VEGA VEGAPULS 56 Profibus PA - Manual (Page 33)

VEGAPULS 56 Profibus PA 33
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75 %
0 %
100 %
Mounting and installation
Strong product movements
Buildup
Inflowing material
Wrong Correct
Strong product movements
Strong turbulence in the vessel, e.g. caused
by stirrers or intense chemical reactions, can
seriously interfere with the measurement. A
surge or bypass tube (see illustration) of
sufficient size always allows, provided that
the product causes no buildup in the tube, a
reliable measurement even with strong turbu-
lence in the vessel.
Products that cause only light buildup can be
measured by using a tube with 100 mm nomi-
nal width or more. Light buildup in a tube of
this size is no problem.
Inflowing material
Do not mount the instrument in or above the
filling stream. Ensure that you detect the
product surface and not the inflowing mate-
rial.
Correct Wrong
Correct Wrong
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Buildup
If the sensor is mounted too close to the
vessel wall, buildup and deposits from the
measured product on the vessel wall cause
false echoes. Position the sensor at a suffi-
cient distance from the vessel wall. Please
also note chapter "4.1 General installation
instructions“.