Yokogawa ADMAG AXW - Manual (Page 12)

<3. INSTALLATION>
3-3
IM 01E25D11-01EN
• Mounting orientation
IMPORTANT
If electrodes are perpendicular to the ground, air
bubbles near the top or precipitates at the bottom
may cause measurement errors. Ensure that the
terminal box of a remote flowtube is mounted
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
3.2 Handling Precautions
WARNING
The magnetic flowmeter is a heavy instrument.
Be careful that no damage is caused to
personnel through accidentally dropping it, or
by exerting excessive force on the magnetic
flowmeter. When moving the magnetic
flowmeter, always use a trolley, forklift, or crane
and have at least two people carry it.
3.2.1 General Precautions
(1) Precaution during Transportation
The magnetic flowmeter is packed tightly. When
it is unpacked, pay attention to prevent damaging
the flowmeter. To prevent accidents while it is being
transported to the installing location, transport it to
the site in its original packing.
CAUTION
When lifting the flowtube, use the lifting rings
(eye bolts or eye plates) as in Figure 3.2.1.
Never lift it using a bar passed through the
flowtube as this damages the liner severely.
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90 degrees or less
90 degrees or less
Eye bolt Eye plate
Figure 3.2.1 Lifting Flowtube
(2) Avoiding Shocks from Impact
CAUTION
Care should be taken not to drop the flowmeter
or expose it to excessive shock. In particular, be
careful not to subject the flange surface to shock.
This may lead to liner damage which will result in
inaccurate readings.
(3) Flange Protection Covers
IMPORTANT
Keep the protective covering (i.e. the corrugated
cardboard or other cushioning material) in place
over the flange except when mounting the
flowmeter to the pipe.
(4) Terminal Box Cover
IMPORTANT
As it is possible that the insulation will
deteriorate, do not remove the wrapping of the
terminal box nor open the terminal box cover
until it is time to wire it.
(5) Long-term Non-use
IMPORTANT
It is not desirable to leave the flowmeter unused
for a long term after installation. If this situation
is unavoidable, take care of the flowmeter by
observing the following.