ORO(L2F) Oil Dielectric Loss Tester I. Product i ntroduction The ORO (L2F) Dielectric Loss and Resistivity Tester is a high-precision integrated testing instrument designed and manufactured in accordance with the GB/T 5654-2007 standard "Measurement of Relative Permittivity, Dielectric Loss Factor and DC Resistivity of Liquid Insulating Materials." It is primarily used for measuring the dielectric loss factor and DC resistivity of liquid insulating media, such as insulating