Re: [ATM] Electronics help needed - temperature control

[Mark Holm <mdholm@telerama.com>]

Mark Holm wrote:

> Really, one might want a V shaped response curve.  One leg for cooling
> temperature vs. time and the other leg for warming, just in case.  That
> is, unless the mirror is equipped with the dew heater.  OK, the V shaped
> response is probably gilding the lily.  It might be useful for a few,
> but probably not for most.
> 
Having written that, I am having second thoughts about the hedging
sentences.  When air temperature is not dropping rapidly, the mirror
might radiation cool below air temperature.  That is, after all, one of
the situations that causes dew condensation.  Maybe the V shaped curve
isn't so loony.  Use the fan for heating as well as cooling.  In some
climates, it might be enough to keep dew at bay.  Plus, a cold mirror is
going to form just as nasty a boundary layer as a warm one.

Mark Holm
mdholm@telerama.com

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