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Statistical trend generator for predictive instrument maintenance

  • US 6,453,279 B1
  • Filed: 11/05/1999
  • Issued: 09/17/2002
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Term
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1. A method for detecting deterioration in a measurement sensor comprisingobtaining a measurement signal from the measurement sensor, obtaining a reference signal from a reference sensor, the reference signal being obtained independently of the measurement signal and being at least partially correlated with the measurement signal, generating an error signal from the measurement signal and the reference signal, and monitoring the error signal to detect deterioration in the measurement sensor.

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