Wednesday, November 11, 2015

Well Grounded Knowledge for Industrial Control - Part One of Three

Drawing symbol for electrical ground connection
Drawing Symbol for Electrical Ground
I suspect that most control system techs have, at one time or another, come face to face with control or instrument behavior that seemed bizarre and intractable. Maybe strange behavior would come and go with no apparent explanation. Instruments or control equipment would work properly for a while, then inexplicably go south. You carefully observe illogical operation occurring without any apparent cause, and sorting it out proves to be very difficult. This is not a situation in which you want to find yourself as a service technician, operator, or vendor, particularly when process stakeholders, like your boss or customer, are observing your progress.

While many of these stories may illicit laughter when retold as history, at the time they are serious business and nobody is laughing. If you want to avoid these sweat stain inducng situations in your career, one subject on which you should be well versed is electrical grounding of your industrial process equipment and instruments. Whether a tech, vendor, or operator, solid basic knowledge about grounding principals and techniques will help you to assure the safety of personnel and equipment in your work area and keep instrumentation and controls operating as intended.

This first of three installments is shown below, expertly written by the engineers at Acromag, a world class manufacturer of I/O devices for industrial process measurement and control.  Part Two and Part Three will be published in successive posts. I recommend these white papers for all technical levels as newly acquired knowledge or refresher. This is subject matter that applies universally. Be sure to read Part Two and Part Three.

Application assistance is always available from knowledgeable sales engineers specializing in process measurement and control. The best solution to an application challenge will arise from a combination of your process mastery and the product knowledge and technical resources of your respected vendors.