horiba LAQUA 2000 Series, Instruction Manual

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Error Messages and Troubleshooting
71
< Problem with the sample >
The response is slow
The indicated value does not change
The measured value is out of the measurement range
When the measured value is below the display range, “Ur” appears. When the measured value
is over the display range, “Or” appears.
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.
Cause How to solve problem
The electrode is dirty. Clean the electrode.
The electrode is broken. Replace the electrode.
The response 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.
Cause How to solve problem
The electrode is cracked. Replace the electrode.
The electrode is not connected
correctly.
Connect the electrode correctly.
The instrument is in HOLD state. Cancel the HOLD state.
Instrument defect. Consult your dealer.
Cause How to solve problem
Sample is out of the measurement
range.
Use a sample within the measurement range.