Emerson Process Management ControlWave EFM 3808 - Manual (Page 276)

S1400CW Page 3-8 Section 3 - Grounding & Isolation
grounded to the pipeline. If any pressure transmitters or pulse transducers are remotely
mounted, connect their chassis grounds to the pipeline or earth ground.
Figure 3-8 - ControlWave EFM (Installation is similar to GFC/XFC)
Remote Installation without Cathodic Protection
3.4.2 Meter Runs With Cathodic Protection
Dielectric isolators are available from Bristol Babcock and are always recommended as an
added measure in isolating the ControlWave EFM/GFC/XFC from the pipeline even
though the ControlWave EFM/GFC/XFC does provide 500V galvanic isolation from the
pipeline and should not be affected by cathodic protection or other EMF on the pipeline.
ControlWave EFM/GFC/XFC may be mounted directly on the pipeline (see Figure 3-9) or
remotely on a vertical stand-alone two-inch stand-pipe (see Figure 3-10). It is recommended
that isolation fitting always be used in remotely mounted meter systems. An isolation
fittings or gasket should be installed between the following connections: