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Quartz watch in a magnetic field.......

Gadget · 3 · 918
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au Offline Gadget

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Quartz watch in a magnetic field.......
on: June 16, 2024, 04:42:39 AM
Just a little story about my first quartz watch (Seiko)....
After I finished my instrument making apprenticeship in Melbourne  Australia I worked in the R & D department at VDO instruments for 9 years making prototype instrument clusters for Ford, GM, Toyota and Nissan.

One day I went over to the factory to do some spot welding for a project, I was there for about ten minutes and returned to my desk in R & D.
I looked down at my new Seiko quartz watch and then looked at the clock on the wall..... my watch was at least 12 minutes fast, I checked the other clocks... yes, 12 minutes fast!

I reset my watch and went back to work including another trip to the spot welder in the factory..... you guessed it, my watch was fast again when I returned.
I walked over to the factory and used the spot welder while looking at my Seiko and there it was.... every time I pushed to foot switch the seconds hand went around one revolution per second!

The magnetic field from the spot welder interrupted the step motor in the quartz movement (making it a non-step motor).
From then on I didn´t wear my watch in the factory.

Hope everyone is having a good weekend, cheers, John
« Last Edit: June 16, 2024, 06:05:52 AM by Gadget »

us Offline Barry Rowland

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Re: Quartz watch in a magnetic field.......
Reply #1 on: June 16, 2024, 01:33:30 PM
John that's a great story!  Thanks for sharing this with us  :tu: :like:
Barry
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us Offline Farmer X

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Re: Quartz watch in a magnetic field.......
Reply #2 on: June 17, 2024, 02:19:29 AM
I had no idea a spot welder could mess with a watch so badly. Good call not wearing it to work anymore. Thanks for sharing the story!
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