Vega VEGATOR 631 Ex Operating Instructions Manual page 21

Fault signal adjustment,
bridge
VEGATOR 631 Ex • Signal conditioning instrument
To implement line monitoring, you have to mount a resistor of 220 kΩ
between terminals 1 and 2 in the connection housing of the probe. This
means that with single point control, the measuring and ground
electrode are monitored and with two-point control, the max. and
ground electrode.
When a fault message is generated, the switching output is
simultaneously activated.
1
2
2
1
1 3
Fig. 12: Measuring system with line monitoring
Resistor (220 kΩ)
1
If a fault message is not wanted, a bridge must be provided on the
signal conditioning instrument instead of the resistor in the connection
housing of the probe.
Note:
The line monitoring and the fault signal are inactive with this bridge.
2
2
1
1 3
Fig. 13: Measuring system without line monitoring
1 Bridge between terminal 3 and 4
If a measuring system is used as part of an overfill protection system,
the bridge on the signal conditioning instrument must not be closed.
With Ex probes, the resistor in the probe housing is already present.
3
3
6 Set up
1 2 3 4
1
1 2 3 4
21