Features 3-Phase Energy Logger EU/US Version Key measurements: Automatically capture and log voltage, current, power, harmonics and associated power quality values. Fluke Connect® compatible*: View data locally on the instrument or via Fluke Connect mobile app and desktop software. Convenient instrument powering: Power instrument directly from the measured circuit. Highest safety rating in the industry: 600 V CAT IV/1000 V CAT III rated for use at the service entrance and downstream.