1
2
F
ig
.
3
:
M
inimum distance to the max
.
level
1
D
ead band
2
R
eference plane
I
nformation
:
I
f the medium reaches the transducer
,
buildup can form on it and
cause faulty measurements later on
.
1
3
2
100%
0%
F
ig
.
4
:
M
easuring range
(
operating range
)
and max
.
measuring distance
1
full
2
empty
(
max
.
measuring distance
)
3
M
easuring range
G
auge pressure in the vessel does not in
fl
uence
VEGASON
61
.
L
ow
pressure or vacuum does
,
however
,
damp the ultrasonic pulses
.
T
his
in
fl
uences 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
.
P
ressure
/
V
acuum
12
VEGASON
61
•
4
…
20
m
A
/
HART
four
-
wire
4
M
ounting
28778
-
EN
-
081127
