Fieldnotes from Corporations’ Different Paths to Decarbonization The meter measures up to 1500 V dc, 1000 V ac, and up to 999.9 A dc or ac through the clamp jaw. The included iFlex flexible current probe extends ac current measurements up to 2500 amps. When measuring ac current, the iFlex probe can be twisted through extremely small spaces giving technicians access to cables that would otherwise be difficult or impossible to clamp a probe around. "The Fluke 393 FC delivers unparalleled safety and performance in 1500V dc environments, like solar energy," said Susan Isaac, product manager for the Fluke 393. "It was designed specifically to address the unique challenges solar technicians deal with every day and help them get their jobs done faster and safer."