FIELD: nondestructive testing, specifically, evaluation of residual life of members and units of power engineering equipment. SUBSTANCE: according to invention magnetic permeability is found at various values of frequency of electric current exciting magnetic field in tested article. Decision on residual life of article is made by position of curve in graph of dependence of magnetic permeability on frequency. Gear for implementation of procedure has scanner coming in the form of ferrite U- or E-shaped core with primary and secondary windings. Primary winding is connected through load resistor, power amplifier and buffer amplifier to line input of sound map of computer. Secondary winding is connected to one channel of stereo input of above-mentioned map and mentioned load resistor is connected to another channel. EFFECT: increased accuracy in evaluation of residual life of articles made of ferromagnetic steels. 3 cl, 2 dwg
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