3-Channel Data Acquisition Process Control (T5553-R1A) by Amatrol adds to the Thermal Process Control Learning System (T5553) to teach the fundamentals of data acquisition. This system consists of equipment used to receive, record, and analyze process data. A chart recorder is one of the most commonly used pieces of data acquisition equipment. Chart recorders create a graphical representation of an electrical input signal received from an input device and provide an on-screen display of the process results.