Grounding and Shielding

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Description

Instrumentation requirements force us to acquire analog and digital signals in a variety of environments and constraints.  Basic grounding and shielding concepts must be understood to select methodology that will ensure our signals are not corrupted by electrical noise. The integrity of data we measure and capture is vital from both a safety and cost viewpoint. This course addresses these considerations by explaining the reasons behind specific methodologies for grounding and shielding. Examples are given to reinforce the theory.  The concepts presented should be appropriate for anyone with a basic familiarity with electronics. The course covers the following topics as they relate to grounding and shielding while requiring minimal math skills:

         1.  Ground

        2.  Noise

        3.  Impedance

        4.  Fourier Transform (basic concept)

        5.  Common Mode and Normal Mode Signals

        6.  Ground Loops

        7.  Conducted Noise

        8.  Electro-Static Noise Sources (E-Field)

        9.  Magnetic Field Noise Sources (H-Field)

        10. Radiated (radio waves)

        11. Unusual Sources of Electrical Noise

        12. Cable termination

        13. Cable Shielding Methodology

        14. Counter-intuitive Effects (black magic)

 

Intended Audience

Anyone who designs, maintains, or installs electrical systems that measure or distribute instrumentation signals.  This includes engineers and technicians. The course is part of a series that leads to a JACMET Engineering Instrumentation Certificate.

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