Metrohm 873 Biodiesel Rancimat Manual - Manual (Page 88)

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.