Posted inNon Destructive Testing
Signal Filtering
Signal filtering is often used in eddy current testing to eliminate unwanted frequencies from the…
Posted inNon Destructive Testing
Reference Standards
In eddy current testing, the use of reference standards in setting up the equipment is…
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…
Posted inNon Destructive Testing
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…
Posted inNon Destructive Testing
Display – Complex Impedance Plane
Electrical Impedance (Z), is the total opposition that a circuit presents to an alternating current. Impedance, measured…
Posted inNon Destructive Testing
Bridges
The bridge circuit shown above is known as the Maxwell-Wien bridge (often called the Maxwell…