Various conventional measurement methods are used in soil resistivity measurements. In general, in all conventional methods, four measuring piles are nailed to the soil at different intervals on one line. Specially developed measuring devices are used for measurements at small intervals and voltmeter ammeter method is used for measurements at large intervals.

If a transformer or power station is to be built on any land, the first task is to determine the soil's self-resistance on that land. Measurements are usually performed using the Megger device. With this study, the shape and location of the grounding electrons to be connected to the grounding network to be installed under the substation or substation are determined. Where grounding electrodes are buried, it is very important that the specific resistance of the soil is very low and that it can also maintain this feature for many years. Therefore, specific resistance measurements should be repeated in the long term. Measurements should be made for at least five years in the summer and winter season on the land where the electricity installation will be established.

Soil specific resistance or specific soil resistance means the resistance of a cube of soil with essentially 1 meters on the edges. Resistance values ​​naturally vary from soil to soil. It is possible to make resistance measurements of all conductors in nature. In addition, these values ​​are generally constant. However, the soil gives different results because of the extremely variable variables. The flow through the soil passes through a large surface. Therefore, the current density in grounding systems is quite high. How deep the current will go into the soil depends entirely on the soil specific resistance. If the ground specific resistance is not too high, it is possible for the current to travel on the surface or deeply. In the meantime, soil specific resistance has a very close relationship with temperature and humidity. If the soil moisture content is high, its specific resistance decreases. Similarly, if the temperature is high, the specific resistance drops. Swamps are the soil with the lowest specific resistance. In swamps, resistance is around 30 ohms, on clay soils it is around 100 ohms and on stony soils it is around 3000 ohms.

Our company, within the framework of electrical safety examinationsconducts its specific resistance measurements in accordance with the relevant regulations, standards and test methods published by domestic and foreign organizations.