Fluke 434 User Manual download pdf (Page 43)

10-1

Chapter 10

Harmonics

Introduction

Harmonics measures and records harmonics and interharmonics (Fluke 434) up to the

. Related data such as DC components, THD (Total Harmonic Distortion), and K-

factor are measured. Harmonics are periodic distortions of voltage, current, or power

sinewaves. A waveform can be considered as a combination of various sinewaves with

different frequencies and magnitudes. The contribution of each of these components to

the full signal is measured. Readings can be given as a percentage of the fundamental, or

as a percentage of all harmonics combined. Results may be viewed in a Bar Graph

display, a table, or a Trend display. Harmonics are often caused by non-linear loads such

as DC power supplies in computers, TV’s and adjustable speed motor drives. Harmonics

can cause transformers, conductors, and motors to overheat.

Bar Graph Screen

To access to the Harmonics Bar Graph screen:

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Fluke 434 User Manual Page 43