Endress+Hauser Proline Promag 51, Operating Instructions Manual

Page: 47 / 124

Proline Promag 51 4 Wiring
Hauser 47
4.3 Potential equalisation
4.3.1 Standard case
Perfect measurement is only ensured when the medium and the sensor have the same electrical
potential. Most Promag sensors have a standard installed reference electrode which guarantees the
required connection. This usually means that no ground disks or additional potential matching
measures are necessary.
!
Note!
For installation in grounded metal pipes, it is advisable to connect the ground terminal of the trans-
mitter housing to the piping. Also, observe company-internal grounding guidelines.
F06-5xxxxxxx-04-xx-xx-xx-002
Fig. 34: Potential equalisation by means of the transmitter's ground terminal
"
Caution!
For sensors without reference electrodes or without metal process terminals, carry out potential
equalisation as per the instructions for special cases described below. These special measures are
particularly important when standard grounding practice cannot be ensured or extremely strong
equalising
currents are expected.