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(12) Grounding
IMPORTANT
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 flow tube 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 poten-
tial must be the same with ground.
Please be sure to ground according to Figure 3.1.7.
600 V vinyl insulated
electric cable
2
(2 mm
or larger)
Grounding resistance 100 Ω or less
(10 Ω or less for JIS flameproof type)
In case earth rings are used.
Note; See "3.4.1 Protective Grounding" for information on
protective grounding.
Figure 3.1.7
Grounding
Earth ring
In case earth rings are not used.
(Available only for metal piping)
F030107.EPS
3.2 Handling Precau-
tions
WARNING
The Magnetic Flow tube is a heavy instrument.
Please be careful to prevent persons from
injuring when it is handled.
3.2.1
General Precautions
(1) Precaution for Carrying
The Magnetic Flow Tube is packed tightly. When it is
unpacked, please give attention to prevent damages to
the flow tube. And to prevent the accident during carry
to the installing location, please carry it near the
location keeping packed as it delivered.
CAUTION
In case the Magnetic Flow Tube lifts up, please
refer to Figure 3.2.1. Please never lift up by
using a bar through the flow tube. It damages
liner severely.
Horizontal Lifting
Figure 3.2.1
Lifting Flow Tubes
3-3
3. INSTALLATION
Vertical Lifting Sling
Rigging Method
F030201.EPS
IM 1E6D0-01E
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