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bjnicholls
journeyman
Reged: 05/28/08
Posts: 7
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Re: Skyscout Battery Sleeves?
08/25/09 01:32 PM
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The battery sleeves are mu metal. That's an iron-nickel alloy that's highly permeable to magnetic fields and they're installed to prevent magnetic interference from the field around the batteries themselves. Problem is, mu metal can become magnetized. My shields are now causing the magnet icon to be perpetually active and the device is no longer accurate. Take off the shields and the Skyscout works fine (as reported in other treads). My brother has access to a degaussing coil so I'm going to see if he can neutralize the field in these shields for me. I'll report back on what we find out. Seems like Celestron needs to offer replacement sleeves since they can become the very problem they're supposed to prevent. There are alternative field shielding materials. Mu metal can't be shaped without then requiring annealing in a neutral gas atmosphere - not something the average buyer can do at home.
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