APS-Z/APK-Z/ARS-Z
page 8
APS-Z/APK-Z/ARS-Z K04/1122
7. Cleaning
The membrane glass must never be exposed to aggressive or abrasive cleaning
agents (scouring milk, etc.)!
Cleaning the membrane glass must not result in any scratches!
Impurities that have accumulated on the surface of the membrane glass and
diaphragm must be removed!
The electrode must be adequately washed off after every cleaning!
If careful dabbing with a soft moist cleaning tissue proves unsuccessful,
various chemical cleaning methods can be used depending on the type of
impurity:
Type of accumulation
Cleaning agent
Lime and metal hydroxide
Diluted hydrochloric acid (1-3%)
coatings
Greases and oils
Organic solutions (for example ethanol) or
a solution containing a surfactant
(dishwashing detergent, etc.)
Protein
Pepsin in diluted hydrochloric acid
Accumulation
Cleaning mixture consisting of
containing sulfides
hydrochloric acid and thiourea
Inorganic coatings
Hydrochloric acid (0.1 mol/l) or caustic
soda (0.1 mol/l)