AEMC 4630 4-Point Ground Resistance Tester
Description
The 4630 4-Point Ground Resistance Tester performs soil resistivity and ground resistance tests, and is powered by 9.6 Volt 3.5 Ah NiMH rechargeable batteries.
The rugged 4630 measures from 0 to 2000 Ohms, is auto ranging so it automatically finds the best measurement range, and is easy to use which makes it ideal for maintenance crews performing numerous tests. It exceeds safety and mechanical specifications for drop tests, vibration, and shock as specified in the IEC standards. The 4630 is engineered to reject very high levels of interference, making it ideal for use under harsh conditions such as high stray currents that adversely affect accuracy.
Features
- Measures soil resistivity with the 4-Point testing method
- Measures ground resistance with the 2-Point, 3-Point, and Fall of Potential method
- Step voltage tests
- Touch potential measurements
- Auto Ranging
- Designed to reject high levels of noise interference
- Very easy to operate just connect, press, and read
- LED in faceplate alerts the user of fault connections, high auxiliary rod resistance, and high input noise
- AC powered with rechargeable NiMH batteries
- Rugged rainproof and dustproof field case
- Continuity tests on bonding
- Color coded terminals
AEMC 4630 Applications
- The 4630 can be used for the following tests:
- 3-point measurements of resistance to ground of grids and ground rods. 3-Point measurements are usually utilized when the grid or electrode can easily be disconnected, if there is suspected corrosion, or circumstances where ground faults are unlikely to occur.
- Soil resistivity measurements or 4-Point tests. Finding areas of lowest soil resistivity is necessary to achieve a feasible grounding installation solution.
- 4-point tests
- Soil resistivity measurements.
Touch potential measurements (an alternative to 3-point tests in evaluating electrical safety). This test is preferred when the ground cannot be disconnected, where ground faults are very likely to occur, or when the “footprint” of grounded equipment is comparable to the size of the ground to be tested.
Specifications
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Specifications |
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Measurement Range |
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Range |
20 / 200 / 2000 Watts |
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Measurement Range |
0.00 to 19.99 Watts / 20.0 to 199.9 Watts / 200 to 1999 Watts |
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Resolution |
10mW / 100mW / 1W |
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Test Current |
10 / 1 / 0.1 mA |
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Accuracy |
±2 percent of Reading ± 1ct / ±3 percent of Reading ± 3cts |
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Auxiliary Electrode Influence |
Current Circuit: 200 Watts; Voltage Circuit: 2000 Watts / Current Circuit: 30 kW Voltage Circuit: 50 kW / Current Circuit: 50 kW; Voltage Circuit: 50 kW |
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Open Voltage |
<42 Volts peak |
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Resistance Measurement Frequency |
128 Hertz square wave |
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Interference |
Rejects high levels of interference voltage (DC, 50 to 60 Hertz, harmonics): DC voltage in series with X: 20 Volts; AC voltage in series with Y: 13 Volts peak; AC voltage in series with Z: 32 Volts peak |
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Response Time |
Approximately 6 seconds for a stabilized measurement |
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Voltage Withstand |
250 Volts AC with spikes of 3000 Volts AC or 1000 Volts DC |
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Power Source |
8 C cell batteries |
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Battery Life |
1800 15 second measurements |
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Fuse Protection |
0.1 Amp, 250 volts, 0.25 X 1.25 inch; 30 kA Interrupt Capacity |
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Mechanical Specifications |
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Display |
3-1/2, 0.71 inch (18 millimeters) high; 2000-count; electroluminescent blue backlight – LCD also indicates overrange, test lead shorts and lead reversals |
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Connection |
Color coded terminals accept lugs with min. gap of 6 millimeters or standard 4 millimeter banana jacks |
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LED Indication |
3 LEDs indicate high input noise, high auxiliary rod resistance, open leads, blown fuse |
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Operating Temperature |
14 to 131 degrees F (-10 to 55 degrees C), 20 to 90 percent RH |
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Storage Temperature |
-40 to 158 degrees F (-40 to 70 degrees C), 0 to 90 percent RH with batteries removed |
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Dimensions |
9.45 x 7.28 x 4.33 inches 240 x 185 x 110 millimeters |
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Weight |
7.75 pounds (3.5 kg) |
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Case |
Heavy duty o-ring sealed field case |
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Colors |
Case: safety yellow; Front panel: gray |
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Mechanical Shock |
IEC 68-2-27 |
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Vibration Test |
IEC 68-2-6 |
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Drop Test |
IEC 68-2-32 |
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Dielectric Test |
3 kV, 50/60 Hertz, 1 minute between four interconnected measuring terminals and any external metal ground |
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Environmental |
O-ring sealed against dust and water to IP50 |
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Safety Reference Specifications |
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Safety Ratings |
EN 61010-1, Cat. III, Pollution Degree 2, 42 Volts |
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Agency Approvals |
CE Mark |
