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Startup and operational techniques for a digital flowmeter

  • US 6,950,760 B2
  • Filed: 03/31/2003
  • Issued: 09/27/2005
  • Est. Priority Date: 03/29/2002
  • Status: Expired due to Term
First Claim
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1. A digital flowmeter comprising:

  • a vibratable flowtube;

    a sensor connected to the flowtube and operable to sense information about a motion of the flowtube;

    a driver connected to the flowtube and operable to impart energy to the flowtube;

    a filter system;

    a random-value generator operable to generate random-frequency signals; and

    a control and measurement system operable to apply the filter system to the random-frequency signals and supply filtered, random-frequency signals to the driver for application to the flowtube of a first drive signal during a first mode, and further operable to transition the digital flowmeter into a second mode characterized by a second drive signal.

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