A Conversation for An Introduction to Electromagnetic Compatibility

Older Engineers.....

Post 1


Nice article mate.

The 'Earth Loop' comment reminds me of trying to fix a snag about 15 years ago. A signal was being passed from a sonar to a frequency analyser printout, via a cable about 20 feet long which rang above the compartment deckhead. On testing the printer, a big black line appeared at 60Hz on the analyser, I earthed both ends of the cable and it disappeared. Unfortunately my boss at the time made me remove the earth at one end of the cable as I would 'introduce an earth loop and cause interference', once again we have a big 60Hz line. The problem was solved by replacing the whole cable (£££££'s in labour) with a new one - he never realised that the new one was fully earthed :O(

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Older Engineers.....

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