Agilent Technologies 1200 Series User Manual page 9

1
Introduction
Autosampler Thermostat Operation
channels of the heating/cooling module. The fan speed is determined
according to the environmental conditions (e.g., ambient temperature,
humidity). In the heating/cooling module the air reaches the temperature of
the Peltier elements and this thermostatted air is blown underneath the
special sample tray where it is evenly distributed and streams back into the
sample tray area. From there it is again drawn into the autosampler
thermostat. This "recycle" mode assures a very efficient cooling/heating of the
sample vials.
In cooling mode the opposite side of the Peltier element will become very hot
and to maintain the performance of the elements they have to be cooled down.
This is done with large heat exchangers in the back of the autosampler
thermostat. Four fans blow air from left to right through the instrument to
remove the heated air. The fan speed is controlled according to the
temperature of the Peltier elements.
During cooling condensation will appear in the heating/cooling module. The
condensed water will be guided out of the autosampler thermostat.
1200 Series AT User Manual 9