horiba LAQUA-PC1100, Instruction Manual

Page: 106 / 117

Troubleshooting
90
●
The response is slow
●
The indicated value does not change/No response
●
The measured value is outside the display range
When the measured value is below the display range, "Ur" appears. When the measured
value is over the display range, "Or" appears.
• How to check for instrument defect
Short the metal part of the outer tube to the center pin of the electrode
connector of the corresponding channel of the instrument. If "Ur" or
"Or" appears in this condition, consult your dealer.
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.
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.
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 electrode cable is broken. Replace the electrode.
Calibration is not performed or
performed incorrectly.
Perform calibration correctly.
Instrument defect Check as explained below.