Users’ Guide for Earth Ground Resistance Tester
Operation Instructions
Drive deep the Auxiliary Earth Bars P, C in straight line into the ground and ensure that the bars are between 5 and
10 meters apart. Connect ends of the test leads (black, red and green) , which respectively from the ports E, P, C,
separately to the object measured, auxiliary earth rod P and auxiliary earth C.
Attention: Drive the auxiliary rods where the earth is damp; in case that no other earth but clay, sand or
gravel, which are dry, are available, spray some water onto them to keep them damp; in case the measurement is
performed on a concrete floor, place the auxiliary earth rods horizontally and spray some water onto them or
cover them with damp cloth.
（2）Measurement of earth voltage
Earth voltage measurement should be done before measurement of earth resistance to check the amount of earth
voltage, as voltage more than 10 V is likely to cause larger error in the measurement of earth resistance. In this case, cut
the measured object from the power supply and wait until the earth voltage drop for another measurement.
（3）Measurement of earth resistance
Rotate the switch to 3 POL position, press down the key of MEASURE to start the measurement, with the key LED
turned on and glittering. When the measurement comes to the end automatically, the buzzer will give a sound, the key
LED will go off and the data will be held automatically.
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