Computerized measuring system TMAG-RJJ-3.1 is designed to test and measure dynamic magnetic properties of soft magnetic materials for single strip electrotechnical steel, which has crystalline structure as well as amorphous.

Material measurements are realized in a special test circuits for samples with different dimensions in a frequency range from 10 Hz to 4000 Hz.

The measurements may also be done in another test circuits such as: toroidal sample, Epstein frame (standard or non-standard) and open sample in a polarization range depended on the type of material and parameters of test circuit. Presented system ensures performance capabilities in an aspect of ferromagnetic measurements.

The performance capabilities of the TMAG-RJJ-3.1 system ensure the measuring precision acquired for the unequivocal evaluation of influence technological process on magnetic properties of soft magnetic materials and for the unequivocal evaluation of material quality for both technological and structural applications. TMAG-RJJ-3.1 system is especially valuable as basic laboratory equipment for those companies, which are engaged in technology, production and utilisation of soft magnetic materials.


The TMAG-RJJ-3.1 system provides measuring and determination of the following magnetic characteristic:

»   peak value of field strength Hm [A/m]
»   effective field strength Heff [A/m]
»   coercive field strength Hc [A/m]
»   peak value of induction (polarization) Bm [T] (Jm [T])
»   effective induction (polarization) Beff [T] (Jeff [T])
»   remanence Jr [T] (Br [T])
»   specific core losses Ps [W/kg]
»   specific apparent losses Ss [VA/kg]
»   loss separation of:  
  • hysteresis losses
Ph [W/kg],
  • eddy-current losses
Pw [W/kg].
»   amplitudal relative magnetic permeability µA
»   differential relative magnetic permeability µr
»   peak factor of field strength kk
»   form factor of field strength ks
»   hysteresis loops family for different values of polarization and magnetic field strength  
»   anisotropy of induction (polarization) B [T]
»   anisotropy of losses A [%]
»   specific core losses of mixed sample Ps [W/kg]
»   magnetizability of mixed sample Jm [T]
»   signals of voltage proportional to the sample induction (polarisation) and current as a function of time with full description of the parameters for each data point  
»   signals of induction (polarization) and magnetic field strength as a function of time with full description of the parameters for each data point  
»   Fourier series distribution with full description and spectral lines diagram (for each measuring point) for function of magnetic field strength, induction (polarization), specific core losses, specific reactive losses and specific apparent losses with determination of deformation losses  
»   automatic mass measurement  
»   final setting of obtained results  


All of the above mentioned characteristics can be measured as a function of magnetic field strength or polarization in the range of:


»   frequency
  • resolution f = 0.01 Hz
(10÷4 000Hz)
  • z dokładnością nastawy
<= 0.1 %


»   magnetic field strength
(for Epstein frame 25cm 50/60 Hz)
  • setting accuracy <= 0.3 %
(5÷12 000A/m)
»   magnetyzacji
  • resolution J = 0.01 T
  • setting accuracy <= 0.1 %

It is also possible to perform researches for set tolerance values of:

  • Setting of the measuring quantity value,
  • Form coefficient.

Moreover the user can set the limitary value of magnetizing current.

The measurements can be performed in the whole or in the closely restricted measuring range with required value of magnetic polarization or magnetic field strength. The measurements may also be accomplished for defined values of magnetic polarization or magnetic field strength. Magnetic field strength or magnetic polarization can be independent variables in each case. The measurements are performed with preservation of sinusoidal signal of magnetic induction differential. The measurements can also be performed without preservation of sinusoidal signal of magnetic induction differential.

Demagnetisation of the sample can be omitted or included into the measuring procedure. The value of demagnetic field and time of demagnetisation can be determined by operator.

The whole measuring process as well as calibration procedure is fully automated. TMAG-RJJ-3.1 system provides the opportunity of a tabular and graphic presentation of the obtained data, which can be presented by means of monitor, printer or plotter with full description of measured object parameters. All of measurement results are stored in the hard disc.