The research work was based on development of low-cost terrameter instrument to measure ground resistivity and conductivity using schlumberger electrodes array method. The terrameter consists of inverter circuit, voltage multiplier, current limiting network, induced voltage measuring circuit, analog-to-digital converter, liquid crystal display, keypad and micro controller. The system has four electrodes array in schlumberger was tested on various soil type and different moisture level in the tropical terrain. The current and voltage measuring unit were calibrated using secondary standard method with available Mastech MS8210 meter. The keypad provided was used to enter space between the electrode at each measurement on the instrument to obtainthe soil resistivity and the soil conductivity automatically. The instrument can measure in both dry and wet soil. At wet soil the resolution is about is 0.01 Ω. The range is 0.1 Ω to 1 MΩ. The mean deviation from available terrameter or wet soil is ±0.1 and for dry soil is ±1.02.
Conductivity, Resistivity, Induced Voltage, Terrameter, Schlumberger Array
Ewetumo T. , Osinowo, M. O. , Ladipo K. D , Obagade T A , Familusi T O "Development Of Low Cost Terrameter" Iconic Research And Engineering Journals Volume 3 Issue 2 2019 Page 372-378
Ewetumo T. , Osinowo, M. O. , Ladipo K. D , Obagade T A , Familusi T O "Development Of Low Cost Terrameter" Iconic Research And Engineering Journals, 3(2)