Rancang Bangun Prototipe Alat Resistivitas Skala Laboratorium

ABSTRACT\ud In this thesis has been designed and made a tool to measure the resistivity of laboratory scale soil. The resistivity method is one of the geoelectric methods used to study the resistivity properties of layers of rock beneath the surface. In this research used Wenner and Wenner-Schlumberger configuration The working principle of this tool is with a power supply circuit that serves as a fixed DC voltage source with a 24 Volt output voltage and a maximum current of 500 MiliAmpere The current is read through a current multimeter and connected to the electrode. The result of the injection is then measured in voltage by a multimeter voltage. From the results of the study using resistors, the cross-sectional results with 100K?? K resistor shows the apparent resisitivity value of the two devices showing similarities in both configurations. In the experiments using sand medium, the measurement at each datum point has almost the same value. Similarly, the resisitivity of the wenner and Wenner-Schlumberger configuration results with similar resistivity devices. On each data that has been in inversion there is a smaller rms error for tools that are made compared to lab tools. And there is also a big difference to the resisitivity value of each data between the tools created with the lab tool