AEMC 4630 Digital Ground Resistance Tester Kit - 500ft

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AEMC 4630 Kit-500ft

Price: $2,199.00

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Add AEMC Test Kit for 4-Point Testing w/ 300 ft. leads+$549.00

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The AEMC 4630 Digital Ground Resistance Tester performs ground resistance and soil resistivity tests.  This direct reading tester measures from 0 to 2000Ω, and is autoranging, so that it can automatically seek out the optimum measurement range.

Easy-to-use simply connect the leads, Press-to-Measure and read the results.  The large LCD (nearly 3/4" high characters) is easy-to-read, and also indicates low battery status, overrange and test lead shorts and lead reversals.  Three LED indicators on the front panel continuously warn the user of measurement problems to ensure accurate and reliable tests.

The AEMC 4630 Digital Ground Resistance Tester is fuse protected up to 250VAC against accidental connection to live circuits. In the event of a system fault, it can withstand 250VAC with spikes of 3000VAC or 1000VDC.

The heavy-duty field case is sealed against dust and water when closed.  The meter itself is self-contained within an inner case providing additional environmental and insulation protection. The test button is also sealed against the elements.

The AEMC 4630 is powered by 9.6V, 3.5 Ah NiMH rechargeable batteries. A built-in recharge circuit, powered from 120/230V 50/60Hz line, also provides
for testing while recharging and  will perform over 2000 15 second tests between recharging. 

The AEMC 4630 Ground Resistance Tester is a rugged, easy-to-use instrument ideal for maintenance crews performing numerous tests. The AEMC 4630 exceeds mechanical and safety specifications for shock, vibration and drop tests called out in IEC standards. Designed to reject high levels of interference, so it can be used under difficult conditions such as high stray currents that normally affect accuracy.

See the AEMC 4630 sister product, the AEMC 4620


  • Three-Point measurements of resistance to ground of ground rods and grids.  Three-Point measurements are generally used when the electrode or grid can be easily disconnected, if corrosion is suspected, or in circumstances where ground faults are unlikely to occur
  • Four-Point tests or soil resistivity measurements. Locating areas of lowest soil resistivity is essential for achieving an economical grounding installation
  • Touch potential measurements, an alternative to 3-Point tests in evaluating electrical safety. This test is recommended when the ground cannot be disconnected, where ground faults are highly likely to occur, or when the "footprint" of grounded equipment is comparable to the size of the ground to be tested.
  • Two-Point tests for continuity tests on bonding or on pre-established grounds. This test is commonly performed in urban environments where proper auxiliary electrode placement may be obscured by confined real estate. Measurements
    are referenced against a good local ground conductor.

Purchase the AEMC 4630 as a standalone unit or with the available kits below:

AEMC 4630 Kit -150ft - Digital Ground Resistance Tester Kit - 150ft
AEMC 4630 Kit -300ft - Digital Ground Resistance Tester Kit - 300ft

What's Included:

  • Meter
  • Battery
  • AC Power cord
  • User manual
  • Two - 500 ft color-coded leads on spools (red and blue)
  • Two - 100 ft color-coded leads (green and black)
  • One - 30 ft lead (green)
  • Four - 14.5" T-shaped auxiliary ground electrodes
  • One set of five spaded lugs
  • 100 ft tape measurer
  • And carrying bag.
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Full Review

  • Measures soil resistivity (4-Point) method
  • Measures ground resistance (2- and 3-Point) Fall-of-Potential method
  • Step voltage tests and touch potential measurements
  • Auto-Ranging: automatically selects the optimum range
  • Designed to reject high levels of noise interference
  • Extremely simple to operate: connect - press - read
  • LED on faceplate informs operator of high input noise, high auxiliary rod resistance and fault connections
  • AC powered with rechargeable NiMH batteries
  • Rugged, dustproof and rainproof field case
  • Can also be used for continuity tests on bonding
  • Color-coded terminals




    Range (Auto-Ranging 0 to 2000Ω)





    20.0 to 199.9Ω

    200 to 1999Ω




    Open Voltage

    ≤42V peak

    ≤42V peak

    Resistance Measurement Frequency

    128Hz square wave

    128Hz square wave

    Test Current




    2% of Reading 1ct

    2% of Reading 3cts

    Auxiliary Electrode Influence Max Res. in Current Circuit





    Max Res. in Voltage Circuit




    Rejects high levels of interference voltage (DC, 50 to 60Hz, harmonics): DC voltage in series with X: 20V; AC voltage in series with Y: 13V peak; AC voltage in series with Z: 32V peak

    Response Time

    Approximately four to eight seconds for a stabilized measurement

    Withstanding Voltage

    250VAC or 100VDC

    Power Source

    120/230V 50/60Hz Rechargeable 9.6V, 3.5 Ah NiMH batteries

    Battery Life

    >2000 15-second measurements; LO BAT indication on LCD

    Fuse Protection

    0.1A, 250V, 0.25 x 1.25"; 30kA Interrupt Capacity




    Color-coded terminals accept spade lugs with min. gap of 6mm or standard 4mm banana jacks


    10.8 x 9.7 x 5.0" (273 x 247 x 127mm)


    7.38 lbs (3.35kg)


    Heavy duty o-ring sealed field case

    Mechanical Shock

    IEC 68-2-27

    Vibration Test

    IEC 68-2-6

    Drop Test

    IEC 68-2-32

    Dielectric Test

    3kV, 50/60Hz

    Index of Protection

    O-ring sealed against dust and water to IP50 when case is closed



    Display Type

    3-1/2 digit, 0.71" (18mm) high; 2000-counts; electroluminescent blue backlight LCD also indicates over-range, test lead shorts and lead reversals

    LED Indication

    Three LEDs indicate high input noise, high auxiliary rod resistance, open leads, blown fuse



    Operating Temperature

    14 to 131F (-10 to 55C), 20 to 90% RH

    Storage Temperature

    -40 to 158F (-40 to 70C), 10 to 90% RH with batteries removed




    EN 61010-1, Cat. III, Pollution Degree 2

    Double Insulation


    CE Mark


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