Am Fri, 13 May 2016 20:28:04 -0500 schrieb David <[email protected]>:
> It figures that HP would have done this if anybody had. I am not that > familiar with their design history so thanks for bringing this to my > attention. > > I did not find anything in the theory section of the original service > manual although it does have the schematic but K04BB has a supplement > which discusses the 3450A peltier chamber and circuit in detail. They > even sort of mention that the gain of the peltier differs > significantly between heating and cooling. Well, that shouldn't come as a surprise to anyone who actually worked with peltiers for thermal control. It's intrinsic to the way they work. a bit simplified: One can use a peltier to pump heat from one side to the other. The catch is, that additionally to the heat transferred, the electrical power put into the peltier to enable its heat transfer also shows up at the hot side. And, that electrical power is much more than the heat transferred... Best regards, Florian _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
