Metrohm 730 Sample Changer - Manuel (Page 41)

3.2 Configuration
730 Sample Changer, Introduction 38
Work position
Correctly setting the work position is very important. This is the lift
height at which the corresponding sample rack will be processed.
It should be chosen so that the electrodes, burette tips and stirrer
are in the optimal position. The work position is indicated in mm
(from upper limit). In the 2-tower version of the changer this is
valid for both lifts.
An easy method for determining this position is to first set the de-
sired height manually (normal state) using the <ê> and <é>
keys. Afterwards the configuration menu can be opened and the
current lift position taken over in the display by pressing the
<CLEAR> key at the menu entry 'operating position'.
Rinse position
The rinse position defines the height, at which the lift is during the
rinsing of the electrode. As for the working position the rinse posi-
tion can be entered manually or taken over automatically. In the
2-tower model the shift position is valid for both lifts.
Shift position
In principle, the sample rack can only be turned when the lift (or
lifts) is/are higher or at the same height as the shift position.
The shift position should therefore be chosen so that safe turning
of the sample rack is possible, i.e. make sure that when the rack is
turning, there is no risk of breaking an electrode, etc. As for the
working position the shift position can be entered manually or
taken over automatically. In the 2-tower model the shift position is
valid for both lifts.
Special position
The special position defines another lift height. E.g., for pipetting
with the swing head, this additional lift position can be chosen in a
way that the pipetting tip just dips into the sample solution. As for
the working position the special position can be entered manually
or taken over automatically. In the 2-tower model the shift position
is valid for both lifts.
There are no commands combined with the lift positions. Thus,
they can be used in principal for any lift position that should be
stored.