Category Archive: Measurements

Oct
14

Control Using Wireless Measurements

Control Using Wireless Measurements

During the initial development of WirelessHart we began researching how to address control applications that use a wireless measurement and/or wireless actuator. To extend battery life a wireless transmitter may be setup to communication the measurement value much slower than the update rate of a wired installation. Also, when the transmitter supports Window communications (as …

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Oct
07

Addressing Control in the Presence of Process and Measurement Noise

Application of Kalman Filter in DeltaV

When a measurement used in a control application is characterized by a significant amount of process or measurement noise then to avoid taking control action on noise filtering may be applied in the transmitter or in the control system. However, when traditional filtering techniques are used it is necessary to increase the PID reset time …

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Feb
25

Identifying Transmitter Problems

Standard PID Parameters

One of the most obvious reasons for poor control utilization is a broken or unreliable transmitter or sensor. As addressed in Chapter 3 of Advanced Control Foundation – Tools, Techniques, and Applications, if the control system is designed to be consistent with the international function block standard, IEC 61804, the status attribute is always communicated …

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Jan
14

Evaluating Control System Performance

Process Control System

The operation of industrial process control systems often involves the control of multiple unit operations with hundreds of measurements and control loops, as illustrated below. Although these systems are designed to automatically archive operational data in an historian, it is time consuming to examine historical data to determine if there has been a change in …

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Dec
10

Foundation Book Promotional Kit

Foundaton Book Display

The single loop and multi-loop control techniques most often used in automating continuous and batch processes are addressed in the book Control Loop Foundation – Batch and Continuous Processes. Similarly, the advanced control techniques that are most often utilized in the process industry are addressed in the book Advanced Control Foundation – Tools, Techniques, and …

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Sep
24

Continuous Data Analytics

ContinuousDataAnalyticsFieldtrailProcess_Rev

One of the areas addressed by the DeltaV future architecture team over the last two years has been the research and development of on-line continuous data analytics for fault detection quality parameter prediction. This year a prototype of this capability is being tested at two plants in Texas and one plant in Canada. Lubrizol, Deer …

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Sep
17

Control Loop Foundation Class – Nov 5-9

9025 Class

I worked closely with Emerson’s education department to establish the class Control Loop Foundation (9025). This 4 ½ day class is intended primarily for people who are new to the process industry and process control. Approximately 30% of the class is dedicated to workshops in which the students get hands on experience working with the …

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Aug
20

IEC/ISA Meeting During ISA Automation Week

IEC accepted the U.S. National Committee’s offer to hold IEC/TC 65, SC 65A, SC 65B, SC 65C and SC 65E meetings during the weeks of 17-21 and 24-28 September 2012 at the Orange County Convention Center, Orlando Florida, USA. Subcommittee meetings are schedules the week before the start of ISA Automation Week. The plenary will …

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Jul
30

Boot Camp for New Employees

BookOutline

Courses required for an engineering degree are designed to provide the student with a sound technical foundation for work in industry. However, in most cases these courses do not address the terminology and common practices that an engineer must know to design, implement, checkout and commission a process control system. Universities can help bridge this …

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Jun
04

Control Loop Foundation Class

Facility2

It was my pleasure to co-teach with Darrell Dray the Control Loop Foundation class (9025) the week of May 21st, 2012. The class was held in Emerson Process Management’s Education Center located in Round Rock, TX – just outside of Austin, TX. This 4 ½ day class is based on the Control Loop Foundation book. …

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