a. Do not drop magnets (Figure 95).
Do not drop, hit, or jar (even slightly) a magnet because it will
greatly reduce the field strength. For example, if you drop the magnet or
tap it once with a screwdriver, its strength may be reduced by 50 gausses.
Since many magnetron magnets have an operating field strength of about 2,000
gausses, just a few taps will lower their field strength enough to prevent
proper operation.
Figure 95. Never Drop or Hit a Magnet.
b. Keep metal tools away from magnets.
Magnetron magnets are very powerful and attract metal tools even
when many inches away. Use nonmagnetic tools at all times when working near
magnets. But, if you must work near the magnet with a screwdriver, pliers,
or any metal instrument, be very careful. Get a firm grip on the tool you
are using, or it will be pulled to the magnet.
c. Do not wear a wristwatch near magnets.
Another thing to remember when working close to a magnet is to
remove your watch.
The strong field around the magnet may stop it from
running. Even if you have a watch that is not affected by the field, it may
be drawn to the magnet and broken.
d. Cover the magnet when drilling or filing.
If you must drill or file near a magnet, completely cover it with a
cloth or tape.
This precaution will prevent the filings from adhering to
the magnet.
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