I
n exceptions
,
e
.
g
.
in pipelines or if the probe is mounted very
close to the vessel wall
,
it can happen ath the probe signals
already over
fi
lling
(
covering
)
in uncovered condition
.
I
n this case
,
the switching point must be re
-
adjusted
.
F
or adjustment
,
the vessel must not be
fi
lled and the switching
point adjustment is also possible in dismounted condition
.
A
fresh adjustment is necessary in the following cases
:
l
for probes with a length of more than
3
m
(
9
.
8
ft
)
l
in narrow space installation conditions with high standing
capacitance
(
e
.
g
.
in tubes etc
.)
l
after exchange of the oscillator
P
roceed as follows for a fresh adjustment
:
1
M
ake sure that the probe is uncovered
.
2
P
ierce the cover of the potentiometer
(
6
)
with a screw
-
driver
.
3
T
urn the below potentiometer
(
6
)
fi
rst of all anticlockwise
(
max
.
20
turns
)
until the control lamp signals
"
covered
"
.
M
ode
A
(
over
fi
ll protection
)
=
control lamp lights
M
ode
B
(
dry run protection
)
=
control lamp extinguishes
I
f this condition is already reached
,
you can continue with
the next step
.
4
T
urn the potentiometer
(
6
)
very slowly
(
due to the damping
)
clockwise until the control lamp signals
"
uncovered
"
.
M
ode
A
(
over
fi
ll protection
)
=
control lamp extinguishes
M
ode
B
(
dry run protection
)
=
control lamp lights
5
T
urn the potentiometer
(
6
)
clockwise according to the
following chart
.
6
T
he probe is now ready for operation
.
S
ensitivity
S
tandard
very sensitive
additional turns
DK
value
>
2
=
2
turns
DK
value
>
1
.
5
=
1
turn
T
ab
.
1
:
N
umber of additional turns for the potentiometer
(
6
)
N
ote
:
W
ith the measurement of products with very low dielectric
values
,
the number of turns can be reduced up to
1
according
to the chart
.
E
xceptions
F
resh adjustment
18
VEGACAP
27
- -
double relay
(
DPDT
)
S
et up
33758
-
EN
-
070809
Summary of Contents for VEGACAP 27
Page 1: ...Operating Instructions VEGACAP 27 double relay DPDT Capacitive ...
Page 13: ...Fig 4 Inflowing medium VEGACAP 27 double relay DPDT 13 Mounting 33758 EN 070809 ...
Page 34: ...Supplement 34 VEGACAP 27 double relay DPDT 33758 EN 070809 ...
Page 35: ...Supplement VEGACAP 27 double relay DPDT 35 33758 EN 070809 ...