Hauser Maulburg
KA565F/00/a2/05.02
Exchange of a parabolic antenna
for FMR 533
/ flange
Alignment of an installed instrument according to the electrical field
The beam pattern always consists of an electrical and a magnetical field, oriented to each other with a 90° offset.
The alignment marker on the threaded connection or flange marks the virtual horizontal extension of the antenna coupling, thus the polarization of the electrical field
in the beam pattern.
The measurement can be optimized by rotating the threaded boss or flange (and therefore the electromagnetic fields). For this purpose, the echo signal in the
envelope curve has to be maximized (envelope curve display on display unit in operating matrix field 09C).
The figures show the installation specific alignments. The planar antenna FMR 532 does not have to be aligned.
These alignments are optimum based on general experience. However, under certain circumstances another
alignment can be better.
Alignment in bypass:
marker point is offset to T’s
by 90° (also applies
to horn antenna)
90°
tank
bypass
Alignment in
stilling well:
marker points
toward slots
tank
stilling well
90°
EN
DR
ESS
+H
AU
SE
R
MIC
RO
PIL
OT II
HA
USER
MICR
OPILO
T II
IP 65
IP 65
Ord
er C
ode
:
Ser.-
No.:
Order
Cod
e:
Ser
.-No.
:
Mes
sbe
reich
Mea
surin
g ra
nge
Messbereich
Me
asur
ing r
ang
e
U 16
...36
V D
C
4...2
0 m
A
U 16.
..36
V DC
4...20 mA
max
. 20
m
max.
20 m
Made in Ger
m
an
y Maulb
u
rg
Made in Ger
m
an
y Maulb
u
rg
T
>70
°C :
A
t >8
5°C
T
>70°C :
A
t >
85°C
Alignment in tank:
marker oriented
towards
tank wall
An imprinted alignment marker can be found on the flange
surface (FMR 530/531) or on the neck (FMR 533)
II
A microwave measurement can be negatively influenced by the electrical field
being non-homogenious, non-symmetrical or subject to interference reflections etc.
The sketch shows how the indicated field can be oriented differently by
turning the instrument and the antenna.
This allows an optimization of the received signal.
ideal
not optim
um
23°
