VEGA VEGATOR 521, 522, 523, 527 - Manual (Page 14)

14 VEGATOR
4.3 Switching point adjustment
The following control modes are possible with
the individual instruments:
- level detection [521, 522, 523, 527]
- double point control with one sensor and
adjustable hysteresis (min./max. control)
[522]
- single point control with one sensor and 2
level switches [523]
- two single point controls with 2 sensors
[527]
- double point control with 2 sensors [527]
Note
In general, the relay control lamp shows the
activated (energised) condition of the relay. A
dark control lamp means that the relay is
deenergised. This means also that in case of
power failure the relay always returns to
deenergised condition.
VEGATOR 521
Single point control
Please note for single point control also "4.1
Indicating and adjustment elements" (the
numbers in brackets refer to the illustration).
Setup
VEGATOR 523
Signal conditioning instrument as level switch
for a sensor with dual single point control.
The instrument has two potentiometers.
Therefore it is possible to achieve with one
sensor, e.g. an overfill protection and a dry
run protection or an overfill protection with
pre- or main alarm. The two points that can
be adjusted have a fixed hysteresis.
VEGATOR 527
Signal conditioning instrument as level switch
for single point control with two sensors or
double point control with two sensors (see
illustration 18). With VEGATOR 527, two
sensors can be monitored at the same time
with one signal conditioning instrument. The
two points that can be adjusted have a fixed
hysteresis.
off1
1
1 2
2
on1
on2 off2
off1
1
2
on1
off2 on2 on2