> What exactly are you testing (what is your goal)? That changes
> the answer to
> your question.
>
> The bottom line is you have to have a clear goal in mind that the one you
> stated so far to get a good burn in test.
>
> Are you looking for solder joint problems? Then you need to cycle
> thetempaturee betwen high and lows, several times. Like +75'C to -20'C.
> Device does not need to be powered.
>
> If your looking for infant mortality then you need to have the
> thing powered.
> The change in temp. is not that important.
>
Ok, I guess I wasn't real clear on my goal. The design has already
been verified at the temperature extremes. What I am trying to acomplish
with a burn in test is to weed out premature failures, or "infant mortality"
as you say. I would like to give each unit a "burn in" before it is
shipped.
I do have access to a temperature chamber, but I didn't know
if it would be wise to conduct such a test at an elevated temperature.
It would seem that a burn in at an elevated temperature would be more
likely to weed out the parts that may be premature failures, however
wouldn't it also tend to shorten the life of all the components because
of the elevated temperature ?
Thanks,
Jeff
--
Author: Jeff McKnight
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