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Control valve and positioner diagnostics

  • US 7,890,216 B2
  • Filed: 05/07/2009
  • Issued: 02/15/2011
  • Est. Priority Date: 01/05/2007
  • Status: Active Grant
First Claim
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1. A valve positioning system comprising:

  • at least two or more components, wherein at least one of the components comprises an electric-to-pressure output converter; and

    a controller configured to;

    adjust a position of a valve by sending a command signal to the electric-to-pressure output converter;

    individually monitor at least two of the components of the valve positioning system by determining an input signal to and an output signal from each of the at least two monitored components; and

    determine a condition for each of the at least two components being individually monitored at least partially by comparing the respective input and output signals from each of the at least two monitored components.

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