Pipelines with Cathodic Protection
For pipelines with cathodic protection, install the meter with potential-free contacts. No electric connection from the meter to
the pipeline system may exist and power supply is to be provided via isolating transformer.
USE GROUNDING ELECTRODES GROUNDING RINGS ALSO NEED TO BE INSTALLED ISOLATED FROM THE
PIPELINE SYSTEM.
UTILISEZ LES ÉLECTRODES DE MISE À LA TERRE LES ANNEAUX DE MISE À LA TERRE DOIVENT ÊTRE INSTALLÉES À
PARTIR DU SYSTÈME DE CONDUITES.
Observe national rules for potential-free installations.
6 mm² Cu
"X"
M4:1
"X"
Electrically isolated
Electrically isolated
Figure 21: Cathodic protection
Non-Conductive Pipe Grounding
If the process pipe is not electrically conductive (PVC, fiberglass, cement-lined pipes or any other non-conductive material)
and the meter was not originally ordered with an optional grounding electrode, you must install a pair of grounding rings
between the mating flanges at both ends of the meter. See the following illustration.
In this case, the grounding straps should be connected to both of the
grounding rings and to a good, solid earth ground. Grounding rings
are available in stainless steel. If your fluid is too aggressive for stainless
steel, order a meter with the optional grounding electrode in a material
compatible with the fluid.
GASKETS RECOMMENDED
GROUNDING RING
GROUNDING RING
Figure 22: Non-conductive pipe grounding
ModMAG® M1000 Electromagnetic Flow Meter
Page 16 March 2020MAG-UM-00379-EN-07
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