US 8,135,552 B2 · Flow meter and method for detecting a cable fault in a cabling of the flow meter

Abstract

A method for detecting a cable fault in a cabling of a flow meter is provided according to an embodiment of the invention. The method includes testing one or more first pickoff wires and one or more second pickoff wires of the cabling for pickoff open wire faults. The method further includes testing the first pickoff wires and the second pickoff wires for pickoff connection orientation faults if no pickoff open wire faults are determined in the first pickoff wires and the second pickoff wires. The method further includes testing one or more driver wires of the cabling for driver open wire faults. The method further includes testing the driver wires for a driver connection orientation fault if no driver open wire faults are determined in the driver wires.

Claims23

Dependent claims

A meter electronics (20) for detecting a cable fault in a cabling (205) of a flow meter (5), with the meter electronics (20) including a driver (204), first and second pickoff sensors (201a, 201b), and the cabling (205) coupled to the first and second pickoff sensors (201a, 201b) and to the driver (204), with the meter electronics (20) being characterized by:

a driver circuit (220) coupled to the cabling (205) and configured to generate a drive signal and communicate the drive signal into the cabling (205) and to the driver (204);
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 drive signal and determine one or more of a driver open wire fault and a driver connection orientation fault in one or more driver wires of the cabling (205).

A method for detecting a cable fault in a cabling of a flow meter, the method being characterized by:

testing one or more first pickoff wires and one or more second pickoff wires of the cabling for pickoff open wire faults, with the one or more first pickoff wires and the one or more second pickoff wires being included in the cabling and connecting to a first pickoff sensor and to a second pickoff sensor respectively;
testing the one or more first pickoff wires and the one or more second pickoff wires for a pickoff connection orientation fault if no pickoff open wire faults are determined in the one or more first pickoff wires and the one or more second pickoff wires;
testing one or more driver wires of the cabling for a driver open wire fault, with the one or more driver wires connecting to a driver;
and
testing the one or more driver wires for a driver connection orientation fault if no driver open wire faults are determined in the one or more driver wires.

2 more elements

Dependencies are inferred from the claim text.

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

Life of this patent

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

Life of this patent

Abstract

Claims23