Combines the ease of use of a DMM, the visual feedback of an oscilloscope, and the power of a harmonics analyzer in a single instrument. Ideal for testing power on three-phase systems or troubleshooting harmonics on non-linear loads. At the touch of a key, see volts, amps and watts displayed in your choice of waveform, bar graph or numeric values. True-rms readings assure accurate measurements on all loads, whether linear or non-linear. If youre testing power on three-phase, three-conductor systems with balanced loads. The Fluke 39/41B calculates a three-phase readout from a simple single-phase measurement. And when you need to troubleshoot harmonics, these test tools make it easy: they display harmonics to the 31st, measure power factor, K-factor, crest factor, and total harmonic distortion. The 41B Power Harmonics Analyzer features waveform, bargraph showing harmonic levels, and numeric values readout, display updates three times a second for a dynamic view of actual circuit conditions, measurement of rms, peak and total harmonic distortion (THD) for complex voltages and currents - with no manual calculations required, immediate readings of Power Factors, KVAR, Crest Factor, K-Factor, data storage for up to eight complete measurement sets, and communications with a serial printer or DOS® or Windows®-compatible computer.