Basics
Coil (Probe) Design
The most important feature in eddy current testing is the way in which the eddy currents are induced…
August 24, 2021 · Prabhu TLBasics
Basics
Probes – Shielding Loading
One of the challenges of performing an eddy current inspection is getting sufficient eddy current field strength in…
August 24, 2021 · Prabhu TLBasics
Probes – Configurations
Probes – Configurations Eddy current probes are classified by the configuration and mode of operation of the test…
August 24, 2021 · Prabhu TLBasics
Absolute Probes
Absolute probes generally have a single test coil that is used to generate the eddy currents and sense…
August 24, 2021 · Prabhu TLBasics
Display – Analog Meter
Analog instruments are the simplest of the instruments available for eddy current inspections. They are used for crack…
August 24, 2021 · Prabhu TLBasics
Display – Complex Impedance Plane
Electrical Impedance (Z), is the total opposition that a circuit presents to an alternating current. Impedance, measured in ohms, may…
August 24, 2021 · Prabhu TLBasics
Bridges
The bridge circuit shown above is known as the Maxwell-Wien bridge (often called the Maxwell bridge), and is…
August 24, 2021 · Prabhu TLBasics
Resonant Circuits
Resonant Circuits Eddy current probes typically have a frequency or a range of frequencies that they are designed…
August 24, 2021 · Prabhu TLBasics
Eddy Current Instruments
Eddy current instruments can be purchased in a large variety of configurations. Both analog and digital instruments are available. Instruments…
August 24, 2021 · Prabhu TLBasics
Phase Lag
Phase Lag Phase lag is a parameter of the eddy current signal that makes it possible to obtain…
August 24, 2021 · Prabhu TL