Diagnostic control systems with alarm procedure.

摘要

A combustion control system includes a sensor assembly (11) and a process controller (12), the sensor assembly (11) including sensors (14 to 18) for providing output signals indicative of process variables, and the process controller (12) responding to the output signals to maintain a desired operation of the process. The process controller (12) continuously monitors parameters of the sensors (14 to 18) and provides alarms whenever any of these parameters deviate from setpoint values, the process controller (12) automatically prioritising these alarms to provide a display of only the most relevant alarms. A housing enclosing the processor controller (12) provides electromagnetic and/or radio frequency interference (EMI/RFI) sheilding of the process controller (12) including attenuation and absorption of EMI/RFI energy.