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The Use of a Personal Computer to Extract Information from Pulsed Eddy Current Test
Figure 1
Figure 1
Figure 1 — Oscilloscope traces that are observed when a test probe designed to test tubes from the inside is used: (a) voltage across the field coil; (b) probe outside the tube; (c) probe inside the tube. The dotted line is obtained when the wall thickness is 1.78 mm (0.07 in.). The vertical scale is 0.2 V per division. The horizontal scale is 20 ms per division. The tube has an inner diameter of 12.7 mm (0.5 in.) and a wall thickness of 0.89 mm (0.04 in.).
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