Control Valve Diagnostics

The microprocessor inside the digital valve controller allows the positioner to run, analyze, and store diagnostic tests. Diagnostic information is useful in determining the health of the entire control valve assembly. Through the use of pressure sensors, temperature sensors, travel sensors, and internal readings, graphical representations of control valve performance and health are created and recommended actions are presented. This information is then used to identify elements of the control valve assembly that may require maintenance.

In-service diagnostics can detect problems with instrument air quality, leakage, and supply pressure restriction, and can identify control valve problems such as excessive friction, dead band, and falling out of calibration.