M
ake sure that a min
.
distance
-
the so called dead
zone
-
below the reference plane is maintained in
which a measurement is not possible
.
T
he exact
value of the dead zone is stated in chapter
"
T
echnical data
"
in the
"
S
upplement
"
.
1
3
2
100%
0%
F
ig
.
18
:
M
easuring range
(
operating range
)
and max
.
measuring
distance
1
D
ead zone
(
min
.
measuring distance
)
2
D
ead zone
(
max
.
measuring distance
)
3
M
easuring range
4
R
eference plane
P
ressure
/
V
acuum
G
auge pressure in the vessel does not in
fl
uence
VEGASON S
61
.
L
ow pressure or vacuum does
,
however
,
damp the ultrasonic pulses
.
T
his in
fl
u
-
ences the measuring result
,
particularly if the level
is very low
.
W
ith pressures under
-
0
.
2
bar
(-
20
k
P
a
)
you should use a di
ff
erent measuring principle
,
e
.
g
.
radar or guided microwave
.
3
.
2
M
ounting instructions
S
crewing in
S
crew
VEGASON S
61
into the mounting socket
with an appropriate spanner applied to the hexagon
of the process
fi
tting
.
M
ax
.
torque see chapter
"
T
echnical data
"
.
W
arning
:
T
he housing of the threaded versions must
not be used to screw the instrument in
!
A
pplying tightening force on the housing
can damage its rotational mechanical parts
.
I
nstallation position
W
hen mounting
VEGASON S
61
,
keep a distance
of at least
200
mm
(
7
.
874
in
)
to the vessel wall
.
I
f
the sensor is installed in the center of dished or
round vessel tops
,
multiple echoes can arise
.
T
hese can
,
however
,
be suppressed by an
appropriate adjustment
(
see
"
S
etup
"
).
I
f you cannot maintain this distance
,
you should
carry out a false signal suppression during setup
.
1
2
> 200 mm
F
ig
.
19
:
M
ounting on round vessel tops
1
R
eference plane
2
V
essel center or symmetry axis
I
n vessels with conical bottom it can be advanta
-
geous to mount the sensor in the center of the
vessel
,
as measurement is then possible down to
the lowest point of the vessel bottom
.
F
ig
.
20
:
V
essel with conical bottom
VEGASON S
61
25
M
ount
32944
-
02
-
070301
