introduction_to_process_control_from_instrumentation_process_control.pptx

Digital communication systems are
becoming more complex as technology
evolves. If this trend continues, the work
of instrumentation and control personnel
may be divided into two categories. The
first category is instrumentation and control applications related to the process, and
the second category is the application and
support of digital communications. These
require different skill sets. The true experts
of the future will be those who are able to
master both areas of knowledge.

1. Basic PowerPoint ® Presentations Basic PowerPoint ® Presentations offer instructors a no-cost option for providing a brief overview of content presented in Instrumentation Process and Control . Premium PowerPoint ® Presentations allow instructors to minimize development time by taking advantage of prepopulated instructional content including the following: Premium PowerPoint ® Presentations can be purchased from atplearning.com as part of the Instructor Resources or as a separate product. To purchase Premium PowerPoint ® Presentations , visit atplearning.com Chapter Objectives Images of all Numbered Figures Instructor Notes Chapter Reviews

2. Chapter 2 Process Control • Variables • Automation • Control Elements • Performance Characteristics • Control Loops • Common Control Strategies • Instrument Calibration • Instrument Management Software Fundamentals of Process Control

3. Process automation refers to processes involving batch and continuous flow of liquids, gases, and bulk solids.

4. Factory automation refers to processes usually involving the piece flow of product.

5. A process control system uses a primary element, a control element, and a final element.

6. Static characteristics are the characteristics of an element that describe the operation of the element at steady-state conditions when the process is not changing.

7. Dynamic characteristics are the characteristics of an element that describe the operation of the element at unsteady-state conditions when the process is changing.

8. Hysteresis is the property of a control element that results in different performance when a measurement is increasing than when the measurement is decreasing.

9. A control loop is a control system in which information is transferred from a primary element to the controller, from the controller to the final element, and from the final element to the process.

10. ON/OFF control is a control strategy where a controller activates or deactivates the final element depending on whether the measured variable is above or below the setpoint.

11. Proportional control is a control strategy that uses the difference between the setpoint and the process variable to determine a control output that is sent to a final element.

12. A time proportional ON/OFF controller is a control strategy that has a predetermined output period during which the output contact is held closed (or power is ON) for a variable portion of the output period.