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Flow meter diagnostic processing

  • US 8,639,464 B2
  • Filed: 12/31/2008
  • Issued: 01/28/2014
  • Est. Priority Date: 01/18/2008
  • Status: Active Grant
First Claim
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1. A system for continuously monitoring performance of a rotary-type gas flow meter, the system comprising:

  • a pressure sensor module for measuring a differential pressure (dP) of a gas flowing through the gas flow meter, the pressure sensing module having an output signal;

    a processor module; and

    a data store communicatively connected with the processor module, the data store storing instructions executable by the processor,wherein the instructions executable by the processor include instructions to calculate a coefficient during a learning phase period, the coefficient based on;

    a plurality of measured dP of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured line pressures of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured flow rates of the gas flowing through the gas flow meter during the learning phase period,a plurality of measured temperatures of the gas flowing through the gas flow meter during the learning phase period, anda specific gravity of a gas flowing through a gas flow meter during the learning phase period, andwherein the instructions executable by the processor include instructions to calculate a first dP at a first instance of time, the first dP at the first instance of time based on at least the coefficient.

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