Inaccuracy of Short-Term Light Flicker ${P_{\rm st}}$ Indicator Measuring With a Flickermeter

This paper provides an analysis of the short-term light flicker indicator measuring inaccuracy. Due to the complexity of a flickermeter's signal path, a full analysis is practically impossible. With the use of a standard functional diagram and flickermeter's model equations, it has been possible to describe the most important reasons behind the measurement inaccuracy: reference value restoration inaccuracy, the discrepancy between the acquired filters' amplitude responses, and standard filter characteristics, the attenuation of the maximum signal values transmitted through internal filters cascade, and some difficulties with flicker-level statistical evaluation. With the help of the amplitude response, suggestions on sample rate selection for internal signals have been given.