Epstein frame

- the yoke of standardized measurement of magnetic properties of magnetically soft materials, especially el ectrical sheets. Epstein frame consists of a suitably arranged wi ndings: primary and secondary. Tested sample must be prepared as a set of sufficient quantity (of multiplicity 4) strips of material (steel or magnetic tape). When measuring, it is assumed that all magnetic flux is closed in the sample, whose cross section is considered constant along the entire perimeter.