METER GASKETS AND GROUNDING
Gaskets and grounding are required for proper meter installation .
IMPORTANT
If you received grounding rings with your meter, install them. Electromagnetic meters require a good ground for proper operation.
Grounding rings also help protect the edge of the liner from debris that may flow from the pipe.
Meter/Pipeline Connection Gaskets
IMPORTANT
It is essential that the transmitter’s input ground (zero voltage reference) be electrically connected to the liquid media and to a good,
solid earth ground reference.
You must install gaskets (not provided) between the sensor's
isolating liner, grounding rings and the pipeline flange to provide a
proper and secure hydraulic seal . Use gaskets that are compatible
with the fluid . Center each gasket on the flange to avoid flow
restrictions or turbulence in the line .
During installation, do not use graphite or any electrically
conductive sealing compound to hold the gaskets . This could
compromise the accuracy of the measuring signal .
If you are using a grounding ring in the sensor/pipeline connection,
place the ring between two gaskets . See
with Grounding Rings” on page 16
for more instructions .
GASKETS RECOMMENDED
GROUNDING RING
GROUNDING RING
Figure 15: Meter/pipeline connection gaskets and grounding rings
Meter Grounding and Potential Equalization
In order to obtain an accurate measurement, sensor and fluid need to be on the same electric potential .
Process pipeline material can be either electrically conductive (metal) or not electrically conductive (made of or lined with
PVC, fiberglass or concrete) .
If flange or intermediate flange versions with additional grounding electrode are used, grounding is provided by the
connected pipeline .
IN CASE OF A TYPE WITH FLANGE, USE A CONNECTION CABLE (MINIMUM 4 MM²) BETWEEN GROUNDING SCREW
ON THE METER FLANGE TO THE COUNTERFLANGE IN ADDITION TO THE FIXING SCREWS. VERIFY THAT A PERFECT
ELECTRIC CONNECTION IS PROVIDED.
COLOR OR CORROSION ON THE COUNTERFLANGE MAY HAVE A NEGATIVE EFFECT ON THE ELECTRIC CONNECTION.
IN CASE OF TYPES WITH INTERMEDIATE FLANGES, THE ELECTRIC CONNECTION TO THE SENSOR IS DONE VIA TWO 1/4
AMP PLUGS INSTALLED ON SENSOR’S NECK.
Meter Gaskets and Grounding
Page 15
March 2022
MAG-UM-01272-EN-21
