for the computer controlled
measurement of magnetization curves
of hard magnetic materials
B-H Curve Tracer
The PERMAGRAPH® is the world-wide known standard equipment for the measurement of magnetic characteristics of permanent magnets in research, development, quality control and production.
The PERMAGRAPH® C is an automatic computer controlled precision version of this measuring instrument. Equipped with two Electronic Fluxmeters EF 5 and the high performance software package PERMA it facilitates quick and reliable measurements. The PERMAGRAPH® C will meet your present and future requirements. Our instruments are known for quality and long lifetime.
The system design conforms to the standards IEC 60404-5, ASTM A977/A977M and DIN IEC 60404-5 (replacement for DIN 50470, DIN EN 10332). The temperature upgrade conforms to IEC 61807TR and DIN IEC 68/190/CDV. The equipment has been optimized over many years and has been made specifically to meet the requirements of our customers.
Among others, the following measurements are possible:
Automatic measurement of the hysteresis loops of permanent magnets
Determination of material properties like remanence, coercivity, maximum energy product, etc.
Measurements at temperatures up to 200 °C with heating poles and temperature surrounding coils
Measurements with pole coils on the surface of magnets
Magnet-Physik has more than 65 years of experience in making measuring instruments for the characteri-zation of magnetic materials.
2- or 4-quadrant hysteresis loop
Recoil curves or inner (minor) loops, automatically or manual
BH = const. hyperbolas
B = 0 line
Remanence (Br or Jr)
Coercivity of J(H) curve HcJ (intrinsic coercivity)
Coercivity of B(H) curve HcB (normal coercivity)
Maximum energy product (BH)max
Maximum field strength Hmax
Maximum polarization Jmax, Br/Jmax ratio
Hk: knee shape parameter (H coordinate of J(H) curve for B = 0.9 · Br)
Hx: H coordinate of J(H) curve for B = x · Br
HD5 and HD2 results
Tables of J(H) and B(H), where H are user defined field strengths
Tables of H(J) and B(J), where J are user defined polarizations
Tables of H(B) and J(B), where B are user defined flux densities (inductions)
User values for tables can be predefined and stored. The corresponding functional values are automatically interpolated.
Output of specimen and measurement parameters and calculated results to ASCII text files, Microsoft Excel® worksheets (xlsx) or Microsoft Excel® xml spreadsheets
Output of sample and measurement parameters and calculated results to databases
Temperature correction: conversion of results by means of temperature coefficients of Br or HcJ
Microsoft Excel®, a SQL server and a PDF writer are not included.