Fluke 1654b multifunction installation tester fluke fluke 1654b the fluke 1645b multifunction installation tester verifies the safety of electrical installations in domestic commercial and industrial applications it can ensure that fixed wiring is safe and correctly installed to meet the requirements of iec 60364 hd 384 and all relevant local standards pefc psc and loop impedance are measured and displayed in parallel saves you more than 50 of test time compared to other loop testers a