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Troubleshooting
This section describes causes and actions to take for problems that customers
frequently ask us.
● The indicated value fluctuates
< Problem with the electrode >
Cause
The electrode is dirty.
The electrode is cracked.
The wrong internal solution is
being used.
There are air bubbles on the
electrode.
The level of internal solution in
reference electrode is low.
< Problem with the instrument >
Cause
There is a motor or other device
causing electrical interference.
The electrode is not connected
correctly.
< Problem with the sample >
Cause
Electrode is not immersed
enough to cover liquid junction.
The stability of electrode is
affected by the sample solution.
How to solve problem
Clean the electrode.
Replace the electrode.
Use the correct internal solution.
Shake the electrode to remove the air bubbles.
Replenish the internal solution of the reference electrode
until it is higher than the level of the sample.
How to solve problem
Measure at a place where no influence from induction is
given. Ground all AC-powered equipment.
Connect the electrode correctly.
How to solve problem
The electrode must be immersed up to the liquid junction.
As a guide, immerse to at least 3 cm from the tip of the
electrode.
It is important to select an electrode that is appropriate
for the sample. Consult your dealer. To confirm an
electrode that is appropriate for the sample, check the pH
electrode selection guide in our catalogue, or refer to our
website.
Troubleshooting
105
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