Digital Clamp Meter Uses

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DC Clamp Meter Utility Tool
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• Ordinary Clamp meter measures AC current flowing
  in the conductor which reverses direction causing
  a dynamically changing magnetic field. However,
  in DC conductors, the current flows in a fixed
  polarity. Consequently, the magnetic field around
  the conductor is fixed and does not change.
  Hence, a conventional clamp meter will register
  no reading.

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• A DC digital clamp meter works on the thesis of
  the Hall Effect. The Hall Effect states that when
  a conductor carrying current is placed in a
  magnetic field, a potential is induced across the
  conductor, transverse to an electric current in
  the conductor and a magnetic field perpendicular
  to the current. It is caused as the charge
  carriers, electrons or holes, experience a force
  known as the Lorentz force and are pushed to the
  sides of the conductor.

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It has a sensor known as the Hall element. The
Hall element is subjected to the magnetic field
caused by the flow of current to be measured.
This causes a small voltage across the Hall
element. This voltage is amplified and measured.
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