Maintenance and care
multi EA 5000
154
Figure 72Correct handling of the combined electrode
Drying of electrolyte on the combined electrode can cause an irreversible reduction of its
sensitivity or damage the electrode. Therefore, make sure that the electrolyte never
dries on the combined electrode.
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For brief operational interruptions (one full day): Store the combined electrode in
fresh electrolyte solution.
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When put out of operation for multiple days: Carefully rinse the combined electrode
with ethanol and subsequently rinse it with ultrapure water. Also rinse the inner
opening for the gas inlet while doing so. Wipe the combined electrode with cellulose
and store it in dry condition.
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For intensive cleaning: Fill the measuring cell with ethanol. Insert the combined
electrode in the measuring cell and allow the solution to stir for several hours in the
detection module. Do not connect the measuring cell or the electrode to their elec-
trical connections for this.
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Before an end point routine: Store a new combined electrode or one that has been
stored in a dry place in fresh electrolyte solution for at least one hour.
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Do not touch the measuring cell and the electrode during operation (during a mea-
surement or an end point routine). The measurement result will be falsified other-
wise.
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The generator anode is located at the bottom of the measuring cell in the form of
the stable silver plate (silver circle). The silver electrode wears out with increasing
use. If necessary, the entire measuring cell must be replaced.
Sensor electrode
CAUTION
Risk of injury
A risk of injury due to broken glass is present when handling glass parts.
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Handle glass parts with extreme caution.
