Inter-Harmonics Power Analyzer Provides Certified Accuracy

The PM6000 power analyzer from Voltech has gained independent certification of accuracy for inter-harmonics measurements to IEC61000-3-2, the international product-compliance standard for current harmonic emissions. Working with the National Physical Laboratory in Teddington, U.K., Voltech devised a test regime to show that the PM6000 meets all the requirements of the standard, including accuracy, measurement methods and limit checking for product classes A, B, C and D. Until now, certification has only been available for normal harmonics at multiples of the fundamental frequency: 100 Hz, 150 Hz, 200 Hz up to 2000 Hz. The latest version of IEC61000-4-7 requires measurements of inter-harmonic amplitudes and specifies the precise method of analysis.