Specification for the Microprocessor Control of Pressure Within a Pilot Distillation Column

This report is the first of a short series, the object of which is to aid the development of a microprocessor system for the control of the pressure within the pilot distillation column installed in the Department of Control Engineering. The system is intended to replace an existing scheme (1,2) based on the use of a VIDAC analogue computer whilst retaining existing proprietory analogue control loops for the regulation of the supply of heat and coolant to the plant