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7 Maintenance/troubleshooting
7.1
Cleaning the conductivity sensor
• Light contamination can be wiped off with a soft, cleansing tissue, or similar
• Wash off sticky contamination or greasy and oily contamination with a hot
rinsing agent solution and a soft cloth or soft brush; Ethanol can also be
used to clean the sensor, if necessary
• Diluted hydrochloric acid (3 % by weight) can also be used to dissolve the
contamination in the event of calciferous coatings or precipitated metal
hydroxides or metal oxides
• If none of the methods mentioned above remove the contamination, other
solvents, acids or caustic solutions may be used, with the aid of ultrasonic
baths where required;
in this case, it is necessary to ensure that the conductivity sensor
components are resistant to the cleaning agents being used, see section 8
"Technical data"
Conductive conductivity sensors are not authorized for use in
highly adherent, oily or glutinous media - we recommend using our
inductive conductivity measuring instruments here!
After cleaning the conductivity sensor, always rinse it with water!
The conductive conductivity sensor electrodes are in direct
contact with the measurement medium. Regular cleaning must
therefore be performed, relative to the contamination
susceptibility of the measuring material!
Abrasive cleaners have limited suitability! The measurement
electrodes must not be damaged!