Design of digital resistivity-meter for subsurface exploration

Abstract

Subsurface exploration is continuously running like increasing energy demand. Many explorations using analog resistivity meter as the measurement tool. The problem faced by users when using this tool is the lack of time efficiency and a high measurement error. We have to write manually the data which is shown on display. From all current and voltage, only the maximum one is needed. So the user needs to pay high attention to data fluctuation. This research aimed to design digital resistivity meter using current sensor and microcontroller Arduino UNO. The data then converted and saved into an SD card. The user can easily operate the system from the dashboard and touchscreen display. The device was calibrated to analog resistivity meter Naniura NRD-300 which was sold commercially. We can get the comparison of usage, precision, and efficiency between the digital and analog resistivity meter from calibration. The results of the calibration will be discussed.