BS EN IEC 60404-3:2022

1   Scope

  This part of [IEC 60404](/search?q=IEC%C2%A060404)
   is applicable to grain-oriented and non-oriented electrical steel strip and sheet
  for measurement of AC magnetic properties at power frequencies. 
The object of this document is to define the general principles and the technical
  details of the measurement of the magnetic properties of electrical steel strip and
  sheet by means of a single sheet tester (SST). 
The single sheet tester is applicable to test specimens obtained from electrical steel
  strips and sheets of any grade. The AC magnetic characteristics are determined for
  sinusoidal induced voltages, for specified peak values of the magnetic polarization,
  for specific peak values of the magnetic field strength and for a specified frequency. 
The measurements are made at an ambient temperature of (23±5)°C on test specimens
  which have first been demagnetized. 

    NOTE  Throughout this document, the quantity "magnetic polarization" is used as defined
     in [IEC 60050‑221](/search?q=IEC%C2%A060050%E2%80%91221). In some standards of the [IEC 60404](/search?q=IEC%C2%A060404) series, the quantity "magnetic flux density" was used. 

In order to support the long-term reliability of the performance of this set up and
  to understand better the relationship between the Epstein method and the SST method,
  the informative Annexes B and C, respectively, have been included.