Martindale-EZ2500-Non-Trip-Earth-Loop-Tester-Martindale-EZ2500-p-The-Martindale-EZ2500-non-trip-earth-loop-impedance-tester-provides-safe-switch-free-operation-for-domestic-commercial-&-industrial-applications-p-p-The-simple-auto-test-sequence-makes-it-ideal-for-both-17th-Edition-testing-&-applications-where-confirmation-of-safe-earth-loop-impedance-values-are-needed-prior-to-installation-of-equipment-&-maintenance-The-auto-test-sequence-means-there-is-no-need-to-worry-about-sele