The Extech DL150 is a True RMS AC voltage and current data logger. Data log up to 100,000 readings of TRMS AC Voltage (600) or Current (200 Amp) with a user programmable sample rate from 1 second to 24 hours. LCD displays time/date, current reading, min/max, and if the user settable high/low alarms have been exceeded. Readings can be downloaded to your PC via the USB interface. Featuring Normal, Peak, and Capture (user specified trigger level) recording modes.