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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

AEMC 6472 Specifications

ELECTRICAL

3-Pole Measurement

Range (Auto-Ranging)

0.09 to 99.9k Ohms

Resolution

0.01 to 100 Ohms

Test Voltage / Current

Nominal 16 or 32 Volts RMS user selectable; Up to 250 milliAmps

Resistance Measurement Frequency

41 to 5078 Hertz user selectable or automatic selection

Accuracy

±2 percent of Reading + 1ct at 128 Hertz

Earth Coupling Measurement

Yes

4-Pole Measurement

Range (Auto-Ranging)

0.001 to 99.99k Ohms

Resolution

0.001 to 10 Ohms

Test Voltage

16 or 32 Volts user selectable

Resistance Measurement Frequency

From 41 to 5078 Hertz selectable

Accuracy

±2 percent of Reading + 1cts at 128 Hertz

NOTE

4 Pole Measurement with 1 Clamp SR182 (same specification as the 4 Pole measurement)
4 Pole Measurement with 1 Clamp MN182 (same specification as the 4 Pole measurement + 5 percent)

2 Clamp Measurement

Range (Auto-Ranging)

0.01 to 500 Ohms

Resolution

0.01 to 1 Ohms

Frequency

128, 1367, 1611, 1758 Hertz

Accuracy with SR182

±10 percent of Reading + 1cts

Accuracy with MN182

±20 percent of Reading + 2cts

Soil Resistivity 4 Pole Measurement

Test Method

Wenner or Schlumberger selectable with automatic calculation

of test results in Ohm-meters, Ohm-cm or Ohm-feet

Range (Auto-Ranging)

0.01 to 99.99k ohms; P Max: 999kOhmsm (display in kOhmft is not possible)

Resolution

0.01 to 100 Ohms

Test Voltage

16 or 32 Volts user selectable

Frequency

From 41 to 128 Hertz selectable

Accuracy

±2 percent of Reading + 1cts

Earth Potential Measurement

Range (Auto-Ranging)

0.01 mV to 65 Volt

Resolution

0.01 to 10 mV

Accuracy

±2 percent of Reading + 1ct at 128 Hertz

Frequency

From 41 to 128 Hertz selectable

Accuracy

2 percent of Reading + 1cts

External Voltage Measurement

Range (Auto-Ranging)

0.1 to 65.0 Volts AC/DC – DC to 440 Hertz

Accuracy

±2 percent of Reading + 1cts

Input Impedance

1.2M Ohms

External Current Measurement

Range (Auto-Ranging) with SR182

0.01 to 40.0 Amps – 16 to 400 Hertz

Accuracy at 50 to 99Hz

±5 percent of Reading + 2cts from 0.01 to 100mA; ±10 percent + 2cts from 0.1 to 40A

Range (Auto-Ranging) with MN182

0.01 to 9.99A – 16 to 400 Hertz

Accuracy at 50 to 99Hz

±7 percent of Reading + 2cts from 0.01 to 100mA; ±15 percent + 2ctsfrom 0.1 to 10A

Resistance Measurement (Bond Testing) IEC 61557/4

Measurement Type

2 Pole (with lead resistance compensation) or 4 Pole (Kelvin sensing) user selectable

Range (Auto-Ranging)

2 Pole 0.01 to 99.9k Ohms; 4-Pole 0.001 to 99.99k Ohms

Accuracy

±2 percent of Reading + 2cts

Test Voltage / Current

16 V dcdc (+, - or auto polarity); Up to 250mA max

Data Storage

Memory Capacity

512 test results

Communication

Optically Isolated USB

Automatic Report Generation

Yes — Tabular listings, Fall-of-Potential plots and Frequency/Resistance plots

Power Source

9.6 Volt rechargeable battery pack

Recharging Source

110/220 50/60Hz external charger with 18Vdcdc, 1.9A output or 12 Volt vehicle power

MECHANICAL

Test Lead Connection

4 millimeter recessed banana jacks

Mechanical Shock

Per EN 61557

Vibration Test

Per EN 61557

Drop Test

Per EN 61557

Dielectric Test

3kV 50/60Hz

Dimensions

10.7 x 9.76 x 5.12 inches

272 x 248 x 130 millimeters

Weight

7.5 pounds (3.5 kg)

Case

Polypropylene

Index of Protection

IP53 with cover closed

DISPLAY

Display Type

Custom 256 segment multi-line LCD

Backlight

Blue electroluminescent

COMMUNICATION

Software

DataViewgraphing, analysis and reporting software

ENVIRONMENTAL

Operating Temperature

14 to 122 degrees F

-10 to 55 degrees C)

Storage Temperature

-40 to 158 degrees F

-40 to 70 degrees C

SAFETY

Safety Rating

EN61010-1 50V Cat IV, Pollution Degree 2

Double Insulation

Yes

CE Mark

Yes

 

Standards

CISPR
CISPR 11
CISPR 14 - 1
CISPR 14 - 2
CISPR 14 - 2
CISPR 16 - 1
CISPR 16 - 2
CISPR 16 - 3
CISPR 16 - 4
CISPR 22
CISPR 24
IEC
IEC/TR EN 61000 - 1 - 1
IEC/TR EN 61000 - 2 - 1
IEC/TR EN 61000 - 2 - 3
IEC EN 61000 - 3 - 2
IEC EN 61000 - 3 - 4
IEC/TC EN 61000 - 3 - 5
IEC EN 61000 - 4 - 2
IEC EN 61000 - 4 - 3
IEC EN 61000 - 4 - 4
IEC EN 61000 - 4 - 5
IEC EN 61000 - 4 - 6
IEC EN 61000 - 4 - 7
IEC EN 61000 - 4 - 8
IEC EN 61000 - 4 - 9
IEC EN 61000 - 4 - 11
European
EN 50 081 part 1
EN 50 081 part 2
EN 55 011
EN 55 013
EN 55 014
EN 55 015
EN 55 020
EN 55 022
EN 55 024
EN 50 082 part 1
EN 50 082 part 2
EN 50 093
American
FCC Part 15
MIL-STD - 461E