<2. Installation>
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IM 12B07W01-04EN 1st Edition : Nov. 11, 2016-00
2.2 Installing the PH8HS3 Holder
2.2.1 Where to install the holder
The PH8HS3 holder must be installed in a location which is appropriate for pH measurement and
control and satises the following requirements.
(1) Safe and easy access for maintenance work.
This requirement must be satised since the holder is raised and removed when attaching/
detaching the pH sensor.
(2) Even in winter, the temperature must remain above that temperature at which the
chemical solution freezes.
Also, any condensation on the moving parts of the PH8HS3 holder cannot be allowed to
freeze.
(3) Protected from excessive dust in the air.
The presence of excessive dust may lead to an increased need to clean (removal of dust
from the cylinder).
2.2.2 Installation Facilities
The PH8HS3 holder is mounted on a 50A (OD: 60.5 mm) pipe installed in an upright position.
Provide the installation location with facilities to set the pipes and inserting sensors Special
attention must be paid to the following points when constructing these facilities:
l Position of pH measurement point (position of pH sensor) in relation to the
mounting pipe
Ｆ2.3.ai
Mounting pipe
Approx. 150
pH sensor
485 maximum
(Can be shorted in length of 205 mm by 35 mm pitch)
Unit: mm
110 or more
pH sensor
160 or more
60 or more
Machining of opening for inserting pH sensor
(for tanks with a covering)
Figure 2.3 Position of pH Sensor in Relation to Mounting Pipe with Dimensions of Opening for
Inserting pH sensor
l Height (length) of mounting pipe
H
P L
F2.4.ai
Position of upper mounting bracket
(Pitch: 300 mm)
Position of lower mounting bracket
More than 310
Covering (machined
to provide an opening)
Measured solution
Mounting pipe
(OD: 60.5 mm)
Nominal Stroke L P H
300 mm 400 minimum 300 500 to 590
600 mm 700 minimum 300x2 500 to 890
1000 mm 1000 minimum 300x3 500 to 1290
1500 mm 1000 minimum 300x4 500 to 1790
Ground
Note: When employing a covering to prevent
the chemical solution from spattering,
refer to the dimensions of the opening
for inserting the pH sensor shown in
Figure 2.3.
Unit: mm
Figure 2.4 Length (Height) of Mounting Pipe
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