Instrument electronics circuit used for Coriolis flowmeter and method used for verifying flow calibration factors used by the circuit

Instrument electronics circuit used for Coriolis flowmeter and method used for verifying flow calibration factors used by the circuit

  • CN 1,289,408 B
  • Filed: 01/13/1999
  • Issued: 10/19/2011
  • Est. Priority Date: 01/29/1998
  • Status: Active Grant
First Claim
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1. a meter electronics that is used for coriolis flowmeter (5) is learned circuit (2), wherein said coriolis flowmeter comprises a flowtube (103A-B), a driver and a pickoff sensor (105-105 '"'"') that is attached on the described flowtube that is configured to vibration (104) described flowtube (103A-B), wherein said meter electronics is learned circuit and is comprised processor (201), and this processor comprises:

  • Be used to receive receiving trap, the vibration period of described flowtube when this signal indication is crossed described flowtube when a kind of flow of material with known density from the signal of described pickoff sensor;

    WithBe used to handle the treating apparatus of described signal with the density value that is calculated that is used to calculate the described material that flows through described flowtube;

    Be used to make a kind of flow of material to cross the device of the described flowtube of (401) described coriolis flowmeter with known density;

    Be used for when described flow of material is crossed described flowtube, make the device of described flowtube vibration (402);

    Be used for when described flow of material is crossed described flowtube, measure the device of the vibration period of (403) described flowtube;

    Described processor (201) is characterised in that and comprises;

    Be used for the described known density value of described material is compared with the described density value that calculates of described material to determine the comparison means of a deviation;

    WithBe used for examining the validation apparatus of a flow scale factor of using by described coriolis flowmeter according to described deviation.

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