Hi there .
I am trying to find a working diagram to use or to modify for a project . I am trying to make a controller for a solder reflow station I am trying to make . It needs to control ramp rate and soak temperature of a 600w 240v ceramic heater , with K type thermocouple and zero crossing SSR . LCD display and USB or RS232 coms to a PC interface. Can anyone point me in the right direction please? . Thanks .

 

Try this:

http://electronicdesign.com/Articles/ArticleID/20639/20639.html

http://electronicdesign.com/files/29/20639/fig_01.gif