Thanks Dave. The project has been on hold for the last week. I got sidetracked (pleasantly) by a friend of mine at Freescale Semiconductor. I got their codewarrior development system in exchange for a commitment to do my next project using their hardware and software tools so I have been studying their IDE and brushing up on my C++ skills. I plan on getting back to it the welder project tomorrow. I will check the XRF out. I have a Miller Dynasty 300 TIG (inverter type) so I can do the testing myself. I'll keep you informed of my progress on this thread.

Thanks again for your help.

Ed