Fluke 1507 Digital Megohmmeter Insulation Resistance Tester Repetitive or hard-to-reach testing is easy with the remote test probe Live circuit detection prevents insulation test if voltage greater than 30-Volts is detected for added user protection Read measurements easily with large, backlit display Save both time and money with automatic calculation of polarization index and dielectric absorption ratio Make repetitive tests simple and easy with the 1507's Compare (Pass/Fail) function Repetitive or hard-to-reach testing is easy with the remote test probe Live circuit detection prevents insulation test if voltage greater than 30-Volts is detected for added user protection Read measurements easily with large, backlit display