Earth ground resistance and soil resistivity testing
The AEMC 4620 Digital Ground Resistance Tester performs earth ground resistance and soil resistivity tests. This direct reading tester measures from 0 to 2000Ω, and is auto-ranging, so it automatically seeks outs the optimum measurement range.
The Model 4620 is rugged, easy-to-use and is ideal for maintenance crews performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests specified in IEC standards. It is designed to reject high levels of interference, so it can be used under difficult conditions such as high stray currents that normally affect accuracy.
The Model 4620 is also available in complete Kits (150ft, 300ft and 500ft).
Features
- Ground Integrity Measurement
- Measures soil resistivity (4-Point)
- Measures ground resistance (2- and 3-Point) Fall-of-Potential method
- Step voltage tests and touch potential measurements
- Auto-Ranging: automatically selects the optimum resistance range and test current
- Designed to reject high levels of noise and interference
- Extremely simple to operate: connect/press/hold/read
- LED on faceplate informs operator of high input noise, high auxiliary rod resistance and faulty connections
- Large easy-to-read backlit display
- Battery powered (Model 4620)
- Rugged dustproof and watertight field case
- Colour-coded terminals
Specifications
- Range: 20 Ω 200 Ω
- Measurement Range: (0 to 19.99) Ω (20 to 199.9) Ω
- Resolution: 10 mΩ 100 mΩ
- Open Voltage: ≤ 42 V peak
- Measurement Frequency: 128 Hz square wave
- Test Current 10 mA 1 mA
- Accuracy ± 2 % of Reading ± 1 ct
- Max Res. – Current Circuit: 3 kΩ 30 kΩ
- Max Res. – Voltage Circuit: 50 kΩ
- Response Time: Approximately four to eight seconds for a stabilised measurement
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