a downpipe make sure that the pipe is always filled
100% with the medium.
Fig. 6 Installation at the highest point
Avoid installation at the highest point of the pipe due to
accumulation of gas.
Fig. 7 Installation of several sensors, either in series or in parallel
If several sensors are series connected, the distance between the
individual sensors must be at least equal to the length of one
sensor. If two or more sensors are to be connected in parallel,
the distance must be at least 1 m.
