Als Thermostat Operation - Agilent Technologies 1100 Series Reference Manual

1
Theory of Operation

ALS Thermostat Operation

special sample tray
air outlet
heating/cooling
module
ambient air in
thermostatted air
Figure 2
The thermostatted autosampler is equipped with a cooling/heating module
which uses Peltier elements for efficient air cooling. When turned on the front
side of the Peltier elements is heated/cooled according to the temperature
setting. A fan draws air from the sample tray area and blows it through the
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
12
ALS Thermostat Principle
heat exchanger
air channel in
autosampler sampling
unit
Peltier elements
heated air out
1100 Series AT Reference Manual