② E port earth electrode
③ P port electric potential pole
④ C port current pole
⑤ V port voltage pole .
⑥ Function switch.
⑦ HOLD data holding switch
⑧ TEST testing button
⑨ POWER power indicator light (red)
⑩ OK operation indicator light (green)
a.Battery Voltage Inspection
b. 3-wire Earth Resistance Test
NOTE: maximum 50V voltage may be generated between E-C or E-P terminals when testing earth resistance
Please do not touch testing lead to avoid electric shock.
Please make sure testing wire plug insert in testing
terminal thoroughly before testing since loose connection may cause error in testing result.
1） Testing Wire Connection
As shown in picture below, punch assistant earth bar P1and C1 in earth 5 to10 meters distant from tested earth substance; connect green wire to terminal E, yellow wire to terminal P and red wire to terminal C2） Inspection of Power Supply and Wire Connection Press Test/Stop , POWER light off indicates insufficient 1.5V battery. Please replace it. OK light on indicates normal connecting of lead and E, C terminals, and auxiliary earth resistance is within permitted range. If light is off, check the lead connecting E and C terminals or change the position of earth bar, or water the land to lower auxiliary earth resistance to a proper level. Check breakage by short circuit of spring clamps of red and green lead . 3) Earth Voltage Measurement
Please turn the range select switch to earth voltage.Make sure the voltage value below 10V since error may occur to measuring value of earth voltage if the voltagevalue above 10V. At this point, one can break the power supply of tested earth electrode equipment to lower earth voltage and then measure the value 4) Earth Resistance Measurement First please press Test/Stop beginning from2000 . If the shown value is too small, switch to 200/20 and the shown value here is namely the tested earth resistance value. Note: make sure connecting wires separated during wire connecting since testing when testing leads wind about with each other may encounter mutual inductance to affect reading. The auxiliary earth resistance value may be too big and error may occur to show value. Make sure auxiliary earth bar P and C into wet land and complete contact of connecting parts.