T
ypical applications are over
fi
ll and dry run protection
.
T
hanks to its
simple and robust measuring system
,
LBV
310
is virtually una
ff
ected
by the chemical and physical properties of the bulk solid
.
I
t also works when subjected to strong external vibrations or changing
products
.
F
ault monitoring
T
he electronics module of
LBV
310
monitors continuously the
following criteria
:
l
C
orrect vibrating frequency
l
L
ine break to the piezo drive
I
f one of the stated malfunctions is detected or in case of power failure
,
the electronics takes on a de
fi
ned switching condition
,
i
.
e
.
the relay
deenergises
(
safe condition
).
T
he tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx
.
150
H
z
.
W
hen the tuning
fork is submerged in the product
,
the vibration amplitude changes
.
T
his change is detected by the integrated electronics module and
converted into a switching command
.
LBV
310
is a compact instrument
,
i
.
e
.
it can be operated without
external evaluation system
.
T
he integrated electronics evaluates the
level signal and outputs a switching signal
.
W
ith this switching signal
,
a
connected device can be operated directly
(
e
.
g
.
a warning system
,
a
PLC
,
a pump etc
.).
T
he data for power supply are speci
fi
ed in chapter
"
T
echnical data
"
.
3
.
3
O
peration
W
ith the factory setting
,
products with a density of
>
0
.
02
g
/
cm
³
(
0
.
0008
lbs
/
in
³
)
can be measured
.
T
he instrument can also be adapted
to products with lower density
>
0
.
008
g
/
cm
³
(
0
.
0003
lbs
/
in
³
).
O
n the electronics module you will
fi
nd the following indicating and
adjustment elements
:
l
S
ignal lamp for indication of the switching condition
(
green
/
red
)
l
P
otentiometer for adaptation to the product density
l
M
ode switch for selecting the switching condition
(
min
./
max
.)
3
.
4
S
torage and transport
Y
our instrument was protected by packaging during transport
.
I
ts
capacity to handle normal loads during transport is assured by a test
according to
DIN EN
24180
.
F
unctional principle
P
ower supply
P
ackaging
8
LBV
310
• -
R
elay
(
DPDT
)
3
P
roduct description
35919
-
EN
-
091126
