VEGA VEGASON 54V…56V - Manual (Page 35)

VEGASON 54V … 56V 35
Buildup
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 "4.2 General instal-
lation instructions“.
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.
Mounting and installation
Vessel installations
Vessel installations such as, for example, a
ladder, often cause false echoes. Make sure
when planning your measurement loop that
the ultrasonic signals have free access to the
measured product.
Vessel installations
Correct Wrong
Ladder
Ladder
Struts
Struts, like other vessel installations, can
cause strong false echoes that are superim-
posed over the useful echo signals. Small
shields effectively hinder a direct false echo
reflection. These false echoes are scattered
and diffused in the area and are then filtered
out as "echo noise“ by the measuring elec-
tronics.
Struts
Correct Wrong
Shields
Inflowing material
Correct Wrong
Correct Wrong