Fluke 1587 insulation multimeter fluke fluke 1587 p the fluke 1587 insulation multimeter combines a digital insulation tester with a full featured true rms digital multimeter in a single compact handheld unit which provides maximum versatility for both troubleshooting and preventative maintenance p p whether you work on motors generators cables or switch gear this multimeter is ideally suited to help you with your tasks p fluke 1587 insulation multimeter