Fluke 435 用户手册

12-1

Chapter 12

Flicker

Introduction

Flicker quantifies the luminance fluctuation of lamps caused by supply voltage variations.

The algorithm behind the measurement meets EN61000-4-15 and is based on a

perceptual model of the human eye / brain sensory system. The Analyzer converts

duration and magnitude of voltage variations into an ‘annoyance factor’ caused by the

resulting flicker of a 60 W lamp. A high flicker reading means that most people would

find the luminance changes irritating. The voltage variation can be relatively small. The

measurement is optimized to lamps powered by 120 V / 60 Hz or 230 V / 60 Hz. Flicker

is characterized per phase by the parameters shown in a Meter screen. The related Trend

screen shows the changes in all measuring values in the Meter screen.

Note

After you have switched to Flicker, a settling time of about 10 seconds will

pass before the measurement is started. During this time the U (Unstable)

symbol shows in the screen header. Moreover the timer counts down from –

10 seconds. Flicker measurement has no unstable period when used with a

timed start.

Meter screen

To access the Flicker Meter screen:

MENU