Metrohm 1.873.0014, Manual

Page: 88 / 192

4.6 Determinations
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
80 ￭￭￭￭￭￭￭￭
873 Biodiesel Rancimat
The determination is automatically saved in the database
Repos.mrd . The channel is ready for starting a new determination.
2 Clean vessels and accessories
Note
Always clean the vessels and accessories directly after each deter-
mination (see Chapter 4.6.4, page 80) .
4.6.4 Cleaning the instrument and accessories
1 Clean the measuring vessels and accessories
￭
Clean used
measuring vessels
after pouring off the measuring
solution with acetone or 2-propanol. Pre-clean with washing-up
liquid in the case of severe contamination.
￭
Rinse the product thoroughly with distilled water.
￭
Clean the measuring vessel covers (5-
16
) , the PTFE tubes
(5-
17
) and the electrodes (5-
18
) with acetone or 2-propanol and
rinse with distilled water. Pre-clean with washing-up liquid in the
case of severe contamination.
Remove the protective ring
(5-
19
) to be able to clean the electrodes.
2 Clean the reaction vessels and accessories
￭
Dispose of used
reaction vessels
and
air tubes
and use new
reaction vessels and air tubes for the next measurement.
￭
Clean the reaction vessel covers with acetone or 2-propanol and
rinse with distilled water. Pre-clean with washing-up liquid in the
case of severe contamination.
￭
Then heat the reaction vessel covers in the drying oven for 2
hours at 80 °C.
Note
Replace the reaction vessel covers if they are not tightly on the reac-
tion vessel anymore or the material is obdurate.
3 Clean the tubings
￭
Clean the Iso-Versinic
®
tubings (5-
2
) with acetone or 2-propanol
and rinse with distilled water. Pre-clean with washing-up liquid in
the case of severe contamination.