Greg McMillan AIChE Presentation on Wireless Measurement and Control Opportunities

by | Jul 25, 2011 | Industrial IoT, Services, Consulting & Training

Jim Cahill

Jim Cahill

Chief Blogger, Social Marketing Leader

Just about all plants have a few “blind spots” where instrumentation has not been installed due to cost, installation difficulty, or other hurdle.’s Greg McMillan is giving an AIChE virtual local section presentation, Wireless Measurement and Control-Opportunities for Diagnostics, Process Metrics, Inferential Measurements, and Eliminating Oscillations on August 25th at 10am EDT/ 14:00 UTC.

The abstract for this WebEx presentation is [hyperlink added]:

Wireless measurements reduce wiring installation and maintenance costs and eliminate electrical noise and ground loops. The portability of wireless transmitters offers opportunities to troubleshoot locations in the process with abnormal operations and to demonstrate process control improvements and online process and equipment metrics such as yield, reaction rate, energy use, and fouling. The PIDPlus in DeltaV v11 has enhancements that deliver the following benefits in control applications:

  • Inherent prevention of process oscillations from update delay, sensitivity limits, and failures that are observed when a traditional PID is used for wireless measurements, analyzers, and sticky valves.
  • Reduction of the integrated absolute error (total error) and peak error (maximum error) for unmeasured load disturbances when the update time is significant compared to the process response time. For set point changes, the overshoot, rise time (time to reach setpoint), and settling time are decreased.
  • Standard tuning for maximum load rejection may be applied independent of the measurement update time whereas the traditional PID requires special detuning to stabilize the loop for large update times.

Greg was kind enough to send me a preview of his presentation. Here are a few highlights I gleaned. Opportunities for wireless temperature measurement include:

  • Finding a distillation column control point with the largest and most symmetrical change in temperature with reflux/feed or steam/feed ratio
  • Heat transfer coefficient metrics (fouling and frosting)
  • Combined with differential pressure measurement for packed absorber and distillation column hot spot and flow distribution analysis and control
  • Combined with flow measurement for control of reaction rate and crystallization rate from heat transfer (BTU/hr measurement and control)
  • Combined with differential pressures for fluidized bed reactor hot spot and flow distribution analysis and control
  • Combined with flow measurement to debottleneck coolant systems

Greg McMillan AIChE Presentation on Wireless Measurement and Control OpportunitiesHe shares additional opportunities with wireless pressure measurement, pH, and conductivity measurement. The presentation is filled with examples where these wireless measurements have been applied and how the advanced PID responds to input from wireless devices.

Greg continues to share his vast wealth of process control expertise in events like this one and in his area on the blog.

Follow Us

We invite you to follow us on Facebook, LinkedIn, Twitter and YouTube to stay up to date on the latest news, events and innovations that will help you face and solve your toughest challenges.

Do you want to reuse or translate content?

Just post a link to the entry and send us a quick note so we can share your work. Thank you very much.

Our Global Community

Emerson Exchange 365

The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.

PHP Code Snippets Powered By :