YOKOGAWA AXFA14C User Manual

<3. Installation>
9
IM 01E20A01-01EN
(5) Long-term Non-use
IMPORTANT
Itisnotdesirabletoleavetheowmeterunused
for a long term after installation. If this situation is
unavoidable,takecareoftheowmeterbyobserving
the following.
 Conrmationofsealingconditionsfor
theowmeter
Conrm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owmeter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owmeterperform
supplementary inspections.
3.2.2 Flowmeter Piping
CAUTION
Misaligned or slanted piping can lead to leakage and
damagetotheanges.
(1) Correct any misaligned or slanted piping, and any
gapsthatmayexistbetweenmountingangesbefore
installingtheowmeter(refertoFigure3.2.2).
Slanted
Misaligned
F0308.ai
Figure 3.2.2 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ushingthepiping
beforemountingtheowmeter.Thispreventsthe
lining from being damaged, as well as the occurrence
of erroneous measured signals resulting from foreign
substancespassingthroughtheowtubeduring
measurement.
3.3 Installation of Integral
Flowmeter and Remote
Flowtube
IMPORTANT
Do not forget to insert gaskets from Yokogawa between
pipesandowmeter,whichshallbesuppliedwhenthe
owmeterhasceramicsliningwithnogroundingrings.
In case of grounding rings to be supplied and attached
later, these gaskets shall be inserted between
groundingringsandowmeter.
NOTE
• The tightening torque value to which gaskets must
be tightened varies depending on the type and
external dimensions of the lining and the gasket. In
this section, the tables indicating tightening torque
values include the corresponding gasket types.
The internal diameters of the gaskets are close to
those of the grounding rings (refer to Table 3.3.16).
• ForuidscapableofpotentiallypermeatingPFA
linings(suchasnitricacid,hydrouoricacid,or
sodium hydrate at high temperatures), different
tightening torque values must be applied. The
tables of these torque values is indicated in this
section.
• For replacement models for the earlier ADMAG
or ADMAG AE, the tightening torque values in the
tables can be applied if their process connections,
the lining types, and the nominal sizes are the same.
3.3.1 Nominal Diameter 2.5 mm (0.1 in.) to
10 mm (0.4 in.), Union Joint Type
Ceramics linings with diameters of 2.5 mm (0.1 in.), 5 mm
(0.2 in.), or 10 mm (0.4 in.) are connected using union
joints.WeldorscrewtheconnectingttingsinTable3.3.1
ontothepiping.Theexternaldimensionsofthettings
are shown in the table.
Installation
3

YOKOGAWA AXFA14C Specifications

General

Brand	YOKOGAWA
Model	AXFA14C
Category	Measuring Instruments
Language	English