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Electronics board life prediction of microprocessor-based transmitters

  • US 20020121910A1
  • Filed: 03/05/2001
  • Published: 09/05/2002
  • Est. Priority Date: 03/05/2001
  • Status: Active Grant
First Claim
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1. A field device, having two terminals coupleable to a 4-20 mA process control loop, the field device comprising:

  • device electronics drawing a supply current from the 4-20 mA process control loop;

    supply current measurement circuitry adapted to measure a parameter related to supply current consumed by the device electronics;

    a memory structure adapted to receive and store data related to a plurality of successively measured supply current parameters; and

    a prediction engine coupled to the memory structure to calculate a life estimate for the device electronics based upon the plurality of supply current parameters.

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