VEGA VEGASON 51P…53P Profibus PA - Manual (Page 31)

VEGASON 51P … 53P 31
Mounting and installation
Strong turbulence
Buildup
Inflowing material
Min. distance
high water
Low water
Shield
60°
Filtering out of a ledge echo
The expected max. high water determines
the installation height, to ensure the min.
distance of the transducer even with the
highest water level. The low water basin
ledges should be covered with a shield in the
transducer area to filter out echoes from
exposed basin surfaces.
Do not mount the instrument in or above the
filling stream. Ensure that you detect the
product surface and not the inflowing mate-
rial.
If the sensor is mounted too close to the
vessel wall, buildup and adhesions of the
measured product to the vessel wall can
cause false echoes. Position the sensor at a
sufficient distance from the vessel wall.
Please also note chapter "4.1 General instal-
lation instructions“.
Strong turbulence in the vessel, e.g. by pow-
erful stirrers or intense chemical reactions,
seriously interfere with the measurement. A
surge or bypass tube (illustration) of suffi-
cient size always allows, provided the prod-
uct causes no buildup in the tube, a reliable
measurement even with strong turbulence in
the vessel.