Badger Meter M-Series M1000 - Manual (Page 13)

METER GASKETS AND GROUNDING
Gasket and grounding requirements must be considered when determining the meter location, orientation and application .
Meter/Pipeline Connection Gaskets
You must install gaskets (not provided) between the detector's isolating liner
and the pipeline flange to ensure 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 detector/pipeline connection, place the
ring between two gaskets . (See "Pipelines with Cathodic Protection" on page 13 .)
GASKETS RECOMMENDED
Figure 15: Meter/pipeline connection gaskets
Meter Grounding
Process pipeline material can be either electrically conductive (metal) or not electrically conductive (made of or lined with
PVC, fiberglass or concrete) .
It is essential that the mag meter amplifier’s input ground (zero voltage reference) be electrically connected to the liquid media and
to a good, solid earth ground reference.
Conductive Pipe Grounding
To achieve an adequate ground, the meter body MUST be electrically connected to the liquid media . The mag meter flanges
are provided with grounding bolts for this purpose .
If the pipe material is electrically conductive, simply install grounding straps between these grounding bolts and the
mating flanges .
To ensure a good electrical connection at the mating flanges, we recommend that you drill and tap the flanges and install a
grounding screw (not provided) .
These grounding straps must be copper wire, at least 12 AWG size . They must be connected on both sides (inlet and outlet) of
the detector and to a local, earth ground .
Pipelines with Cathodic Protection
As for pipelines with cathodic protection, install meter potential-free . 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).
Observe national rules for potential-free installations .
6 mm² Cu
"X"
M4:1 "X"
Electrically isolated Electrically isolated
Figure 16: Cathodic protection
Meter gaskets and grounding
Page 13 July 2014 MAG-UM-00379-EN-02