AEMC Ground Resistance Testers

AEMC 3711 and 3731 Clamp-On Ground Resistance Tester --

  Ordering Info

Applications  Measure ground rod and small grid resistance  Use in multi-grounded systems without disconnecting the ground under test  Measure resistance and continuity of grounding loops around pads and buildings  Measure leakage current flowing to ground or circulating in ground loops  Conduct quick field checks 3711 Features Simple and fast clamp-on operation - no leads, no auxiliary rods or spacing requirements. No need to disconnect neutral service Direct reading of ground resistance from 0.01Ω to 1200Ω Direct reading of continuity and ground loop resistance Direct reading of ground leakage or phase current from 1mA to 30Arms Jaw design with large 1.25" (32mm) window - accommodates up to 1000MCM cables Auto-off for power management CE Mark and UL approved Rugged Lexan head and body construction resists breakage Patented design

 3731 Additional Features 

• Alarm function with adjustable setpoint and buzzer 
• Memory function to store 99 field measurements for later retrieval and analysis 

3731 Additional Applications 

• Conduct field surveys and retrieve and analyze readings are a later time

Model 4610 Digital Ground Resistance Tester -- Kit

  Ordering Info

Features  Fall-of-potential method  Measures ground resistance (2- and 3-point) and soil resistivity (4-point)  Step voltage tests and touch potential measurements  Autoranging: automatically selects the optimum range  Designed to reject high levels of noise and interference  Extremely simple to operate: connect - press - read  LED on faceplate informs operator of high input noise, high auxiliary rod resistance and fault connections  Battery powered  Rugged dustproof and rainproof field case  May be used for continuity tests on bonding  Color-coded terminals

Applications:   The Ground Resistance Tester Model 4610 is a rugged, easy-to-use instrument ideal for maintenance crews performing numerous tests. The Model 4610 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 4610 may be used to perform the following tests: 

• 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 likely 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 three-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 (the outline of the part of equipment in contact with the earth) is comparable to the size of the ground to be tested.
• Two-point tests for continuity 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.