02-12-2016, 09:10 AM
Har lige brug for forståelsen omkring at uret er beskyttet til 4,800 A/m
Gælder det ikke kun for automatiske ure, hvor der sidder mekanik der kan påvirkes af dagligdagens møde med magneter i form af telefoner, iPads osv.
Dette ur er jo i sig selv opbygget af elektronik mere end det er mekanisk ??
jeg søgte på nettet omkring det magnetiske og fandt dette:
A watch can be considered anti-magnetic if it can run within a 30 seconds per day deviation while housed inside a magnetic field of 4,800 A/m. And while that sounds like a lot, consider that even a small magnet, like those found in your iPad cover, stereo speakers or computer monitor, can be enough to throw your fine timepiece out of whack by causing the hairspring to effectively “stick” to itself. Should you find your watch suddenly running wildly slow or fast, don’t despair. A watchmaker can easily de-magnetize it in minutes, returning it to proper working order.
For reference, here are the Amperes/meter ratings of some common magnets.
35 A/m – Earth’s magnetic field at its surface
4,000 A/m – a typical refrigerator magnet
8,000 A/m – a small iron magnet
5,500,000 A/m – an MRI machine
6,600,000 A/m – CERN Hadron Collider magnet
Gælder det ikke kun for automatiske ure, hvor der sidder mekanik der kan påvirkes af dagligdagens møde med magneter i form af telefoner, iPads osv.
Dette ur er jo i sig selv opbygget af elektronik mere end det er mekanisk ??
jeg søgte på nettet omkring det magnetiske og fandt dette:
A watch can be considered anti-magnetic if it can run within a 30 seconds per day deviation while housed inside a magnetic field of 4,800 A/m. And while that sounds like a lot, consider that even a small magnet, like those found in your iPad cover, stereo speakers or computer monitor, can be enough to throw your fine timepiece out of whack by causing the hairspring to effectively “stick” to itself. Should you find your watch suddenly running wildly slow or fast, don’t despair. A watchmaker can easily de-magnetize it in minutes, returning it to proper working order.
For reference, here are the Amperes/meter ratings of some common magnets.
35 A/m – Earth’s magnetic field at its surface
4,000 A/m – a typical refrigerator magnet
8,000 A/m – a small iron magnet
5,500,000 A/m – an MRI machine
6,600,000 A/m – CERN Hadron Collider magnet
Med venlig hilsen Michael
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