Model 2704 is a high accuracy, high stability instrument designed for demanding, multi-loop control applications such as furnace and kiln control, environmental chambers, and batch production processes. It features a 120 x 160 pixel electro-luminescent display on which all the process information is displayed. Process and programming information is presented in alphanumeric and graphical form, and the interface is menu driven via the display and 7 front panel keys. In addition, the instrument incorporates a self-correcting input circuit to maintain calibration accuracy.