Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Richard <metal@...> wrote:
>
> 
> Excellent post Bill....good detailed report.
> 
> I'll note only one thing:  you're either not accounting
> for emissivity in your optical temp-measurements; or
> you were measuring a broken household iron.

Yes, if a pyrometer is used, then it is almost certainly calibrated
for an 80% black surface. Shiny metal or white will show a false low temp.

> The temps you reported were at or below the boiling
> point of water.  The bottom surface of the normal 'iron'
> gets far hotter than that.  One doesn't need a thermometer
> for it even...just crank up an iron for a few minutes, then
> turn it over and sprinkle water on it... <g>

I thought he said 200C, 392F.

Steve Greenfield