BUCHI KjelSampler K-377 - Manual (Page 72)

6 Operation
72 K-375/376/377 Operation Manual, Version B
Cleaning
With regular cleaning, the lifetime of the glass
parts can be extended. Thus it is recommended to
perform a few cleaning runs before switching off the
unit. The cleaning procedure is performed by means
of a distillation with water in a clean sample tube.
Thus all residues from the last sample determination
can be removed.
The volume of water to be used for each cleaning
cycle and the number of cleaning cycles can be
adapted just like the distillation time in seconds.
The steam output can be set between 30 and
100 %. In case a sampler is present, the Cleaning
cycle can be enhanced from “Unit only” to “via
sampler” – in this case the hoses from and to the
sampler are also cleaned.
Press START to start the cleaning procedure.
Press FACTORY DEFAULTS to reset the settings
of this screen.
NOTE
If only one cleaning run is selected and no aspira-
tion, no aspiration will be done at all.
If more than one cleaning run is selected and no
aspiration, the sample tube and the receiving vessel
will be aspirated between the single cleaning runs,
but not after the last run has been performed –
instead the system will be stopped after the last
sample.
Aspiration
The aspiration procedure automatically aspirates the
sample tube and/or the receiving vessel. All waste
liquids of both sources can be collected separately.
Select “Yes” to enable automatic aspiration or “No”
to switch of automatic aspiration for the respective
vessel.
Press START to perform the aspiration.