Hioki PW3198 - Page 248

Appendix 5 Detailed Explanation of IEC Flicker and DV10 Flicker
A
20
V10 flicker The V10 flicker function is calculated using the "perceived flicker curve" calcu-
lation method, which is based on digital Fourier transformation.
Calculation:
V10 =
Vn : RMS value [V] for voltage fluctuations in frequency fn.
an : Luminosity coefficient for fn where 10 Hz is 1.0.
(0.05Hz to 30Hz)
Evaluation period: for 1 minute
V10 flicker
function diagram
V10 Perceived
flicker coefficient
V10 Flicker Meter
a
n
V
n

2
n1=


A/D
con-
ver-
sion
Waveform
data
Voltage
waveform
Squar
e mul-
tiplier
RMS
calculation
1-wave
RMS value
RMS value
averaging
RMS 1-minute
average value
Storage
1-minute
voltage
fluctuation
data
V10
calcula-
tion
100 V
conver-
sion
V10
V10
Luminosity
coefficient
Frequency [Hz]