VEGA VEGATOR 631 Ex - Manual (Page 23)

Mode B
Preferrably as dry run protection system.
1
2 3
Fig. 15: Mode B - Dry run protection
Means with covered max. electrode:
l Relay energises, connection 12 - 14 is connected through relay
l Transistor output is conductive
l Control lamp - Output lights
Means with uncovered max. electrode (level detection) or min.
electrode (two-point control):
l Relay deenergises, connection 12 - 13 is connected through relay
l Transistor output blocks
l Control lamp - Output extinguishes
6 .3 Switching point adjustment
Note:
Keep in mind for all switching point adjustments that, between the
momenet when the switching point is reached and the momenet when
the switching function is triggered, there is an integration time of
0.5 sec. The potentionmeter must therefore be turned slowly.
A possible additional integration time should only be switched on after
the adjustment.
In all following applications in conjunction with an integrated resistor of
220 kΩ, line monitoring of the ground and max. electrode is ensured.
l Set the mode selection switch to mode A
l Connect the signal conditioning instrument to power supply
l Turn the potentiometer to position 0
l Fill the vessel until the max. electrode is covered approx. 1 cm by
the product
l Turn the potentiometer slowly clockwise until the yellow signal
lamp extinguishes
Line monitoring
Level detection for max.
signal
VEGATOR 631 Ex • Signal conditioning instrument 23
6 Set up
23440
-EN
-090130