SUP5-PWR - BH-loop measurements -> Bs measurement too small values

Hello,
with magnetic measurement  SUP5-PWR licence, I always measure Bsat (600AT/m)  ~20% too small: 0,46Tp in stead of ~0,54T (supplier measurements with Iwatsu power analyser SY-8218). I use MSO54 / TPP0500B voltage probe together with TCP0030A current probe.  Cross sectional area, magnetic mean path and winding numbers of testing toroid had correctly been inserted in program. Self heating was taken into account - ferrite was close to room temperature. Measurement frequency 10kHz, material DMR95. Probes had not been deskewed (is this required?). I measure acc. method IEC 62044-3 high excitation. Windings had been biflar wounded.

Is there any TEK training available on SUP5-PWR magnetic measurements? Additionally. I always get 'hysteresis loss negative...' 

I hope for your help.

Best regards Sven

Here the summary of measurements attached

Best regards Svenb

Hi Sven,

Probes deskew might not affect the Bpeak measurement, but it most certainly does affect other measurements (especially around hysteresis and loss) so I would certainly suggest deskewing your probes before taking such measurement.

In terms of your measurement, I noticed the manufacturer does not list a tolerance range for saturation flux density. The waveform shape is also not mentioned  (a square wave might be worth a try).
Because of the above mentioned factors, and more, I would suggest talking with the manufacturer to get more information about the permitted tolerances for the saturation flux density of the material and on replicating the measurement setup.

Hello Afonso,

thank you for your suggestions! Usually supplier take sinusoidal waveform, but I'll try rectangular. The problem is, that the supplier had measured on toroids directly and I got some of them to crosscheck. So tolerances should not occur.

Best reards Sven