Abnormal Analysis Process of Temperature Control Appearance System

when analyzing the failure of temperature control instrument , two points should be paid attention to first: the system equipment is mostly accurately measured, marked and operated with intelligent semantic meters; The accurate measurement of the system equipment usually lags behind.

(1) intelligent temperature controller The identification value of the system software instantly changes to be larger or smallest, usually indicating system abnormality. Due to the significant measurement lag in intelligent temperature controller systems, abrupt changes are unlikely to occur. The problems at this time are mostly caused by thermal resistance, thermocouple, tungsten rhenium thermocouple disconnection or failure of intelligent transmitter amplifier. (2) The temperature control system indicates rapid oscillations, often caused by improper tuning of the main PID parameters.

(3) The temperature control equipment system prompts a sudden slight increase in ups and downs, which is likely to be caused by changes in the actual operation of the processing process. If the actual operation of the processing process does not change at that time, it is likely to be a common fault of the instrument panel system itself.

(4) temperature meter system's own problem analysis process: check whether the input data signal of the regulating valve is changed, the input data signal is not changed, and adjust the valve posture, the pulse damper of the regulating valve diaphragm head leaks; Check whether the input data signal of the regulating valve locator has changed, the input data signal does not change, the output data signal changes, and the locator has common faults; Check whether the input data signal of the locator has changed, and then check whether the output of the controller has changed. If the input of the controller does not change, the output changes, then it is a common fault of the temperature controller.