NAVI D-25 Instruction Manual page 151

6 Maintenance and Troubleshooting
6.1 pH (ORP) electrode maintenance
● Extended storage
140
The liquid junction may become clogged if the electrode
is left in distilled water.
When an electrode is not to be used for a long period of
time, store the electrode after performing the following
steps. Also, replace the reference solution every three to
six months, using the method explained below.
1.
Remove the electrode from the pH meter.
2.
Remove the protective cap from the electrode.
Chemical warning
The liquid inside the electrode is highly
concentrated potassium chloride (3.33
mol/L KCl).
If the internal solution in the electrode
comes in contact with your hands or
Caution
skin, wash immediately with water. If the
internal solution comes in contact with
your eyes, flush immediately with large
amounts of water and seek treatment by
a physician.
3.
Open the internal solution filler port and use a
syringe to remove the internal solution.
HORIBA