. 2020 Nov 7;20(21):6361. doi: 10.3390/s20216361

Table 8.

RMS and frequency measurement results. Distorted voltage signal with 25 harmonics, f₁ = 50 Hz.

	Supply Values	Measured Value	Error	Maximum Error IEC 61000-4-30	Class A/S
RMS	231.47 (V)	230.70 (V)	0.33%	±0.5% $U_{d i n}$ ¹	S
Frequency	50.0 (Hz)	50.0000 [Hz]	0.0 (mHz)	±10 mHz	A

¹ $U_{d i n}$ is the declared supply voltage.