a) Resistivity Measurement Tools Grounding<\/strong><\/p>\n To measure the grounding resistance value by: 2). Measurement prisoners by connecting grounding terminal E C1 to be measured, the terminal P2 to P and terminal C2 to R. Distance E – P – R is the same made \u200b\u200bin a straight line. Meters will provide a direct readout in custody and custody earthing calculated by the formula: 3). Wearing Earth Tester (analog) based on the potential price.<\/p><\/div>\n E (ground electrode) to be measured and the auxiliary electrode P and R auxiliary electrode is placed in a straight line to the electrode E. Volt meter will point to the potential E – P. According to Ohm’s law, the potential difference will be directly proportional to the earthing prisoners. Requirements that must be considered are:
\n1). Wearing a model four terminals (Methods Wenner) with swivel arm generator (DC).<\/p>\n<\/div>\n![\"clip_image001\"](\"http:\/\/www.tneutron.net\/blogs\/wp-content\/uploads\/sites\/10\/2015\/04\/clip_image001_thumb.jpg\" "\\"clip_image001\\"")
<\/a><\/div>\n
\n\u03c1 (Rho) = 2. \u03a0. a. R (ohm-m)
\nin which:
\n\u03c1 (Rho) = soil resistivity (ohm-m)
\na = distance between the electrode (meters)
\nR = resistance (ohms)
\n\u03a0 (Phi) = 3.14<\/p>\n<\/a><\/div>\n
\nSeen that prisoners enlarged with the position P farther away from the E, and the increase is rapidly reduced, and even at a certain distance from the E, the increase can be neglected because it is very small.<\/p>\n
\na). Electrode R to be quite far from the electrode E, so that the prisoners are not mutually closed area (over lap).
\nb). P electrodes should be placed outside the two regions prisoners, in this case placed on a flat area of the curve.
\nc). Electrode P must lie between the electrodes R and E, on the connecting line.<\/p><\/div>\n<\/a><\/div>\n