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Posted inNon Destructive Testing
Impedance Matching
Eddy current testing requires us to determine the components of the impedance of the detecting…
Posted inNon Destructive Testing
Coil (Probe) Design
The most important feature in eddy current testing is the way in which the eddy…
Posted inNon Destructive Testing
Probes – Shielding & Loading
One of the challenges of performing an eddy current inspection is getting sufficient eddy current…
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Probes – Configurations
Eddy current probes are classified by the configuration and mode of operation of the test…
Posted inNon Destructive Testing
Absolute Probes
Absolute probes generally have a single test coil that is used to generate the eddy…
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Display – Analog Meter
Analog instruments are the simplest of the instruments available for eddy current inspections. They are…
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Display – Complex Impedance Plane
Electrical Impedance (Z), is the total opposition that a circuit presents to an alternating current. Impedance, measured…
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Bridges
The bridge circuit shown above is known as the Maxwell-Wien bridge (often called the Maxwell…
Posted inNon Destructive Testing
Resonant Circuits
Eddy current probes typically have a frequency or a range of frequencies that they are…
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Eddy Current Instruments
Eddy current instruments can be purchased in a large variety of configurations. Both analog and digital instruments…