VEGA Conductive electrodes - Manual (Page 27)

Conductive measuring system 27
Set-up
4 Set-up
4.1 VEGATOR 256C
Indicating and adjustment elements
Potentiometer
The switch point or the adaption to the
product conductivity can be adjusted via a
potentiometer. Use a small screwdriver to
carry out the adjustments on the
potentiometer.
Yellow control lamp
lights when the relay is energized,
extinguishes when the relay is deenergized.
Switch point adjustment
Level detection
- Connect the signal conditioning instrument
- Turn the potentiometer anticlockwise up to
complete left position
- Fill the vessel until the max. electrode is
covered by approx. 1 cm
- Turn the potentiometer slowly clockwise
until the yellow LED lights
The switching conductivity of the signal
conditioning instrument is adapted to the
product conductivity.
Pump control (Min-Max-control)
Pre-requirements
- First of all connect only the mass and max.
electrode to the signal conditioning
instrument terminal 2 and 3
- Connect the signal conditioning instrument
to the power supply
Adjust switch point
- Turn the potentiometer anticlockwise up to
complete left position
- Fill the vessel until the max. electrode is
covered by approx. 1 cm
- Turn the potentiometer slowly clockwise
until the yellow LED lights
- Now connect the min. electrode to terminal
1 of the signal conditioning instrument
The switching sensitivity of the signal
conditioning instrument is adapted to the
product conductivity, i.e. the relay of the
output deenergizes at max. level and the
yellow LED extinguishes.
This condition remains until the level
decreases the position of the min. electrode,
i.e. the relay of the output energizes at min.
level and the yellow LED lights.
The relay of the output energizes again at
max. level etc.
LED relay output
0 10
8
7
6
5
4
N
L1
3
2
1
max.
min.
R
200...250V
AC
3V
A
Relais: max 250V,5A,750VA pow
er supply
Potentiometer for switch point
adjustment