... Voltage Digital Insulation Tester FeaturesManual Insulation Resistance measurementPI(Polarization Index) and DAR(Dielectric Absorption Rate) functionSTEP voltage measurementTC(Temperature compensation) functionLOG record Insulation ... adjust(250V,500V,1KV,2.5KV,5KV)Fine adjust(250V~1KV step 25V,1KV~5KV step 100V)STEP mode:500V, ... 1.0kV,1.5kV,2.0kV,2.5kV 1.0kV,2.0kV,3.0kV,4 ...