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3.3 Installation and Piping
Installing the density meter is illustrated in Fig. 3.3.1 and Fig. 3.3.2, Fig.3.3.3, Fig.3.3.4.
[NOTE]
<Common Precautions>
(1)
Install the density meter in a place where the distribution of density is even.
(2)
Install the density meter in a location where the measured fluid flows in a tank or pipe in full and bubbles
do not stay. Insufficient fluid flowing or bubbles staying in the tube will cause measuring errors or
indicated-value fluctuations.
(3)
Avoid installing the density meter where the material to be measured precipitates and accumulates at
the bottom of the tank or pipe.
(4)
Avoid installing the density meter in a tank or pipe where bubbles are mixed in the fluid to be measured.
(5)
The front side of the density meter's converter section is equipped with an LED density display section.
When installing the meter, choose a location and direction in which this density display section will be
easily visible. However, if it is difficult to look straight at the density value display area as a result of
installation layout, we recommend you order an optional external display unit.
(6)
In the event that the tank or piping system (where the density meter is installed) may no longer be full of
the fluid while the pump is shut down or the density distribution in the density meter may become
uneven, make sure to take measurements only while the pump is operating by using the external
interlock function.
(7)
Take necessary measures to prevent vibrations of the pump, etc. from travelling through the density
meter.
(8)
Select the type and material of the gasket to use in the tank or pipe in accordance with the connection
method and the fluid material to measure.
(9)
Make sure that the surface for the O-ring face and O-ring itself are clean without dirt or dust before
starting the installation work.
(10) We recommend the following tightening torque for bolts and nuts when mounting the flange for the
density meter. Tightening torque: 10.0 to 13.5 N•m for M8 bolts and nuts
(11) Perform the periodical inspection to make sure that the thin and long materials such as fur, fiber or
strings are not entangled in the applicators (antenna), or there are no scratches or cracks.
(12) Make sure that the applicator (antenna) is positioned more inside than the internal wall of the tank or
pipe. The distance from the mounting flange face of the insertion probe area to the internal wall should
be 120 mm or less.
<Piping Precautions>
(13) We recommend the installation should be made to a vertical piping system. The density meter can
operate the same performance even in a horizontal installation but only a vertical installation is allowed
for item (14).
(14) The installation should be made to a vertical piping system in the following cases:
a) Bubbles may remain in the piping.
b) The distribution of density in the piping may become uneven because the material to be
measured precipitates or floats unusually due to slow flow rate etc.
c) When main piping is enlarged and the density meter is installed to a larger piping system than the
main piping.
(15) We recommend that the converter section stay at the top when the density meter is installed to a
horizontal piping system because the maintenance is easy and its performance is assured.
(16) We recommend that the density meter should be installed at a point as far away as possible from a port
open to atmosphere and the water pressure is required a little to prevent bubbles from entering in the
fluid to be measured.
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