Iowa Industrial Moderated Newsgroup For Surplus Equipment > Manufacturing Equipment
> Grinders
> No Warranty
> Associated research earth tester - model 293 (complete)
Associated research earth tester - model 293 (complete)
Associated Research Model 293 Earth Tester
Complete with all accessories, including: Hard-Shell Carrying Case, Test Leads, Spikes, and Instruction Manual.
* Self-contained synchronous vibrator, battery powered unit
* Capable of measuring earth resistivity or the true resistance to earth of man-made grounds
* Stray A.C. or D.C. currents in the earth do not detract from its accuracy
* Not affected by the resistance of the auxiliary probes or leads
* 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
* 4-Point 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
* 3- Point Method, for the measurement of resistance to earth of man-made grounds, anode resistance, polarization effects
* 2-Point Electrode Method, for the measurement of circuit resistance
