Hioki 3196 - Flicker; IEC Flicker Meter and ΔV10 Flicker Meter

6.6 Flicker
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6.6.1 IEC Flicker Meter and ΔV10 Flicker Meter
A flicker meter is a device for measuring perceived instability in light
resulting from variations in lighting brightness and wavelength.
There are two types of flicker meters: the IEC flicker meter (UIE flicker
meter), which is based on the IEC standard; and the
ΔV10 flicker
meter, which is used primarily in Japan. Both types of flicker meter
observe fluctuations in voltage and display a numeric value as an
objective measure of flicker.
IEC Flicker Meter ______________________________________________
The IEC flicker function is based on international standard IEC61000-
4-15, “Flickermeter - Functional and design specifications”.
Functional diagram of the IEC flicker meter
RMS value Urms
The RMS voltage (Urms) that is used by the IEC flicker meter is calcu-
lated every half cycle.
Auto Gain
Controller
AGC
This circuit adjusts the input RMS voltage (Urms) to a constant level
without affecting the variable voltage component.
The circuit has a 60-second response time (the time over which the
fluctuation width changes from 10% to 90%) with respect to stepped
variations in Urms.
6.6 Flicker
Flicker analysis is not available when measuring 400 Hz.