Cleaning; Cleaning The Measuring Instrument; Cleaning The Cuvettes - wtw Turb 555 Operating Manual

Maintenance, cleaning, disposal
64
6 Insert the new lamp module (lamp symbol must be
vertical), so that it locks into place and a click can be
heard.
7 Connect the instrument to the mains supply and
switch it on.
8 Calibrate the instrument (see section
4.4 C
ALIBRATION
operation again.
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.
CAUTION
Avoid contact with acetone or similar detergents that
contain solvents as these can damage the housing. Re-
move any splashes immediately.

5.2.2 Cleaning the cuvettes

Cuvettes used for measuring turbidity must be clean. There-
fore, clean them regularly:
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.
Note
Scratches in the glass change the optical characteristics of
the cuvette and falsify the measured value. For this reason,
never use scratched cuvettes!
). The instrument is now ready for
Turb 555 / Turb 555 IR
ba41113e07 04/2009