AEMC 4630 Digital Ground Resistance Tester

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

Applications:

• 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
AEMC 4630 Kit -500ft - Digital Ground Resistance Tester Kit - 500ft


What's Included:

• Meter
• Battery
• AC Power cord
• User manual

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 20Ω; 200Ω; 2000Ω
Measurement Range 0.00 to 19.99Ω; 20.0 to 199.9Ω; 200 to 1999Ω
Resolution 10mΩ; 100mΩ; 1Ω
Open Voltage ≤42V peak;  ≤42V peak;  ≤42V peak
Resistance Measurement
Frequency 128Hz square wave;  128Hz square wave;  128Hz square wave
Test Current 10mA;  1mA;  0.1mA
Accuracy ±2% of Reading ± 1ct; ±2% of Reading ± 1ct; ±2% of Reading ± 3cts
Auxiliary Electrode Influence
Max Res. in Current Circuit 3kΩ; 30kΩ; 50kΩ
Max Res. in Voltage Circuit 50kΩ; 50kΩ; 50kΩ
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 battery pack
Battery Life >2000 15-second measurements; LO BAT indication on LCD
Fuse Protection 0.1A, >250V, 0.25 x 1.25"; 30kA Interrupt Capacity

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