Ten Most-Important EMC Problems/Issues and How to Correct Them:
10. ESD (electrostatic discharge) in Metal Enclosures and Failure Mode



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ESD (electrostatic discharge) in Metal Enclosures


Above: Illustration of the coupling of an ESD discharge to an electronic circuit for (a) metal enclosure with apertures and (b) plastic enclosure.

Failure Modes due to (electrostatic discharge)

 
Above: Direct discharge into circuit; Direct discharge into ground system; Indirect discharge



Solutions:

  • Common failure modes: change of instrument state (front panel control), CPU reset, instrument lockup, loss of data.
  • Use shielding, reroute cables, separate receptor circuits.
EMC Top Ten: 9   EMC Engineering


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Updated: Sunday, 2008-08-17 14:14 PST