Tim,

do you mind telling me what exactly control and relay you used?

Thanks,
Alex

tim wrote:
For a heat treating oven you want to use a solid state relay (ssr) .
When your oven reaches its setpoint the controler cuts on and off every
few seconds to maintain the temp.If you use a contactor you will hear
it clicking on and off hundreds of times an hour ,its just not made for
your setup .
Here is a picture of the controler and ssr relay I use on my homemade
heatreating oven.
http://metalworking.com/dropbox/_200...ce-control.jpg