IEC/TR 62581:2010（E）描述了通过光学传感器和加速计测量电工钢单板试样（最好是500 mm长和100 mm宽）和爱泼斯坦条试样（IEC 60404-2中规定）磁致伸缩的一般原理和技术细节。这些方法适用于从任何等级的电工钢板和钢带上获得的试样。磁致伸缩特性是在正弦感应电压、指定的磁极化峰值和指定的频率下确定的。在23°C的环境温度下进行测量+/- 首次退磁的试样温度为5℃。

IEC/TR 62581:2010(E) describes the general principles and technical details of the measurement of the magnetostriction of single sheet specimens preferably 500 mm long and 100 mm wide and Epstein strip specimens, specified in IEC 60404-2, of electrical steel by means of optical sensors and accelerometers. These methods are applicable to test specimens obtained from electrical steel sheets and strips of any grade. The characteristics of magnetostriction are determined for a sinusoidal induced voltage, for specified peak values of magnetic polarization and for a specified frequency. The measurements are made at an ambient temperature of 23 °C +/- 5 °C on test specimens which have first been demagnetized.