Cleaning - Kobold APS-Z Operating Instructions Manual

APS-Z/APK-Z/ARS-Z

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
Lime and metal hydroxide
coatings
Greases and oils
Protein
Accumulation
containing sulfides
Inorganic coatings
page 8
Cleaning agent
Diluted hydrochloric acid (1-3%)
Organic solutions (for example ethanol) or
a solution containing a surfactant
(dishwashing detergent, etc.)
Pepsin in diluted hydrochloric acid
Cleaning mixture consisting of
hydrochloric acid and thiourea
Hydrochloric acid (0.1 mol/l) or caustic
soda (0.1 mol/l)
APS-Z/APK-Z/ARS-Z K04/1122