Switch the controller to a measurement with
potential equalisation
NOTICE!
Wire jumper with connected potential
equalisation
A measurement with a wire jumper and
connected potential equalisation
delivers incorrect measured values.
Please note the following differ‐
ences:
In the factory the controller is pre-set
for measurements without potential
equalisation (unsymmetrical measure‐
ment).
In a measurement with potential equali‐
sation (symmetrical measurement), the
setting in the [Measurement] menu
must be changed accordingly.
With a symmetrical connection, remove
the wire jumper and connect the poten‐
tial equalisation conductor (PA) to the
terminal XE3_2 (channel 1) or XE7_2
(channel 2) of the controller.
1. In the
[Measurement ]
channel 1 or 2
menu, change the entry under
[Potential equalisation ]
to
[Yes]
.
2.
Open the controller and remove the wire
jumper.
n Terminal XE3_1, XE3_2 for channel
1.
n Terminal XE7_1, XE7_2 for channel
2.
Sensor connection without potential equalisa‐
tion
The sensor is connected to the controller, as
marked in the terminal diagram. Do not remove
the wire jumper in the controller.
Sensor connection with potential equalisation
NOTICE!
Error sources when measuring with
potential equalisation
A measurement without a wire jumper
and/or unconnected potential equalisa‐
tion delivers incorrect measured values.
With a symmetrical connection, connect
the line for potential equalisation to ter‐
minal XE3_2 (channel 1) or XE7_2
(channel 2) of the controller. Before‐
hand, remove the respective wire
jumper at these terminals.
The potential equalisation must always
be in contact with the measurement
medium. A special potential equalisa‐
tion plug (Order No. 791663) and a
cable (Order No. 818438) are neces‐
sary with the DGMa bypass fitting. The
potential equalisation pin is always
fitted with the DLG bypass fitting, only
the cable (Order No. 818438) is
needed.
Assembly and installation
61
To Next Page
Loading...
Need help?
General
