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2.1.2
Mounting Glass Electrode
Mount the glass electrode on the sensor body as per the following procedure:
(1) Peel off the seal from the electrode mounting hole on the sensor body.
(2) Remove the cap for the glass membrane. Wipe off any solution remaining on the O-ring with a
tissue or other material.
(3)
Remove the cap for the gold-plated pin.
(4) Confirm that there is no damage on the O-ring that might affect its sealing performance.
(5)
Mount the glass electrode on the sensor body. Insert the electrode in the mounting hole and
screw it clockwise until the O-ring fits tightly in the hole.
NOTE
• A s shown in Figure (a), the cap for the glass membrane contains the solution to keep wet (pH4 buffer
solution). Do not splash the solution when removing the cap. Remove the cap carefully because the
rod beside the glass membrane is very fragile.
• Before mounting the glass electrode on the sensor body, make sure that the O-ring and the gold-
plated pin are not wet. Wipe off any remaining solution.
• M ake sure that there are no droplets in the mounting hole. Wipe off any droplets, or they may cause
insulation failure.
• Use the electrode within one year after purchase. The solution to keep wet gradually evaporates
over time. A glass electrode whose glass membrane has dried out does not provide stable readings
until it gets used to the solution. As shown in Figure (b), place in advance the glass electrode either
in the pH4 or pH7 buffer solution for more than a day before using.
Cap for the gold-plated pin
Cap for the glass membrane
Solution to keep wet (inside)
(a)
2.1.3
Mounting Liquid Junction
The liquid junction is mounted in the sensor body when the KCl solution is poured into the sensor
body. Refer to Section 2.2.
2.1.4
Installing Holder
Usually, the pH sensor is suspended in a guide pipe or installed in a flow-through or submersible
holder. First install the holder.
2.1.5
Installing Associated Instruments
Make sure that the associated instrument (a pH transmitter/converter or a junction terminal box) to
which the pH sensor cable is connected has already been installed.
Make sure the part above the O-ring is not wetted.
Case part No.: K9008WT
(b)
< 2. Installation >
IM 12B7J2-01E
11th Edition : Nov.20,2018-00
2-2
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