Test studies of some conventional CW EPR spectrometer settings

The results obtained on the examination of different instrumental parameter settings as well as the influence of the accuracy of sample positioning on the EPR parameters for two types of EPR spectrometers — Bruker ER 200D SRC and a portable PS 100.X — are reported. The results obtained show good agreement between the EPR signal parameters and relative values of the spectrometer settings. The reproducibility of the results on re-inserting of one and the same sample in the cavity was evaluated with and without a holder fixed in the cavity.