Fritsch ANALYSETTE 28 IMAGESIZER, Руководство по эксплуатации

Страница: 47 / 66

7.5 Cleaning the hoses
You can clean stubborn soiling in the hoses of the wet dispersion unit by
adding quartz sand. The feed particle size of the sand used should be
between 1 and 2 mm. Sand that is too fine can add to the already
existing soiling, sand that is too coarse can clog the system.
Proceed as follows for cleaning the hoses:
1.
Empty the sample bath.
2. Remove the hoses on the measuring cell insertion and connect
both hoses with the supplied connector. This creates a new liquid
circulation system.
3. Fill the sample bath with liquid.
4. Set the pump power to maximum and add 10 ml of sand (feed par-
ticle size between 1 and 2 mm) to the sample bath.
5. Let the pump run for approx. 2 minutes. Then rinse the system 2 -
3 times to rinse out all the dirt.
7.6 Cleaning the wet measuring cell
NOTICE!
The measuring cell glasses should always be cleaned
with the same liquid that is used for the actual meas-
urement. The addition of tensides is also permitted.
Normally it is sufficient to rinse the measuring cell in the liquid in which
you measure. To remove stubborn residues you can add a cleaning agent
to the rinsing liquid. A few drops of a tenside (surfactant, e.g. Span 80
TM
)
or a surface-active household cleaner (washing-up liquid e.g. Pril TM or
liquid soap) is usually enough.
Cleaning
- 47 -