[sdiy] Peltier Elements

[ASSI]

On Tuesday 13 May 2003 23:31, Magnus Danielson wrote:
> With peltier elements you might even be able to get a -20 °C sample.

Martin talked about a temperature chamber, which I envisioned as 
something you can put a complete VCO in for instance. For such an 
arrangement it becomes increasingly difficult and expensive to 
controllably maintain more than 10K...15K below ambient, especially 
when the DUT is producing around 1W or so of heat of it's own. It is no 
accident that commercial equipment for that purpose uses a large, noisy 
refrigerator (often enough water cooled themselve - with chilled water 
that is) to cool down (and dry) air that is then used to cool the 
specimen.


Achim.
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