VEGA VEGAPULS 43 Profibus PA - Manual (Page 27)

VEGAPULS 43 – Profibus PA 27
Pipe antenna: The surge pipe open to the bottom
must have a ventilation or equalisation hole at the
upper end
Correct Incorrect
VEGAPULS on the surge pipe: The sensor type plate
must be aligned with the rows of holes
Type label
Correct Incorrect
Mounting and installation
In many cases, VEGAPULS 54 radar sensors
with 5.8 GHz operating frequency achieve
considerably better and more reliable meas-
uring results in foam applications than series
40 sensors with 26 GHz technology.
Standpipe installation mistakes
Pipe antenna without ventilation hole
Pipe antenna systems must be provided with
a ventilation hole on the upper end of the
surge pipe. If this hole is absent, incorrect
measurements will result.
Wrong polarisation direction
When measuring in a surge pipe, especially if
there are holes or slots for mixing in the tube,
it is important that the radar sensor is aligned
with the rows of holes.
The two rows of holes (displaced by 180°) of
the measuring tube must be in the same
plane as the polarisation direction of the
radar signals. The polarisation direction is
always in the same plane as the type label.