Standard Operating Procedure (SOP) for Earth Pit Resistance Measurement Fig - Earth Resistance Tester Wiring Objective To measure the earth pit resistance accurately using an Earth Resistance Tester. Equipment Required Earth Resistance Tester (with four terminals: P1, P2, C1, and C2) Two terminal rods (for current and potential measurement) Measuring tape Hammer (for driving rods into the ground) Procedure Step 1: Preparation Clean the Earth Pit Properly – Remove any debris or obstruction around the earth pit to ensure proper connection. Check the Earth Resistance Tester – Ensure the tester is in good working condition. The tester should have four terminals: P1, P2, C1, and C2 . Check if the pointer reads zero when the equipment is not in use. If required, adjust the zero adjustment screw to set the pointer at zero. Step 2: Connection Setup Short terminals P1 and C1 and connect them to the earth pit electrode whose resistance needs to be measured. Position the terminal r...
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