VEGA VEGAPULS 43 4 … 20 mA; HART compact sensor - Manual (Page 21)

VEGAPULS 43 – 4 … 20 mA 21
26626-EN-041227
Vessel installations
Vessel installations, such as e.g. ladders,
often cause false echoes. Make sure when
planning your measuring location that the
radar signals have free access to the meas-
ured product.
Vessel installations
Correct Incorrect
Ladder
Ladder
Struts
Struts, like other vessel installations, can
cause strong false echoes that are superim-
posed on the useful echoes. Small baffles
effectively prevent a direct false echo recep-
tion. These false echoes are scattered and
diffused in the surrounding space and are
then filtered out as "echo noise“ by the meas-
uring electronics.
Struts
Correct Incorrect
Shields
3.4 False echoes
The radar sensor must be installed at a loca-
tion where no installations or inflowing material
cross the radar impulses. The following ex-
amples and instructions show the most fre-
quent measuring problems and how to avoid
them.
Vessel protrusions
Vessel forms with flat protrusions can make
measurement very difficult due to their strong
false echoes. Baffles mounted above these
flat protrusions scatter the false echoes and
guarantee a reliable measurement.
Intake pipes, i.e. for the mixing of materials -
with a flat surface directed towards the sen-
sor - should be covered with an angled baffle
that scatters false echoes.
Vessel protrusions (ledge)
Vessel protrusions (intake pipe)
Correct Incorrect
Correct Incorrect
Mounting and installation