12
Theory of Operation
ALS Thermostat Operation
ALS Thermostat Operation
Figure 2 ALS Thermostat Principle
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 the Peltier elements and this thermostatted air is blown
air channel in autosampler
sampling unit
special sample tray
air outlet
Peltier elements
heat exchanger
heating/cooling module
ambient air in
heated air out
thermostatted air
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