Friday, September 22nd, 2017
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Test for edge effect -ISO2360 2003
A simple edge effect test, to assess the effect of the proximity of an edge, consists in using a clean uncoated sample of the basis metal as follows. The procedure is illustrated in Figure B.1. Step 1 Place the probe on the sample, well away from the edge. Step 2 Adjust the instrument to read zero. Step 3 Progressively bring the probe towards the edge and note where a change of the instrument reading occurs with respect to the expectedRead More …
Eddy current generation in a metallic conductor
A.1 General Eddy current instruments work on the principle that a high frequency electromagnetic field generated by the probe system of the instrument will produce eddy currents in an electrical conductor on which the probe is placed. These currents result in a change of the amplitude and/or the phase of the probe coil impedance, which can be used as a measure of the thickness of the coating on the conductor (see Example 1) or of the conductor itself (see ExampleRead More …
D5 Creation