Numerical estimation of the field error of small single and double sheet testers

This paper deals with the research of a small single and a double sheet Tester with specimens of size 105 mm×52 mm. The aim of the research was to discover whether the small single or double sheet tester fulfils the requirement for satisfactory exactness of the magnetic measurements. The finite element method was used for the magnetic field study. The field distribution was calculated inside and outside the sample, and so the error was obtained. The study shows that small testers can be used for magnetic measurements of electrical sheets with acceptable accuracy