wtw Turb 550, Руководство по эксплуатации

Страница: 40 / 54

Maintenance, cleaning, disposal
40
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 cells
Cells used for measuring turbidity must always be clean.
Therefore, clean them regularly:
Note
Scratches in the glass change the optical characteristics of
the cell and falsify the measured value. For this reason, nev-
er use scratched cells!
15 Calibrate the instrument (see 4.4 C
ALIBRATION
). The
instrument is now ready for operation again.
1 Clean cells 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 cells by the top or by the light protective
cap so that the optical path is not impaired