The Fluke 1732 / 1734 Energy Loggers are designed to measure the most critical three phase power parameters, the 1732 and 1734 can simultaneously log rms voltage, rms current, voltage, voltage and current THD, active power, reactive power, power factor, active energy, reactive energy, and more. With enough memory for more than a year of data logging, the 1732 and 1734 can discover which loads can be optimized to enable you to reduce your energy bill.