Metrohm 789 Robotic Sample Processor XL - Manual (Page 100)

3.7 Sample racks
92 Metrohm Sample Processor, Operation
3.7.3 Rack data
In many applications the method and beaker sizes must be observed
exactly. As sample racks are intended for particular beaker sizes, the
rack definitions also contain, in addition to the rack positions them-
selves, data about the lift positions that are directly associated with the
particular beaker size.
The following data can be defined for each rack:
Rack name Unambiguous identification, ordering
number is standard
Code Magnet code for automatic rack rec-
ognition
Work position Working height for Lift 1 and 2 *
Rinse position Rinsing height for Lift 1 and 2 *
Shift position Shifting height for Lift 1 and 2 *
Special position Additional height for Lift 1 and 2 *
Beaker radius Radius of sample beaker
Beaker sensor Beaker checking mode
Special beaker positions 16 reserved rack positions with individ-
ual working heights, beaker radius and
beaker sensor test
* can be set for both towers separately
The rack name is used for the unambiguous identification of a rack.
The standard name stored for the rack is the ordering number. In a
method, this can be assigned to a particular rack name (see Sec-
tion 3.3.1). The automatic rack recognition ensures that if an incorrect
rack is used this will be recognized and the user will be informed of this.
The code is used for automatic rack recognition. You must make sure
that this 6-place binary code coincides with the actual magnet code set
on the rack. Rack codes can be altered as required. However, they
must always be assigned to a single rack only. Avoid the use of the
predefined codes for the standard racks supplied by Metrohm, see also
p. 90.
The working position is used for defining the lift position at which a
sample is to be processed. This means that the ideal setting for a par-
ticular sample rack can be defined depending on the height of the
sample beakers. In manual operation this working position can be
moved to directly with the key. In a run sequence this can be
programmed with LIFT :1 : work mm .