is a field mounted process controller, suitable for Div. 1 hazardous area
accepts a 4-20 mA signal proportional to flow, pressure, level,
temperature, etc. and outputs a control signal of 4-20 mA. The output signal
typically operates a control valve to maintain the input at the set-point.
features to this design are the two external
push-buttons, which allow programming of the internal microprocessor
non-volatile memory without opening the box.
constants are set for tuning constants (Proportional, Integral and Derivative
gains), scaling of the display to show engineering units, etc.