Metrohm 862 Compact Titrosampler - Manual (Page 42)

4.4 Automation sequences ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
32 ￭￭￭￭￭￭￭￭ 862 Compact Titrosampler
4.4.4 Rinsing in sample
This automation sequence requires an 843 Pump Station for rinsing and
aspirating. The sample solution is aspirated after each determination. The
titration head with electrode and buret tips is subsequently rinsed in the
sample vessel. The rinsing solution is also aspirated.
If required, auxiliary solution can be added prior to the determination with
a Dosimat/Dosimat plus.
A filled rinsing beaker should be placed on the special beaker position.
The individual steps:
￭ Move to the sample
￭ Lower the lift to work position
￭ Start the determination
￭ If necessary, initiate dosing (Activation pulse) and switch on the stir-
rer
￭ If necessary, wait for Start delay time
￭ Wait for end of determination
￭ Switch off the stirrer and switch on the aspiration pump
￭ Wait for Aspiration time to be completed, the aspiration pump
remains switched on
￭ Switch on the rinsing pump and wait for Rinsing time to be comple-
ted.
￭ Switch off the rinsing pump and once again wait for Aspiration time
to be completed
￭ Switch off the aspiration pump and move the lift upward
￭ Wait for Dripping time to be completed
After the last sample:
￭ Moving to special beaker position
￭ Lower the lift to work position
4.4.5 Rinsing in special
This automation sequence requires an 843 Pump Station for rinsing and
aspirating. The titration head with electrode and buret tips is rinsed in the
rinsing beaker after each determination. The rinsing solution is aspirated at
the same time.
If required, auxiliary solution can be added prior to the determination with
a Dosimat/Dosimat plus.
An empty rinsing beaker should be placed on the special beaker posi-
tion.
The individual steps:
￭ Move to the sample
￭ Lower the lift to work position