FLICKER

Why are the Ranger Power Masters the best analyzers for measuring and analyzing Flicker? Rangers calculate and record the Instantaneous Flicker Sensation, Short Term Perceptibility, and Long Term Perceptibility. (These are known as Pfs, Pst and Plt respectively.)

A Pfs measurement of 1 is the point at which 50% of the human population becomes aware of the flicker. A Pst of 1 describes the point at which 50% of the population actually becomes irritated by the flicker while Plt indicates the irritation caused by irregular flicker effects over a longer period. In Ranger PM Products all three parameters are derived using the IEEE 1453 and IEC 61000-4-15 model for human behavior.

The measurement process meets all the Flicker Tests specified in both Standards, and in addition meets the linearity tests being proposed by CIGRE for the highest class of instruments.