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Flow meter and method for detecting a cable fault in a cabling of the flow meter

  • US 7,953,568 B2
  • Filed: 02/27/2006
  • Issued: 05/31/2011
  • Est. Priority Date: 02/27/2006
  • Status: Active Grant
First Claim
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1. A meter electronics (20) for detecting a cable fault in a cabling (205) of a flow meter (5), with the meter electronics (20) including first and second pickoff sensors (201a and 201b) and the cabling (205) coupled to the first and second pickoff sensors (201a, 201b) and including one or more first pickoff wires and one or more second pickoff wires, with the meter electronics (20) being characterized by:

  • a signal injection device (203) coupled to the cabling (205), with the signal injection device (203) being configured to generate an injection signal and communicate the injection signal into the cabling (205) and to the first and second pickoff sensors (201a, 201b); and

    a signal conditioning circuit (202) coupled to the cabling (205), with the signal conditioning circuit (202) being configured to receive at least one response signal from at least one of the first and second pickoff sensors (201a, 201b) in response to the injection signal and determine one or more of a pickoff open wire fault and a pickoff connection orientation fault in one or both of the one or more first pickoff wires and the one or more second pickoff wires of the cabling (205).

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