wtw Turb 350 IR, Operating Manual, Page: 31 / 42

Maintenance, cleaning, disposal
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5.2 Cleaning
5.2.1 Cleaning the measuring instrument
Occasionally wipe the outside of the measuring instrument
with a damp, lint-free cloth. Disinfect the housing with iso-
propanol as required.
Warning
Avoid contact with acetone or similar detergents that contain
solvents as these can damage the housing. Remove any
splashes immediately.
5.2.2 Cleaning the cuvettes
Cuvettes used for measuring turbidity must be clean. There-
fore, clean them regularly:
Note
Scratches in the glass change the optical characteristics of
the cuvette and falsify the measured value. For this reason,
never use scratched cuvettes!
1 Clean the cuvettes inside and out with hydrochloric
acid or laboratory soap.
2 Rinse out several times with distilled water.
3 Let them dry in the air.
4 Only hold the cuvettes by the top or by the light pro-
tection cap so that the optical path is not impaired.