Fluke-1651B-Multifunction-insulation-tester-FLUKE-FLUKE-1651B-This-everyday-tester-is-ideal-for-all-domestic-applications-covering-all-the-basic-needs-for-testing-to-the-17th-Edition-wiring-regulations-Part-P-of-the-building-regulations-The-Fluke-1651b-performs-tests-of-residual-current-activated-devices-RCDs-in-addition-to-the-primary-tests-of-voltage-frequency-continuity-insulation-resistance-loop-impedance-PSC-&-PFC-tests-it-uses-a-unique-&-patented-advanced-loop-measuremen