Emerson Bristol ControlWave LP Manuál s instrukcemi stáhnout pdf (Strana 136)

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:

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Emerson Bristol ControlWave LP Manuál s instrukcemi Strana 136