Magnetic Particle Testing · MT

Demagnetize with an AC Yoke

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1.0 G

Accept this demagnetization?

MT · After the Inspection

Take the magnetism back out

A part leaves MT still magnetized — bad for welding, machining and bearings. Three moves:

  1. Check: slide the field indicator to each end — the needle kicks + at one pole, − at the other.
  2. Demag: hold the yoke's trigger, touch the part, pull away slowly, let go past the line.
  3. Check again — and make the call.