AEMC 6472 Multi-Function Ground Resistance Tester
Description
The AEMC 6472 Multi-Function Digital Ground Resistance Tester is a portable measurement instrument designed to measure Bond Resistance, Ground Resistance (with and without clamps), Soil Resistivity, Earth Coupling, Step & Touch Potential.
When used in combination with the AEMC 6474 GroundFlex Adapter (factory supplied product only), Power Transmission Tower and Tower Leg Ground Resistance testing is also available.
The AEMC 6472 measures from 0.01 to 99.99kΩ and is auto-ranging, automatically seeking out the optimum measurement range, test frequency and test current. The adjustable test frequency (either manual or automatic) from 40 to 5078Hz test voltage provides rejection of high levels of interference, allowing it to be used under difficult conditions such as the presence of high stray currents that normally affect accuracy.
Up to 512 test results can be stored in internal memory for later recall to the display or downloaded to a PC using DataView® software (included) for Automatic Report Generation, Automatic Fall-of-Potential Plot Generation, Frequency/Resistance Plots and much more.
Features
AEMC 6472 Applications
- 3-Point measurements of resistance to ground of ground rods and grids. 3-Point measurements are used when electrode or grid can be easily disconnected.
- 4-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation.
- Touch and step potential testing measurements. These tests are recommended when the ground cannot be disconnected, where ground faults are highly likely to occur, or when the “footprint” of grounded equipment (the outline of the part of equipment in contact with earth) is comparable to the size of the ground to be tested.
- 2- or 4-Wire tests for continuity tests on bonding or on grounding systems. Test is a DC resistive test using 250mA or more and is used to check bonding of all connection points on the ground system.
- Earth coupling measurement and display. Used to estimate the influence of two earth resistance systems that are not connected to each other.
- 3-Point Fall-of-Potential measurement
- 3-Point earth coupling measurement
- Manual or automatic frequency scan from 40 to 513Hz for test accuracy in electrically noisy environments
- Earth coupling testing
- Selectable test voltage 16 or 32V up to 250mA test current
- 4-Point soil resistivity measurement with automatic calculation of Rho and user selection of Wenner or Schlumberger test method
- 2- and 4-Wire DC resistance measurement (Bond testing) with automatic polarity reversal
- Ground Resistance with 2 clamps (no auxiliary rods)
- Ground Resistance of Pylons with the AEMC 6474 GroundFlex Adapter and GroundFlex sensors allow the system to measure leakage current and ground resistance of tower legs without disconnecting the overhead ground conductor.
- Includes DataView software for data storage, real-time display, analysis, report generation and system configuration
- Auto-off power management
- Automatic recognition of all electrode connections and their resistance value
- Stores up to 512 complete test results in internal memory
- Optically isolated USB communication
- Rechargeable NiMH batteries from wall charger or vehicle power
- Rugged dustproof and rainproof field
Specifications
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AEMC 6472 Specifications |
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ELECTRICAL |
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3-Pole Measurement |
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Range (Auto-Ranging) |
0.09 to 99.9k Ohms |
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Resolution |
0.01 to 100 Ohms |
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Test Voltage / Current |
Nominal 16 or 32 Volts RMS user selectable; Up to 250 milliAmps |
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Resistance Measurement Frequency |
41 to 5078 Hertz user selectable or automatic selection |
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Accuracy |
±2 percent of Reading + 1ct at 128 Hertz |
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Earth Coupling Measurement |
Yes |
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4-Pole Measurement |
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Range (Auto-Ranging) |
0.001 to 99.99k Ohms |
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Resolution |
0.001 to 10 Ohms |
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Test Voltage |
16 or 32 Volts user selectable |
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Resistance Measurement Frequency |
From 41 to 5078 Hertz selectable |
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Accuracy |
±2 percent of Reading + 1cts at 128 Hertz |
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NOTE |
4 Pole Measurement with 1 Clamp SR182 (same specification as the 4 Pole measurement) |
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2 Clamp Measurement |
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Range (Auto-Ranging) |
0.01 to 500 Ohms |
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Resolution |
0.01 to 1 Ohms |
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Frequency |
128, 1367, 1611, 1758 Hertz |
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Accuracy with SR182 |
±10 percent of Reading + 1cts |
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Accuracy with MN182 |
±20 percent of Reading + 2cts |
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Soil Resistivity 4 Pole Measurement |
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Test Method |
Wenner or Schlumberger selectable with automatic calculation of test results in Ohm-meters, Ohm-cm or Ohm-feet |
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Range (Auto-Ranging) |
0.01 to 99.99k ohms; P Max: 999kOhmsm (display in kOhmft is not possible) |
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Resolution |
0.01 to 100 Ohms |
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Test Voltage |
16 or 32 Volts user selectable |
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Frequency |
From 41 to 128 Hertz selectable |
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Accuracy |
±2 percent of Reading + 1cts |
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Earth Potential Measurement |
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Range (Auto-Ranging) |
0.01 mV to 65 Volt |
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Resolution |
0.01 to 10 mV |
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Accuracy |
±2 percent of Reading + 1ct at 128 Hertz |
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Frequency |
From 41 to 128 Hertz selectable |
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Accuracy |
2 percent of Reading + 1cts |
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External Voltage Measurement |
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Range (Auto-Ranging) |
0.1 to 65.0 Volts AC/DC – DC to 440 Hertz |
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Accuracy |
±2 percent of Reading + 1cts |
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Input Impedance |
1.2M Ohms |
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External Current Measurement |
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Range (Auto-Ranging) with SR182 |
0.01 to 40.0 Amps – 16 to 400 Hertz |
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Accuracy at 50 to 99Hz |
±5 percent of Reading + 2cts from 0.01 to 100mA; ±10 percent + 2cts from 0.1 to 40A |
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Range (Auto-Ranging) with MN182 |
0.01 to 9.99A – 16 to 400 Hertz |
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Accuracy at 50 to 99Hz |
±7 percent of Reading + 2cts from 0.01 to 100mA; ±15 percent + 2ctsfrom 0.1 to 10A |
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Resistance Measurement (Bond Testing) IEC 61557/4 |
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Measurement Type |
2 Pole (with lead resistance compensation) or 4 Pole (Kelvin sensing) user selectable |
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Range (Auto-Ranging) |
2 Pole 0.01 to 99.9k Ohms; 4-Pole 0.001 to 99.99k Ohms |
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Accuracy |
±2 percent of Reading + 2cts |
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Test Voltage / Current |
16 V dcdc (+, – or auto polarity); Up to 250mA max |
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Data Storage |
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Memory Capacity |
512 test results |
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Communication |
Optically Isolated USB |
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Automatic Report Generation |
Yes — Tabular listings, Fall-of-Potential plots and Frequency/Resistance plots |
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Power Source |
9.6 Volt rechargeable battery pack |
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Recharging Source |
110/220 50/60Hz external charger with 18Vdcdc, 1.9A output or 12 Volt vehicle power |
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MECHANICAL |
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Test Lead Connection |
4 millimeter recessed banana jacks |
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Mechanical Shock |
Per EN 61557 |
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Vibration Test |
Per EN 61557 |
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Drop Test |
Per EN 61557 |
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Dielectric Test |
3kV 50/60Hz |
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Dimensions |
10.7 x 9.76 x 5.12 inches 272 x 248 x 130 millimeters |
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Weight |
7.5 pounds (3.5 kg) |
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Case |
Polypropylene |
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Index of Protection |
IP53 with cover closed |
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DISPLAY |
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Display Type |
Custom 256 segment multi-line LCD |
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Backlight |
Blue electroluminescent |
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COMMUNICATION |
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Software |
DataViewgraphing, analysis and reporting software |
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ENVIRONMENTAL |
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Operating Temperature |
14 to 122 degrees F -10 to 55 degrees C) |
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Storage Temperature |
-40 to 158 degrees F -40 to 70 degrees C |
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SAFETY |
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Safety Rating |
EN61010-1 50V Cat IV, Pollution Degree 2 |
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Double Insulation |
Yes |
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CE Mark |
Yes |
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