The Metrel MI3121 SMARTEC Insulation / Continuity tester is designed for the verification, maintenance and periodic testing of electrical installations; PE conductors, main and supplementary PE connections, troubleshooting, insulation resistance, observation of insulation trends and insulation of control, signal, telecom wiring (50V, 100V) and is suitable for testing on CAT IV installations. The user is also able to get a PASS/FAIL evaluation of test results, which is accompanied by red and green indicator lights. This allows for use in dark conditions, making the MI3121 a versatile instrument for a range of environments. Equipped with an in-built charger and a magnetic holder for hands-free testing, the tester can collect a large amount of results which can then be downloaded via the optional A 1291 EuroLink PRO or A 1290 EuroLink PRO Plus software.