Tomographic 4.1, Eddy-current flaw detector

 

Eddy-current flaw detector (ECFD) Tomographic 4.1 is intended for detection of flaws like fatigue cracks on the surface of parts of nonmagnetic and ferromagnetic alloys.

Tomographic 4.1 ensures testing of flat and curved surfaces with up to 20 mm radius of positive and negative curvature.

Pencil-type eddy-current probe VTP-2-02 ensures operation within the frequency range of 1 to 10 MHz.

The set of cover tips allows testing of parts of materials with specific conductivity (0.4 – 40)*106 S/m.

Information on the current test point is presented by position of special cursor in the complex plane.

Change in the probe angle within 0-15° from normal line to the tested surface results in horizontal displacement of cursor in the complex plane with regard to the datum, while presence of flaw results in cursor displacement from horizontal line. Cursor path is highlighted on the instrument screen (Fig.1). Also, possibility of processing and visualization of sweep of A-scan type with subsequent storing in the archive is provided (Fig.2). Test results are documented by means of universal application NDT operator AWS.

Technical characteristics:

• detection of cracks with at least 3mm length and opening within 0.05 to 1mm
• angle of probe deviation from normal line to the tested surface is within 0 to 30°
• at Ra 1.25µm surface roughness, gap between probe and the tested surface does not exceed 0.5 mm
• minimal distance to the edge of tested article – 5mm

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