ED-400M
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ED-400M Eddy Current Flaw Detector Special Features The Centurion NDT ED-400M is the rugged version of the ED-400. Housed in a deep drawn aluminum enclosure, this version is built to take just about any punishment that comes its way. The ED-400M is a patented, solid-state eddy current instrument that is superior in detecting cracks in ferro-magnetic material. It is relatively compact, lightweight and simple to set up and operate. The ED-400M is the perfect compliment or even as a replacement for magnetic particle inspection. • • • • • • • • Excellent sensitivity for magnetic crack detection-provides full scale deflection for 0.008” slot. Extremely high signal/noise ratio. Virtually ignores background magnetic permeability variations. Excellent lift-off compensation eliminates erroneous signals due to surface scale and coatings. Adjustable threshold circuit with audio and visual indicators. LED indicator on probe eliminates need to constantly check meter. Wide selection of interchangeable probes. Operates for 40 hours or more on a single charge. Includes standard reference block for checking instrument performance. Applications The Centurion NDT ED-400M eddy current unit is an electronic test device that will locate surface and near surface discontinuities in magnetic materials. Non-magnetic materials may also be tested. In magnetic steel products and materials, defects as small as 0.005" deep may be detected with ease, if they are open and normal to the surface. The ED-400M is widely used to compliment or replace magnetic particle inspection methods in many industries. Its size and features makes the ED-400M valuable for testing finished goods in foundries, crack detection in heat treat shops, manufacturing plants, steel mills, automotive plants...and wherever accurate data must quickly be obtained, so as to establish produ

The ED-400M utilizes the eddy current principle, wherein induced currents in the test part are affected by changes in homogeneity and uniformity. Variations in material conductivity, permeability and thickness are ignored due to special design features that are incorporated into the system. Discontinuities, such as cracks, laps or seams, will disrupt the eddy current pattern induced in the material, causing localized magnetic changes. These unbalance the instrument and create meter needle deflections. Initially, the balance controls are adjusted with the probe in air, so as to provide a...

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