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Process variable transmitter with two-wire process control loop diagnostics
US9182256B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9182256-B2 |
| Application number | US-83234110-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 8, 2010 |
| Priority date | Jul 9, 2009 |
| Publication date | Nov 10, 2015 |
| Grant date | Nov 10, 2015 |
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Abstract
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A two-wire process variable transmitter for use in an industrial process, including a process variable sensor configured to sense a process variable of a fluid of the industrial process. Output circuitry is configured to provide an output on a two-wire process control loop which is related to the sensed process variable. Loop current measurement circuitry measures a loop current flowing through the two-wire process control loop and terminal voltage measurement circuitry measures a voltage related to a terminal voltage of the process variable transmitter. The terminal voltage can be a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. Input circuitry is configured to receive a diagnostic command from the two-wire process control loop. A microprocessor configured to perform loop diagnostics on the two-wire process control loop based upon the measured loop current and terminal voltage in response to receipt of a diagnostic command from the two-wire process control loop.
First claim
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What is claimed is: 1. A two-wire process variable transmitter for use in an industrial process, comprising: terminals configured to couple to a two-wire process control loop; a process variable sensor configured to sense a process variable of a process fluid of the industrial process; output circuitry coupled to the terminals configured to provide an output on the two-wire process control loop which is related to the sensed process variable; current measurement circuitry c…
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Physics · mapped topic
- G01D21/00Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US9182256B2 cover?
- A two-wire process variable transmitter for use in an industrial process, including a process variable sensor configured to sense a process variable of a fluid of the industrial process. Output circuitry is configured to provide an output on a two-wire process control loop which is related to the sensed process variable. Loop current measurement circuitry measures a loop current flowing through…
- Who is the assignee on this patent?
- Wehrs David L, Lecuyer Gregory J, Lo Jessica, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification G01D21/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).