YOKOGAWA ADMAG AM100D, Руководство пользователя

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IM 1E6D0-01E 3-2
3. INSTALLATION
(5) Liquid Sealing Compound
IMPORTANT
Please give attention in using Liquid Sealing
Compound to the piping, because it brings bad
influences to measurement by flowing out and
cover the surfaces of electrode and earth-ring.
(6) Service Area
Please select the location where there is enough area to
service installing, wiring, overhaul, etc.
(7) Bypass Line
It is recommended to install the Bypass Line to
facilitate maintenance and zero adjustment.
Bypass valve
Block valve
Block
valve
F030103.EPS
Figure 3.1.3 Bypass Line
(8) Supporting the Flow Tube
CAUTION
Please avoid to support only the flow tube, but
fix pipes at first and support the flow tube by
pipes to protect the flow tube from forces caused
by vibration, shock, expansion and contraction
through piping.
For small sized flow tubes, please provide a
mounting base so thet the tubes are fixed in the
piping. See the section 3.3 Mounting.
(9) Piping Condition
IMPORTANT
The piping should be designed so that a full pipe
is maintained at all times to prevent loss of
signal and erroneous readings.
Please design the piping that a fluid is always filled in
the pipes. The Vertical Mounting is effective for fluids
that is easily separate or slurry settles within pipes.
In this case, please flow a fluid from bottom to up.
(GOOD)
(GOOD)
(BAD)
(BAD)
h
h>0
h>0
h
F030104.EPS
Horizontal mounting Vertical mounting
Figure 3.1.4 Filling the Pipe with Liquid
(10) No Air Bubbles
IMPORTANT
Please give attention to prevent bad influences
or measuring errors from air bubbles that gath-
ers inside measuring pipes.
In case the fluid includes air bubbles, please design the
piping that prevent to gather air bubbles. In case valves
are installed upstream of the flow tube, it is possible
that a valve causes air bubbles, please install the flow
tube upstream side of a valve.
(GOOD)
(BAD)
F030105.EPS
(BAD)
(GOOD)
Figure 3.1.5 Avoiding Air Bubbles
(11) Mounting Direction
IMPORTANT
When the electrodes are vertical to ground, the
electrode is covered with air bubbles at upper
side or slurry at downside, and it may cause the
measuring errors.
Please be sure to mount the terminal box upper
side of piping to prevent water penetration into
terminal box.
(Good)
(No good)
Electrodes
Air Bubbles
Slurry
Electrodes
F030106.EPS
(No good)
Water slowly
percolates
downward into
terminal box.
Figure 3.1.6 Mounting Direction