Fisher Controls International LLC

Carter Bill Cartwright

Brian J Burlage

Brian Joseph Burlage

Michel Ken Lovell

Mitchell Stephen Panther

Jordan E Mandernach

Clyde Thomas Eisenbeis

Randy Jerold Hall

Thomas Pesek

Ronald Burr

Mark Stiehl

Thomas Adam Brandau

Jim Anctil

Rickey Lee Osborn

Melissa R Niesen

James Anctil

Thomas A Brandau

Ronald Charles Burr

Mark Douglas Stiehl

Melissa Renee Niesen

Brian Burlage

An integrated controller configured to operate in a field includes a network interface module, one or more function modules, and an output module. The network interface module is configured to receive, from a remote host via a communication link, a setpoint for a process variable. The one or more function modules are configured to (i) receive a measurement of a process variable from a field device and (ii) execute logic for a control loop including the field device based at least in part on the measurement of the process variable and the setpoint for the process variable, to generate an output signal independently of the remote host, where the output signal is for controlling the field device. The output module is configured to directly apply the generated output signal to the field device.

Integrated process controller with loop and valve control capability

A liquid level control loop optimizer receives a selection of a vessel configuration and a variety of parameters specifying the vessel dimensions, the fluid type(s), and the flow parameters of the liquid level control loop. The optimizer also receives a selection of various valve and actuator options and determines a variety of available configurations based on the selected options. The optimizer simulates each of the available configurations under the conditions specified by the parameters, and determines control loop characteristics and/or properties based on the simulations. The optimizer may display and/or rank the various configurations to assist a user in selecting a configuration that best meets the requirements of the control loop.

Liquid level control loop optimizer

Example methods and apparatus to interface with a control a loop are disclosed. An example apparatus includes a loop controller to control a control loop, a sensor to provide a measurement value to the loop controller, a device controller to adjust a control device based on an output from the loop controller, and a loop interface to receive a set point value and send the set point value to the loop controller, wherein the loop interface is different from a host device communicatively coupled to the loop controller.

Methods and apparatus to interface with a digital control loop

Multiple-contact switches are disclosed. An example multiple-contact switch disclosed herein includes a double throw switch having a common terminal, a first throw terminal, and a second throw terminal, the common terminal being coupled to a reference; a first throw circuit coupled to the first throw terminal, the first throw circuit to output an open signal to a process control device when the common terminal is substantially in contact with one of the first throw terminal or the second throw terminal; and a second throw circuit coupled to the second throw terminal, the second throw circuit to cause the first throw circuit to output a close signal to the process control device when the common terminal is substantially in contact with the other one of the first throw terminal or the second throw contact terminal, wherein at least one of the open signal or the close signal corresponds to the reference.

Multiple-contact switches

A system and method for accurately measuring supply gas consumed by a particular process control component within a process control system is disclosed. Enhanced measurement accuracy is derived from measuring the consumption of the process control component in a normal operating mode of the process control system. The amount of fluid expended by one process control component is separated by a fluid control system from the amount of supply gas expended in actuating other process control components. The amount of fluid expended by each component may be determined by measuring a decrease in a fluid within a vessel having a known quantity that independently supplies supply gas to each component during its operation.

In situ emission measurement for process control equipment

A valve includes a fluid inlet passage having a fluid inlet, a fluid outlet passage, an orifice between the fluid inlet passage and the fluid outlet, and a moveable valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage. A movable valve stem is attached to the valve plug and a travel limiting device is attached to the valve stem. The travel limiting device permits the valve to be placed in one of a plurality of desired flow configurations.

Control valve flow adjustment device

Growing community of inventors

Ames, IA, United States of America

Carter Bill Cartwright