multi EA 5000
Maintenance and care
153
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For the "sensitive" and "high concentration" measuring cells: Replace the electrolyte
solution daily.
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For the "high sensitive" measuring cell: Refill the electrolyte solution daily.
Only replace the electrolyte solution in the event of analytical problem and if crys-
talline deposits form.
}
For replacement of the electrolyte: Empty the measuring cell. Dispose of the elec-
trolyte solution.
}
Rinse the empty measuring cell and the magnetic stirrer first with ultrapure water,
then with ethanol.
}
Carefully wipe the measuring cell and the magnetic stirrer with tissue to remove any
possible silver chloride residue.
}
Fill the measuring cell with fresh electrolyte solution:
"high sensitive" measuring cell: 65 ml
"sensitive" measuring cell: 15 to 20 ml
"high concentration" measuring cell: 120 ml
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The measuring cell is ready for operation again.
Also observe the following:
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If the detection module is put out of operation for multiple days, clean the measur-
ing cell and store it in a dry place.
¡
Check the casing of the magnetic stirring rod for cracks regularly. If metal ions from
the stirring rod come into contact with the electrolyte solution, they can disrupt the
analysis.
¡
Due to risk of short-circuits: Prevent fluids from entering the stirring/cooling block
and the plug-in contacts.
14.11.3 Maintenance and storage of the electrodes
Combined electrode
NOTICE
Risk of possible destruction of the electrode due to cleaning, abrasive or polish-
ing agents.
The combined electrode consists of ceramic materials which is mechanically sensitive
especially near the fused electrodes.
¡
Only rinse the combined electrode with ethanol and ultrapure water to clean it.
When handled incorrectly, the electrical connection of the combined electrode can
break.
¡
Carefully remove the electrode from the lid of the measuring cell.
¡
Grip the electrode from above and pull it straight out of the lid.
¡
Do not pull on or jerk the side connection sleeve for the electrical connections.
The connections in the sleeve will break otherwise (not visible from outside)!
