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, monitoring functions help track intermittent problems and power system performance, records two selectable parameters for up to 16 days, and measures resistance, diode voltage drop, continuity, and capacitance.