Feature:1. Earth resistance tester, in the measurement of a grounding system with loop current, does not require breaking down the grounding wire, and no need auxiliary electrode.2. With large LCD display screen, clear data, easy to read. Can test ground resistance and loop resistance test. It is safe, fast and simple in use.3. Widely used in the grounding resistance measurement of the power, telecommunications, meteorology, oilfield, construction and the industrial and electrical equipment.4. Increase sound and light alarm function, with "beepbeep beep" alarm sound and increase the interference signal recognition indicator function, with "beepbeepbeep" indicator.5. Earth resistance tester can measure the integrated value of the grounding body resistance and the grounding lead resistance.Specification:Item Type: Earth Resistance TesterMaterial: ABSColor: As shown in the pictureFunctionGround resistance test, loop resistance testPower Supply4x1.5V AA dry battery (not included)Resistance range0.01-1200Resistance resolution0.001Data storage99 groupsAlarm threshold setting rangeResistance: 1-199Sound-light alarm"Beep--beep--beep--" alarm sound, the alarm symbols flashes, press the AL button to turn on, off, and setInterference signal recognition functionBeep--beep--beep--" prompt sound, NOISE symbols flashesWorking temperature and humidity-20,-55, 10%RH - 90% RHLCD4-digit LCD digital display, length and width 47x28.5mm / 1.9x1.1inJaw size65x32mm / 2.6x1.3inMeter size286x87x56mm / 11.3x3.4x2.2in(L x W x T)Guard classDouble insulationStructureClamp CTShiftAutomatic shiftExternal magnetic field<40A/mExternal electric field<1V/mSingle measurement time0.5sResistance measurement frequency>1KHzFrequency of measured current50/60Hz automaticLow battery indicator functionWhen the battery voltage is lower than 5.3V, the battery voltage is lowStorage data full indication99 sets of stored data are full, and the "MEM" symbols flashesOver-range indicationOver-range indication "OL", "L0.01" or "OL A"Auto power-offThe meter will automatically shut down after about 5 and a half minutes after starting upPower consumptionStartup, working current is less than 50mA, continuous working for about 30 hours.Package List:1 x Earth Resistance Tester(Battery Not Included)1 x Measuring Ring1 x Aluminum Case1 x Instruction ManualNote:1. Please allow 12in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.