<3. Installation>
11
IM 01E25A01-01EN
(8) Supporting the Flowmeter
CAUTION
Do not secure the flowmeter separately to prevent the
vibrations, shocks, and expansion and contraction forces
of the piping from affecting it. Fix the pipes first, then
support the flowmeter with the pipes.
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Abutment
Abutment
Magnetic flowmeter
To release the load from installing the flowmeter to the
pipeline, set a expansive pipe in the downstream side.
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Abutment
Abutment
Expansive pipe
Magnetic flowmeter
For vertical mounting, make sure that the weight of piping
does not weigh on the flowmeter.
(9) Mounting Positions
Pipes must be fully filled with liquids.
IMPORTANT
It is essential that pipes remain fully filled at all times,
otherwise flow rate indications may be affected and
measurement errors may be caused.
Piping shall be designed so as to maintain the interior of
the sensor filled with fluids.
Vertical mounting is effective in such cases as
when fluids tend to separate or solid matter may be
precipitated. When employing vertical mounting, direct
the fluids from the bottom to the top to ensure that the
pipes remain fully filled.
h
h>0
h>0
h
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(Incorrect)
(Correct)
(Incorrect)
(Correct)
Figure 3.1.4 Mounting Positions
Avoid air bubbles.
IMPORTANT
If air bubbles enter a measurement pipe, flow rate
indications may be affected and measurement errors
may be caused.
In cases where fluids contain air bubbles, piping must
be designed to prevent them from accumulating in the
measurement pipe of a sensor.
If a valve exists near the flowmeter, try to mount the
flowmeter on the valve’s upstream side in order to
prevent a possible reduction of pressure inside the pipe,
thereby avoiding the possibility of air bubbles.
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Valve
(Incorrect)
(Correct)
(Incorrect)
(Correct)
Figure 3.1.5 Avoiding Air Bubbles
Mounting orientation
IMPORTANT
Install the magnetic flowmeter so that the electrodes
position is not perpendicular to the ground. Otherwise it
may cause the measuring errors because air bubbles at
upper side or slurry at downside covers the electrode.
Mount the terminal box of a remote sensor and the
transmitter of an integral flowmeter above the piping to
prevent water from entering them.
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Correct
Incorrect
Electrode
Air bubble
Precipitate
Electrode
Incorrect
Water can
seep into
the terminal
box.
Figure 3.1.6 Mounting Orientation
Installation
3
