Flowmeter Piping - YOKOGAWA ADMAG AXR User Manual

(4) Terminal Box Cover
IMPORTANT
As it is possible that the insulation will
deteriorate, do not 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.
• Confirmation of sealing conditions for the
flowmeter
Confirm that the terminal box screw and wiring ports
are well sealed. Equip the conduit piping with drain
plugs or waterproof glands to prevent moisture or
water from penetrating into the flowmeter through
the conduit.
• Regular inspections
Inspect the sealing conditions as mentioned above,
and the inside of the terminal box at least once a
year. Also, due to rain, etc. when it is suspected
that water may have penetrated into the inside
flowmeter perform supplementary inspections.
<3. INSTALLATION>

3.2.2 Flowmeter Piping

CAUTION
Misaligned or slanted piping can lead to leakage
and damage to the flanges.
(1) Correct any misaligned or slanted piping, and
any gaps that may exist between mounting
flanges before installing the flowmeter (Read
Figure 3.2.1).
Slanted
Figure 3.2.1 Slanted and Misaligned Flowmeter
Piping
(2) Inside a newly installed pipeline, there may
be some foreign substances such as residue
from welding or wood chips. Remove them
by flushing the piping before mounting the
flowmeter. This prevents the lining from
being damaged, as well as the occurrence
of erroneous measured signals resulting
from foreign substances passing through the
flowtube during measurement.
3-4
Misaligned
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