The Fluke 1577 Insulation Multimeter combines a digital insulation tester with a full-featured, true RMS digital multimeter in a single, compact, handheld unit. This versatile tool is ideal for troubleshooting and preventive maintenance of electrical systems, including motors, generators, cables, and switchgear. It offers insulation testing up to 600 MΩ and voltage measurements up to 1000 V, providing comprehensive testing capabilities in one device..