Metrohm 789 Robotic Sample Processor XL - Manual (Page 18)

1.5 Connections
10 Metrohm Sample Processor, Introduction
Fig. 6 Beaker sensor on the
tower
Optical beaker sensor
Each tower of a Metrohm Sample
Processor is equipped with a beaker
sensor that detects the presence of
a beaker in front of the tower. With
this infrared sensor beakers made
from different materials can be de-
tected, provided that they are lo-
cated in the correct position in front
of the tower and the beaker sensor
'Tower' has been selected in the
rack definition. This "Beaker test" is
carried out after each MOVE com-
mand (i.e. each rotation of the rack).
The beaker sensor on the tower can
only be used with single-row sample
racks.
Fig. 7 Sensor on a robotic arm
Tactile robotic arm sensor
Robotic arms with piezo sensors
may be used with multi-row racks.
The sensor is activated, when the lift
is run to work position and makes
physical contact with a sample
beaker.
Splash protection/
Safety shield
Beaker sensor
Sample rack
Piezo sensor