| REMOTE FIELD (RFT) |
Remote Field Testing (RFT) is
an electromagnetic test that
makes use of an AC excitation
source without any attempt at
tube magnetization or
saturation. The varying
magnetic field is affected by
the abnormalities of the
material. These changes in
the field are measured a few
tube diameters away from the
source.
an electromagnetic test that
makes use of an AC excitation
source without any attempt at
tube magnetization or
saturation. The varying
magnetic field is affected by
the abnormalities of the
material. These changes in
the field are measured a few
tube diameters away from the
source.
The RFT system actually
measures the primary
magnetic field strength that
exists at a given distance from
the exiter coil. That field
strength determines the
included voltage across the
pickup coil. That voltage,
expressed as a phase and
amplitude vector with respect
to the excitor coil, is
represented on an X-Y screen
in the standard format that
most Eddy Current
Technology technicians can
recognize. Through-
transmission is sometimes
used to describe the RFT
process. It implies that there
is a source of energy that
transmits "through" a medium.
measures the primary
magnetic field strength that
exists at a given distance from
the exiter coil. That field
strength determines the
included voltage across the
pickup coil. That voltage,
expressed as a phase and
amplitude vector with respect
to the excitor coil, is
represented on an X-Y screen
in the standard format that
most Eddy Current
Technology technicians can
recognize. Through-
transmission is sometimes
used to describe the RFT
process. It implies that there
is a source of energy that
transmits "through" a medium.
| RFEC: Click above to see details & diagram |
| Details |
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