horiba LAQUAact-PD110, Instruction Manual

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Troubleshooting
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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 >
< Problem with the instrument >
< Problem with the sample >
Cause How to solve problem
The electrode is dirty. Clean the electrode.
The electrode is cracked. Replace the electrode.
The wrong internal solution is
being used.
Use the correct internal solution.
There are air bubbles on the
electrode.
Shake the electrode to remove the air bubbles.
The level of internal solution in
reference electrode is low. Replenish the internal solution of the reference electrode
until it is higher than the level of the sample.
Cause How to solve problem
There is a motor or other device
causing electrical interference. Measure at a place where no influence from induction is
given. Ground all AC-powered equipment.
The electrode is not connected
correctly.
Connect the electrode correctly.
Cause How to solve problem
Electrode is not immersed
enough to cover liquid junction.
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.
The stability of electrode is
affected by the sample solution.
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.
The stirring is inappropriate.
Stir at an appropriate stirring speed (1000 rpm to 1500
rpm).