On 08/28/2015 12:55 PM, Mark J. Blair wrote:
On Aug 28, 2015, at 10:41 , Jon Elson <[email protected]> wrote:
The trick is to poke a tiny thermocouple into a plated through hole in one of
the boards. Then, the controller is measuring actual temperature. I tried
having the thermocouple in the air, and the boards got seriously fried.
I had planned to tape a thermocouple to the board, but putting it in a plated
through hole seems like an even better idea. For my own board designs, I can
make sure to include a hole of the right diameter for whatever thermocouple I
use, at my best guess of an optimum point on the board to measure temperature.
I was lucky to get 1000 feet of tiny thermocouple wire in an
odd type (Type E) . But, my temp controller had that type
available in its menu.
Then, the only problem is the temp variation across the size
of the oven, which can be considerable.
Jon
