horiba D-72, Instruction Manual

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When an error message appears
D-72 55
●
ERR No.0005 Electrode sensitivity error
Detected that the electrode sensitivity is out of the setting range that allows proper
measurement.
●
ERR No.0006 Maximum calibration points exceeded
Attempted to perform 6th point calibration during pH calibration.
●
ERR No.0007 Cannot identify standard solution
Unable to automatically detect the standard solution during pH calibration.
Cause How to solve problem
The electrode is dirty Wash the electrode.
The electrode is cracked Replace the electrode.
Calibration was not performed
correctly.
Perform the calibration correctly.
The electrode is not connected
correctly
Connect the electrode correctly.
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.
There is a problem with the
standard solution.
Use new standard solution.
Cause How to solve problem
6th point Calibration is
attempted.
Up to five points can be calibrated.
Cause How to solve problem
There is a problem with the
standard solution.
Use new standard solution.
Settings about the standard
solution do not match the
instrument.
Check if the instrument settings and the specifications of
the standard solution are compatible.
The electrode is dirty. Clean the electrode.
The electrode is cracked. Replace the electrode.
The standard solution
concentration is fluctuating.
Replace the internal solution in the reference electrode.
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.