EN/IEC 61000-3-2 harmonic analyzer evaluations

In the process of evaluating replacement equipment that meets the requirements of IEC 61000-3-2:2000/IEC61000-4-7:2002 and IEC 61000-3-3+A1/IEC 61000-4-15+A1, we put together an electronic load based on an old HP/Agilent verification process (HPET) and measured three vendors' harmonic analyzers. We saw significant and unacceptable variation in fluctuating harmonic emissions. To assist in getting a better understanding of the situation, we put together a round robin to evaluate multiple vendors' equipment using the HPET and a York EMC HFG01 (harmonics flicker generator). The HPET was tested at 120 V/60 Hz, the HFG01 at 230 V/50 Hz. Round robin participants were HP Roseville, CA; HP, Cupertino, CA; TUV Rhineland, Pleasanton, CA; UL, Santa Clara, CA; Intertek, Menlo Park, CA; Philips Medical Systems, Andover, MA; Austrian Research Center, Seibersdorf, Austria.. The paper reports on measurements made by multiple harmonic analyzers, seven were at other laboratories; the remaining were HP units or demonstration harmonic analyzers evaluated at HP Roseville. Two of the vendors' harmonic analyzers were used twice in the evaluations; their measurements' were similar.