A TEMPERATURE CONTROLLER USEFUL FOR ON-LINE MAPPING IN PROCESS INDUSTRIES

摘要

A temperature controller useful for on-line mapping in process industries: In the present invention the temperature controller useful for on-line mapping in process industries has a set of temperature sensors (1) to sense the temperature within the process, analog multiplexer (2), to select the desired sensor, instrumentation amplifier (3) to amplify the signal from the multiplexer, analog to digital converter (4) to digitize the signal, programmable interface (5) to communicate the signals to the microprocessor (6), control logic (7) to generate the control and timing signals, clock (8) for generating the real time for online data acquisition for temperature mapping and control, display and printer interface (9) for seven segment display unit (13) and printer (14), programmable interface (10) for drive circuitry (11) to actuate the on/off solenoid valves (12) so as to control the heating and cooling phase in the process.