Analyze resistivity with Wenner or Schlumberger methods. Review corrections, conductivity, seasonal effects, and design quality. Make earthing studies easier with organized results and downloads.
| Location | Method | Resistance (Ω) | Main Spacing | Geometric Factor K | Apparent Resistivity (Ω·m) |
|---|---|---|---|---|---|
| Yard Section A | Wenner | 4.20 | a = 2.0 m | 12.5664 | 52.78 |
| Transformer Bay | Wenner | 6.10 | a = 3.0 m | 18.8496 | 114.98 |
| Boundary Strip | Schlumberger | 3.50 | AB = 20 m, MN = 2 m | 156.2942 | 547.03 |
Soil resistivity work usually starts with the apparent resistivity from a field resistance reading. The calculator first finds a geometric factor, then multiplies it by measured resistance.
Here, R is measured resistance in ohms, a is Wenner probe spacing, AB is current electrode spacing, MN is potential electrode spacing, and K is any user-supplied geometric factor.
The temperature line is a practical linear adjustment. It is useful for internal comparison, seasonal planning, and conservative design review when you already use a known project coefficient.
It shows how strongly soil opposes current flow. Lower values usually mean better grounding conditions, while higher values often require more electrode length, larger grids, or soil treatment during earthing design.
The Wenner setup is simple, fast, and widely used for field testing. Equal electrode spacing makes measurements straightforward and helps engineers compare apparent resistivity at different depths or locations.
Schlumberger is useful when large current electrode spacing is needed and moving the potential electrodes less often is convenient. It can be efficient for deeper investigation over longer test lines.
Not exactly. Field formulas usually produce apparent resistivity, which represents the measured response of the ground. Layered soil interpretation and full grounding studies require more detailed modeling and site analysis.
Soil moisture, temperature, compaction, and site conditions can change year-round. Adjustment factors help create a conservative design basis instead of relying only on one field reading from one day.
Conductivity is the inverse of resistivity. Higher conductivity means current flows more easily through the soil. It gives another way to compare grounding conditions between sites or test points.
Yes, it is a good screening and reporting tool. For final grid sizing, touch voltage checks, and fault performance, you should still complete a dedicated earthing design study.
Electrode spacing changes the effective depth and volume of soil being sampled. Larger spacing usually reflects deeper soil behavior, which can materially change the apparent resistivity result.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.