It depends on what aspects of process control are of interest to you. For the systems aspects, contact the manufacturer of the control equipment. In addition to formal courses, most of their training organizations also offer materials for self-study.

 

At the technician level, the Instrument Society of America (www.isaq.org) offers a variety of materials, including certificate progams.

At the engineering level, a web-based offering on Process Control is available from the Georgia Tech Distance Learning and Professional Education (www.pe.gatech.edu). Keyword search: CHEM).