2 principle of operation, Vegator 521, Vegator 522 – VEGA VEGATOR 521, 522, 523, 527 User Manual
Page 13
VEGATOR
13
4.2 Principle of operation
The following illustrations show mode A (max.
detection, overfill protection).
VEGATOR 521
Signal conditioning instrument as level switch
for a sensor with single point control. A horn
can be activated, if e.g. a certain level is
exceeded. If the level falls below the set
value, the horn is switched off. A typical
application for this level switch is an overfill
protection or dry run protection with one
sensor. The point that can be adjusted has a
fixed hysteresis.
VEGATOR 522
Signal conditioning instrument as level switch
for one sensor with double point control
(adjustable hysteresis). The instrument has
two potentiometers. Both points, the switch
on and off point can be adjusted
independently. This ensures that, e.g. a filling
or emptying pump or a valve control can be
achieved.
With the switches 4, 5 and 6 the integration
time can be adjusted respectively. The times
of the activated time switches sum up, see
illustration 10. When the switch on and off
delay are switched on together, the set time
is valid for both delay modes.
Switch
1
2
3
4
5
6
Time
0.2 s
A/B
0
0
0
0
0
0.5 s
A/B
0
0
0
2 s
A/B
12
0
0
6 s
A/B
0
6
0
8 s
A/B
2
6
0
12 s
A/B
0
0
12
14 s
A/B
2
0
12
18 s
A/B
0
6
12
20 s
A/B
2
6
12
Changeover switch for variable fail-
safe adjustment
(only on VEGATOR 522, VEGATOR 522 Ex)
The switch for the variable fail-safe
adjustment (13) is located on the circuit
board of VEGATOR 522. For detection of a
measured value reduction due to failure, e.g.
break of the probe or damage of the
electrode, this function can be activated.
With separate sensor housing, a full signal or
failure information is triggered, if the
connection cable is broken.
As soon as the actual value falls below a
previously adjusted measured value, a fault
signal is triggered. By this means, a single
point control with safety monitoring can be
achieved (see "4.3 Switch point adjustment
VEGATOR 522").
Either set switch 2 or switch
3 to "-".
The times are valid for the
adjusted delay mode.
Setup
off
on
off
off
on