[Shop-talk] IR temperature meter

[David Scheidt]

On Fri, Jan 29, 2010 at 1:36 PM, <pethier at comcast.net> wrote:

> ----- "Elton E. (Tony) Clark" <eltonclark at gmail.com> wrote:
>
> > *I have a little IR temperature meter which I use around the shop
> > checking
> > AC in and out temps, motor temps, etc . . one day I was outside
> > checking the
> > wall temp to see how my insulation was working, it was about 50
> > degrees
> > ambient and . . . I aimed the meter at the clear blue sky:  It read
> > minus 15
> > degrees!!!!!!       Is it really measuring something?  Is that a
> > default?
> > HELP!!!!!*
> >
> > *Tony*
>
> What temperature do you think it is way up there?
>
>
Clear sky is cold!  People have died of exposure from radiative cooling when
the air temperature is in the 60s.  (Stupid people who think sleeping on a
hilltop would be a good idea, but still.)

that's why it gets *cold* in the winter when the night is clear.

-- 
David Scheidt
dmscheidt at gmail.com