Without the software, you are left staring at numerical data on a small screen. With it, you become a power quality analyst.
Hioki is currently transitioning away from physical media (CDs/DVDs) toward digital-only delivery to reduce their environmental footprint. You can find the latest drivers and application software directly on the official Hioki Download Page Key Capabilities of the 3197 Application Hioki 3197 Software Download
If you purchased the unit second-hand, check the carrying case. Many used units still have the original CD-ROMs. If your modern computer does not have a disc drive, you can create an ISO image of the disc on an older PC and transfer it via USB. Without the software, you are left staring at