Grounding And Potential Equalising - Elis FLONET FH30 Series Project Design, Installation And Service Manual

ELIS PLZEŇ a. s.
5.7

Grounding and potential equalising

To guarantee correct operation of the FH30xx electromagnetic flowmeter, it is necessary to ensure that
the potential of the measured fluid before and after the flowmeter, the reference meter potential and the
PE protection conductor be equalised with the ground potential at the meter installation site. For the
equipment grounding and potential equalising, use Cu conductor of cross-section 4mm
The external PE terminal on the transmitter box shall be internally connected to the reference
meter potential.
Electrically conductive piping
Flanges on the conductive piping shall be connected to the PE terminals on the sensor and transmitter
housings and to the ground potential.
The bolted connections between the piping and sensor flanges cannot be taken for a
reliable and satisfactory conductive connection. It is recommended to provide threaded
holes on the flanges for a reliable bolted connection of the grounding/equalising conductor.
It is not recommended to place the grounding or equalising conductors under the heads of the
main flange bolts; such connection may be subject to corrosion and adversely affect the
measurement accuracy .
ELIS PLZEŇ a. s., Luční 425/15, 301 00 Plzeň, Czech Republic, phone.: +420 377 517 711, fax: +420 377 517 722 Es 90678K
Project design, installation and service manual
Electromagnetic flowmeter FLONET FH30xx
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