Solutions / Grounding / Measurement
Traditional Ground Resistance Testing
Our ground resistance testing products are available for individual unit sale or as part of an overall protection solution. Traditional ground resistance testing will not provide information that is as comprehensive as Smart Ground testing and is recommended for smaller areas including businesses, offices, or residential sites. For larger sites with complex electrical systems, Smart Ground offers highly accurate results. Contact us to schedule a Ground Test.
3731 Clamp-On Ground Resistance Testers
The Clamp-on Ground Resistance Tester Model 3731 measures ground rod and small grid resistance through any season, without the use of auxiliary ground rods.
Clamp-on Ground Resistance Testers are used in multi-grounded systems without disconnecting the ground under test. The Model 3731 simply clamps around the ground conductor or rod and measures the resistance to ground. By performing measurements on in-tact ground systems, the user also verifies the quality of the grounding connections and bonds. Resistance and continuity of grounding loops around pads and buildings may also be measured.
The Model 3731 also provides alarm and memory functions.
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 30 Amperes rms
- Jaw design with large 1.25″ (32mm) window - accommodates up to 1000MCM cables
- Auto-off for power management
- Alarm function with adjustable set point and buzzer for quick field checks
- Memory function to store 99 field measurements for later retrieval
- CE Mark and UL approved
- Rugged Lexan head and body construction resists breakage
- Alarm settings and stored memory information saved during shutdown
- Patented design
Applications
- Measure electrical ground rod and grid resistance
- Use on multi-grounded systems without disconnecting the ground rod under test
- Measure resistance and continuity of grounding loops around pads and buildings
- Measure leakage current flowing to ground or circulating in ground systems
- Conduct field surveys and retrieve and analyze readings at a later time
- Use on cell towers and telecommunication sites
- Use on pools, spas and other consumer installations
3640 Kit 3-Point Ground Resistance Testers
The Ground Tester Model 3640 is available alone or as a complete kit. The kit includes one 16 ft. lead, two 150 ft. leads on spools, two wind-up handles, two auxiliary ground electrodes and a soft carrying bag.
Features
- Fall-of-potential method
- Measures ground resistance (2- and 3-point)
- Auto-ranging: 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
- Color-coded terminals
- May be used for continuity tests on bonding
Applications
- The Ground Resistance Tester Model 3640 is a rugged, easy-to-use instrument ideal for maintenance crews performing numerous tests. The Model 3640 is designed to reject high levels of interference. It can be used under difficult conditions such as high stray currents that normally affect accuracy. The Model 3640 may be used to perform the following tests:
- Three-point measurements for measuring resistance to ground of ground rods and grids. Three-point measurements are generally used when the electrode or grid is easily disconnected, if corrosion is suspected, or where ground faults are unlikely to occur.
- 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.
4630 4-Point Ground Resistance Testers
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.
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
4500 4-Point Ground Resistance Testers
The Digital Ground Resistance Tester Model 4500 is designed for measuring very low resistance on large grounding systems, such as, ground grids and ground mats. It rejects high levels of interference voltages at DC or 60Hz and its harmonics, and can be used under difficult conditions such as high stray currents or excessive auxiliary electrode resistance
Applications
- Three-point measurements of large grounding grids, counterpoises, ground mats and grounded equipment.
- Soil resistivity tests (4-point measurement), commonly performed by utilities at proposed construction sites.
- Step or touch potential levels under true fault conditions can be determined by using the Model 4500 to inject a simulated low-level fault into the electrical system.
- Two-point tests for continuity tests on bonding or pre-established grounds
