Abstract: An automated process control prover system for (1) performing tasks, including tests, at the circuit loop termination on a termination base located between interconnected control room instrumentation and field equipment, (2) for performing tasks, including tests, to the circuit loop terminations at the control room instrumentation and field equipment locations and (3) for calibration of the field equipment. The prover system includes an improved termination base for allowing selective access to a predetermined number of the circuit loop terminations, a multiplexer for providing the selective access to one of the circuit loop terminations, and a computer for performing the tasks at the termination base.