Associated Research 293 Vibroground
Features:
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Self-contained synchronous vibrator, battery powered unit
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Capable of measuring earth resistivity or the true resistance to earth of man-made grounds
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Not affected by the resistance of the auxiliary probes or leads
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Stray AC or DC currents in the earth do not detract from its accuracy
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Four resistance ranges: 0 to 1 ohm, 0 to 10 ohms, 0 to 100 ohms, 0 to 1,000 ohms, 0 to 10,000 ohms
Applications:
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Four Electrode Method, for determination of average earth resistivity. The ranges provided in the instrument make possible accurate soil resistivity measurements from 0 to 1,915,000 ohms per cubic centimeter at 10 ft. or greater spacing
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Three Electrode Method, for the measurement of resistance to earth of man-made grounds, anode resistance, polarization effects
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Two Electrode Method, for the measurement of circuit resistance
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Available with ground rods & cable set