Wenner 4-Pin Soil Resistivity & Multi-Rod Earthing Grid Mutual-Screening Solver (IEEE 80)

Deterministic Wenner 4-probe apparent resistivity rho = 2*pi*a*R + Dwight single-rod R_1 = (rho/(2*pi*L))*(ln(4L/r)-1) & Tagg/Schwarz multi-rod mutual-resistance screening factor engine (.json, .csv, .pdf) built for DEHN, OBO Bettermann, Sonel / Megger, Galmar — zero-upload ephemeral Wasm RAM execution.

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