Evaluate the trends; eliminate the doubt The Fluke 1555 insulation resistance tester kit offers digital insulation testing up to 10 kV in an industrial strength case; with all the heavy duty leads and clips you need. Plus; the Fluke Connect wireless app performs tests and collects data while you stay a safe distance away. Remote operation lets you spend as little time as possible in potentially hazardous zones. Real-time trending shows a live graph on your phone; rather than a hard-to-read set of changing values. And you can create reports quickly; simply using drag-and-drop – something you won’t find anywhere else. Learn more >> Fluke insulation testers can now conduct the entire range of test voltages specified in IEEE 43-2000 with a best in class; 3 year warranty and CAT IV 600 V safety rating. Other useful features: Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI) with no additional setup Guard system eliminates the effect of surface leakage current on high-resistance measurements Selectable test voltages in 50 V steps from 250 V to 1000 V; and 100 V steps above 1000 V CAT III 1000 V; CAT IV 600 V safety rating Warning function alerts the user that line voltage is present and gives the voltage reading up to 600 V AC or DC for increased user safety Measurements can be stored in up to 99 memory locations; with each location assigned a unique; user defined; label for easy recall Long battery life gives the user over 750 tests between charges Large digital/analog LCD for easy viewing Capacitance and leakage current measurement Ramp function for breakdown testing Resistance measurements up to 2 TΩ Timer settings up to 99 minutes for timed tests 3-year warranty