... methods to measure the resistance: Bi-pole AC, Bi-pole DC, Tri-pole, Quad-pole, Current clamp selection, Double-Clamp without ... of Double-Clamp without auxiliary pole can quick test Ground loop resistance Quad-pole method can directly test Easy ... batteries, rechargeable batteries and external power sourceSPECIFICATIONS:FunctionF1627KitAccuracy3-pole & 4-pole0.1Ω-30KΩ5%rdg+10dCurrent selection method0.1 ...