DESIGN OF DC RESISTIVITYMETER INSTRUMENT BASED MICROCONTROLLER

• Main Author: Kusuma Rahman Hakim, Dana
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/64094
• Institution: Institut Teknologi Bandung

Geoelectric measurements are widespread and have many benefits. Some of them are natural resource exploration, minerals, archeology, groundwater exploration, agriculture and so on. The tool used in geoelectric exploration is a resistivitymeter. Resistivitymeter works by injecting current into the ground through the current electrode and then measuring it at the voltage electrode. Through the results of calculations with Ohm's law by taking into account the geometry factor, the resistivity value will be obtained. By looking at the resistivity value, it can be seen that there are anomalies that can be interpreted as mineral content, water, and so on in the measurement area. In this study, the manufacture of resistivitymeter refers to the sensitivity of current and potential difference. The ultimate goal of this research is the manufacture of a DC Resistivitymeter that can be controlled automatically or manually with the accuracy of the measurement values with existing instruments. The results of these measurements will then be compared with the Deko-86D, Sanwa-CD800a, and Rigol DM-3068 multimeters, and will be compared with existing geoelectric instruments, namely the Ministing. In laboratory scale measurements, the average voltage accuracy is 99.978% and the current accuracy average is 99.885% against the Rigol-DM3068 multimeter. In field-scale measurements, the average current accuracy is 99.087% and the average resistance accuracy is 99.068% for the Ministing geoelectric instrument.