Aquacontrol Exclusiv 1,6 Mode D'emploi page 46

There are a number of potential causes of calibration errors:
• You have used the same buffer solution twice during calibration. Correct
calibration can only be carried out with two different technical buffer solutions.
pH 7 first and then pH 4.
• The measuring cable was connected incorrectly. The pH probe must be connected
to the left socket.
• The buffer solutions are exhausted. Try again using fresh buffer solutions.
• The measuring cable is defective or not connected. Please check the connection
between the electrode and the control unit.
• The pH probe is worn. The lifetime of a measuring electrode can be influenced
by quality of the water and care.
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