<3. INSTALLATION>
3-2
IM 01E30D01-01EN
(5) Precautions for Use of Liquid Sealing
Compounds
IMPORTANT
Care must be taken in using liquid sealing
compounds on the piping, as it may have a
negativeinuenceontheowindicationsby
owingoutandcoveringthesurfacesofan
electrode or grounding ring. In particular, care
must be taken if a liquid sealing compound is
used in the case of vertical piping.
(6) Service Area
Select locations where there is adequate space to
service installing, wiring, overhauling, etc.
(7) Bypass Line
It is recommended to install a bypass line to facilitate
maintenance and zero adjustment.
Block valve
Figure 3.1.3 Bypass Line
(8) Supporting the Flowmeter
CAUTION
Donotsecuretheowmeterseparatelyto
prevent the vibrations, shocks, and expansion
and contraction forces of the piping from
affectingit.Fixthepipesrst,thensupportthe
owmeterwiththepipes.
(9) Mounting Positions
• Pipesmustbefullylledwithliquids.
IMPORTANT
Ifthepipeisempty,theoutputuctuatesorthe
ProcessAlarm(SignalOverow)occurs.The
pipemustbefullylledwithliquid.
Piping shall be designed so as to maintain the
interioroftheowtubelledwithuids.
Vertical mounting is effective in such cases as
whenuidstendtoseparateorsolidmattermaybe
precipitated. When employing vertical mounting,
directtheuidsfromthebottomtothetoptoensure
thatthepipesremainfullylled.
(Correct)
(Incorrect)
(Correct)
h
h>0
h>0
h
Figure 3.1.4 Mounting Positions
• Avoidairbubbles.
IMPORTANT
If air bubbles enter a measurement pipe,
owrateindicationsmaybeaffectedand
measurement errors may be caused.
Incaseswhereuidscontainairbubbles,pipingmust
be designed to prevent them from accumulating in
themeasurementpipeofaowtube.
Ifavalveexistsneartheowmeter,trytomountthe
owmeteronthevalve’supstreamsideinorderto
prevent a possible reduction of pressure inside the
pipe, thereby avoiding the possibility of air bubbles.
Valve
(Correct)
(Incorrect)
(Correct)
Figure 3.1.5 Avoiding Air Bubbles