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Commissioning Control Systems – Input Filtering
The method used to process analog inputs and outputs is unique to each control system. Also, controller and IO bus design influence how often measurement and outputs are updated and thus dictate the...
View ArticleTop Ten Limitations – Analyzers
Ultimately what we most need to know in each key process stream is the operating condition least measured; composition. We are largely flying blind. Neural networks and projections to latent structure...
View ArticleEffect of Mechanical Design – Pumps and Piping
The increasing emphasis on saving energy and capital costs can lead to pump and piping designs that inadvertently cause a severe loss of turndown in flow loops and a significant increase in noise ,...
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Top Twelve Mistakes in pH System Design
The extreme capability of the pH measurement and the broad spectrum of applications and process conditions create exceptional requirements for electrode design, mixing uniformity, control valve...
View ArticleChance of a Lifetime
We have the opportunity to hear the 3 most influential and knowledgeable technical leaders in industry give their assessment of the present state and future of our profession. This will be the first...
View ArticleReactor Cooling and Heating Systems – Part 2
Whether the secondary loop uses coil or jacket inlet or outlet temperature is often a matter of tradition for a particular company or process industry. The dynamic response of the cascade control...
View ArticleSecondary Flow Loops Offer a Primary Advantage
A secondary flow loop offers opportunities for feedforward control, identification of valve stick-slip and backlash, online metrics, diagnostics, rejection of pressure disturbances, linearization, and...
View ArticleHow to Succeed – Part 4
We continue this series with some helpful hints for control system design and implementation. This week we look at measurement location and selection. Since a control system deals with change, the...
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Monitoring Turbine and Compressor Operation
In January I posted a series of four (4) blogs that addressed the implement of an on-line compressor efficiency calculation. The example for this series was a compressor for a refrigeration system that...
View ArticleControl Using Wireless Devices – Namur’s Interest
Earlier this year, the Namur Working Group 4.15 invited Emerson and four other major manufactures of distributed control systems and wireless transmitters to present their activities and R&D work...
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Control Loop Foundation Class
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...
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Boot Camp for New Employees
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...
View ArticleIEC/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,...
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Control Loop Foundation Class – Nov 5-9
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...
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Continuous Data Analytics
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...
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Foundation Book Promotional Kit
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....
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Evaluating Control System Performance
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...
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Identifying Transmitter Problems
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...
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Addressing Control in the Presence of Process and Measurement Noise
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...
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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...
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