The Extech PQ3450-12-NIST is a 3-phase power analyzer/data logger capable of logging up to 30,000 sets of measurements in Excel® format on a removable SD memory card. It includes a large dot-matrix, built-in clock and calendar, and a backlit LCD with easy-to-use onscreen menu. It allows for full system analysis with up to 35 parameters. The adjustable Current Transformer CT (1 to 600) and Potential Transformer PT (1 to 1000) ratio allows for high power distribution systems. Users can log up to 30,000 reading on a removable SD memory card in Excel® format. There is a wide sampling rate range of 2 seconds to 2 hours. It includes NIST Certification.