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The AEMC 3620 3-Point Ground Resistance Tester performs ground resistance measurement from 0.5 to 1000 ohm with speed and accuracy. The Model 3620 features three-terminal operation for fall-of-potential earth/ground resistance, and may also be used for 2-Point tests. The large 3.1" logarithmic scale is easy to read, with a separate marking for 25 ohm. A large Press-to-Measure button allows for easy measurements. A manual zero adjust is provided for accurate readings. Color-coded terminals are easy-to-use banana plug inputs and binding posts. Specifications. Types of Measurements: 2- and 3-Point. Display: Analog. Soil Resistivity Test: No. Measurement Ranges: 0.5 to 1000 ohm. Resolution 10 m-ohm. Test Current: 10 mA. Open Voltage: <= 24V peak. Operating Frequency: 128Hz square wave. Accuracy: 5% of Reading ± 0.1% scale length. Interference: rejects high levels of interference voltage (DC, 50 to 60Hz, harmonics).
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