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Operation Instruction
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 measure-
ment 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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