The Extech PQ3450-30 is a three-phase power analyzer/data logger that can record up to 30,000 sets of measurements in Excel® format on a removable SD memory card. It features a big dot matrix display, a built-in clock and calendar, and a backlit LCD with an easy-to-use onscreen menu. It supports full system analysis with up to 35 parameters. The adjustable Current Transformer CT (1 to 600) and Potential Transformer PT (1 to 1000) ratio enables high-power distribution systems. Record up to 30,000 readings on a removable SD memory card in Excel® format. Sampling rates range from 2 seconds to 2 hours. Comes includes four voltage leads with alligator clips, three 3000 A current clamps, eight AA batteries, an SD card, a 100-240 V AC adaptor, and a case.