Back to results
US 7,018,800 B2Granted
Process device with quiescent current diagnostics
AssigneeRosemount Inc.
InventorsGarrie D. Huisenga, Randy J. Longsdorf
Life of this patent
Estimating the term…
Abstract
A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the sensed quiescent current.
Claims42
A process device for use on an industrial process control system, comprising:
- an electrical connection configured to couple to a process control loop;
- output circuitry configured to transmit data on the process control loop;
- a quiescent current sensor configured to sense quiescent current draw of the process device;
- and
- diagnostic circuitry configured to determine a diagnostic condition of the process device as a function of the sensed quiescent current.
2 more elements
A method of determining a diagnostic condition of a process device of the type used in industrial process control systems, comprising:
- coupling the process device to a process control loop;
- outputting data on the process control loop;
- monitoring quiescent current draw of electrical components of the process device;
- and
- diagnosing a condition of the electrical component of the process device based upon the monitored quiescent current.
2 more elements
Dependencies are inferred from the claim text.