Maintenance and cleaning
10
Cleaning
The active glass part of the electrode must not be
cleaned with abrasive or aggressive cleaning
agents (e.g. scouring milk). Scratches on the glass
part can damage the electrode.
However, dirt on the glass must be removed. Use therefore
a water-dipped soft paper towel and rinse the electrode with
clean water. If the contamination cannot be removed, you
can use the following cleaning agents:
For chalk or
metalhydroxide coatings:
Diluted hypochloric acid (1-3%)
For fatty or oily
contamination:
Organic solvents (e.g. ethanol) or
tenside containing solvents (e.g.
dishwashing agents)
For protein
contamination:
Pepsin in diluted hypochlorid acid
Maintenance
Under normal conditions (clean water, stable and
not extreme ORP values), a check every 14 days is
recommended, and if necessary a new calibration
must be performed.
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