VEGA Conductive electrodes - Manual (Page 30)

30 Conductive measuring system
Set-up VEGATOR 532 Ex
Switch point adjustment
Double single point control
Min.-/Max.-signal separately
Pre-requirements
- Coordinate channel 1 to the max.-signal
- Coordinate channel 2 to the min.-signal
- Set the selection switch of channel 1 (16) to
mode A
- Set the selection switch of channel 2 (17) to
mode B
- Connect the signal conditioning instrument
to power supply
- Turn the potentiometer (5) to position 0
Switch point max.-signal
- Fill the vessel until the max. electrode is
covered by approx. 1 cm
- Turn the potentiometer (5) slowly clockwise
until the yellow LED of channel 1
extinguishes.
The max. electrode is now adapted to the
product conductivity, i.e. the relay of output 1
deenergizes at max. level and the transistor
of output 1 blocks.
Switch point min.-signal
- Turn the potentiometer (8) to position 10
- Empty the vessel until the min. electrode is
covered by approx. 1 cm
- Turn the potentiometer (8) slowly
anticlockwise until the yellow LED of
channel 2 extinguishes.
The min. electrode is now adapted to the
product conductivity, i.e. the relay of output 2
deenergizes at min. level and the transistor of
output 2 blocks.
Pump control, mode A
Overflow protection (channel 1)
Pre-requirements
- First of all connect only the mass and the
max. electrodes to the signal conditioning
instrument (connection points d28 and
d30)
- Set the selection switch of channel 1 (16) to
mode A
- Connect the signal conditioning instrument
to power supply
- Turn the potentiometer (5) to position 0
Adjust switch point
- Fill the vessel until the max. electrode is
covered by approx. 1 cm
- Turn the potentiometer (5) slowly clockwise
until the yellow LED of channel 1
extinguishes
- Now connect the min. electrode to
connection point d32 of the signal
conditioning instrument
The pump control is adapted to the product
conductivity, i.e. the relay of output 1
deenergizes at max. level and the transistor
of output 1 blocks.
This switching condition remains until the level
decreases the position of the min. electrode,
i.e. the relay of output 1 energizes at min.
level and the transistor of output 1 is
conductive.
Only at max. level, the relay of output 1
deenergizes again and the transistor of
output 1 blocks.