Yokogawa ADMAG CA - Manual (Page 14)

4.INSTALLATION
IM 1E8B0-01E
4-5
IMPORTANT
(13)Grounding
Improper grounding can have an adverse affect on the flow measurement.
Please ensure that the instrument is properly grounded.
The electromotive force of the magnetic flowmeter is minute and it is easy to be affected
by noise. And also that reference electric potential is the same as the measuring fluid
potential. Therefore, the reference electric potential (terminal potential) of the Flow Tube
and the Converter/Amplifier also need to be the same as the measuring fluid. And
moreover, that the potential must be the same with ground.
Please be sure to grounding according to Figure 4.1.7.
Earth ring
600 V vinyl insulated
electric cable
(2mm
2 or larger)
Grounding resistance: 100 Ω or less
(10
Ω
or less for TIIS(JIS) Flameproof type)
Note: See “4.4.1 Protective Grounding” for
information on protective grounding.
Figure 4.1.7 Gounding