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Direct resistance measurement: Earth resistance is measured by placing spikes into the soil at 5–10 meters apart and reading values directly in ohms.
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Measurement ranges: Standard models cover 0–20Ω, 0–200Ω, and 0–2000Ω; KM-1520A supports up to 0–4000Ω.
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Earth voltage measurement: Capable of measuring AC earth voltage (0–200VAC for KM-1520, up to 0–400VAC in higher models).
