QuickField BH-curve permeability

QuickField uses normal BH magnetization curve model. In fully saturated material the BH-curve slope (differential relative magnetic permeability) should be equal to unity. This tool computes differential magnetic permeability for a given BH-curve using following equations:
B = μ * μ₀ * H, where
      μ₀=4*π*10^-7 - permeability of free space [H/m],
      μ - relative permeability of media,
      B - magnetic flux density [T],
      H - magnetic flux strength [A/m],

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The software is provided "as is" and the author disclaims all warranties with regard to this software including all implied warranties of merchantability and fitness. In no event shall the author be liable for any special, direct, indirect, or consequential damages or any damages whatsoever resulting from loss of use, data or profits, whether in an action of contract, negligence or other tortious action, arising out of or in connection with the use or performance of this software.