Ground resistance, harmonics, insulation
and transformer Testing

AEMC Products  AEMC Pricing

Model 4630
Catalog# 2130.44

Model 4630 Kit
Catalog# 2130.46

Features - Applications - Specifications

AEMC 4630 Digital Ground Resistance Tester

AEMC 4630 Digital Ground Resistance Testing Kit
The Digital Ground Resistance Tester Model 4630 performs ground resistance and soil resistivity tests. This direct reading testers measures from 0 to 2000Ω, and is auto-ranging, so it automatically seeks outs the optimum measurement range.

The Model 4630 is rugged, easy-to-use and is ideal for maintenance crews performing numerous tests. It exceeds mechanical and safety specifications for shock, vibration and drop tests called out in IEC standards.

It is designed to reject high levels of interference, so it can be used under difficult conditions such as high stray currents that normally affect accuracy. The Model 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.

 

 

The Model 4630 is also available in complete kit form, which includes the meter, 8 C batteries, two 300 ft color-coded leads on spools, two 100 ft color-coded leads, four 16" auxiliary ground electrodes, one 16 ft lead with Mueller clip, carrying bag, one 100 ft tape measure, one AC power cord, ground workbook and user manual

Features

  • 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

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.

Electrical Specifications

Measurement Range

Range Auto-Ranging 0 to 2000Ω 
Measurement Range 20Ω 200Ω 2000Ω
Resolution 0.00 to 19.99Ω 20.0 to 199.9Ω 200 to 1999Ω
Test Current 10mA  1mA 0.1mA
Accuracy ±2% of Reading ± 1ct  ±3% of Reading ± 3cts 
Auxiliary Electrode Influence Current Circuit: 200Ω; Voltage Circuit: 2000Ω  Current Circuit: 30kΩ; Voltage Circuit: 50kΩ  Current Circuit: 50kΩ; Voltage Circuit: 50kΩ 

 

Open Voltage: <42V peak
Resistance Measurement Frequency: 128Hz square wave
Interference: 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 6 seconds for a stabilized measurement
Voltage Withstand: 250VAC with spikes of 3000VAC or 1000VDC
Power Source: 120/230V 50/600Hz Rechargeable 9.6V, 3.5 Ah NiMH batteries
Battery Life: 1800 15-second measurements
Fuse Protection: 0.1A, 250v, 0.25 X 1.25"; 30kA Interrupt Capacity

Mechanical Specifications

Display: 3-1/2, 0.71" (18mm) high; 2000-count; electroluminescent blue backlight - LCD also indicates overrange, test lead shorts and lead reversals
Connection: Color-coded terminals accept lugs with min. gap of 6mm or standard 4mm banana jacks
LED Indication: Three LEDs indicate high input noise, high auxiliary rod resistance, open leads, blown fuse
Operating Temperature: 14° to 131°F (-10° to 55°C), 20 to 90% RH
Storage Temperature: -40° to 158° F (-40 to 70° C), 0 to 90% RH with batteries removed
Dimensions: 9.45 x 7.28 x 4.33" (240 x 185 x 110mm)
Weight: 7.75 lbs (3.5kg)
Case: Heavy duty o-ring sealed field case
Colors: Case: safety yellow; Front panel: gray
Mechanical Shock: IEC 68-2-27
Vibration Test: IEC 68-2-6
Drop Test: IEC 68-2-32
Dielectric Test: 3kV, 50/60Hz, 1 min. between four interconnected measuring terminals and any external metal ground
Environmental: O-ring sealed against dust and water to IP50 (Protection Index)

Safety / Reference Specifications

Safety Ratings: EN 61010-1, Cat. III, Pollution Degree 2, 42V
Agency Approvals: CE Mark