The Fluke 43B Power Quality Analyzer performs the measurements you need to maintain power systems, troubleshoot power problems and diagnose equipment failures. All in a rugged handheld package. Combines the most useful capabilities of a power quality analyzer, Multimeter and scope. Calculates 3-phase power on balanced loads, from a single-phase measurement. Measures power harmonics, and captures voltage sags, transients and inrush current.