Third measurement of compound A.3.(HF)CH2O (S) was performed in cell 5 m thin with gold electrodes and planar alignment. Sample was cooled from the isotropic liquid down to the room temperature. DC field was sequentially applied starting from 0 V up to 10 V. Measurements were done for every 0.1 degree. Results of real part of permittivity versus temperature for several DC fields (500 Hz… 2.5 MHz) are presented below with the comments. Figures: A, B, C, D, E, F show results for DC fields: 0, 1, 2, 3, 4, 5 V respectively.Figure A. Real part of permittivity versus temperature T for 12 measuring frequencies.Results for 0 V DC field.