... adapt to ground resistance tests of electrical installations (AC nominal voltage below 500KV, included auxiliary DC electrical ... methods to measure the resistance: Bi-pole AC, Bi-pole DC, Tri-pole, Quad-pole, Current clamp selection, Double-Clamp without ... batteries, rechargeable batteries and external power sourceSPECIFICATIONS:FunctionF1627KitAccuracy3-pole & 4-pole0.1Ω-30KΩ5%rdg+10dCurrent selection ...