AEMC 3711 Clamp-on Ground Resistance Tester

The Models 3711 and 3731 measure ground rod and grid resistance in any environment
without the use of auxiliary ground rods. Clamp-on ground resistance testers are used on
multi-grounded systems without disconnecting the ground under test.The Models 3711 and
3731 simply clamp around the ground conductor or rod and measure the resistance to
ground fast and accurately. By performing measurements on installed 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. Both models include a current
measurement function. The probe's high sensitivity enables measurementof leakage current flowing to ground
or circulating in ground loops down to 1mA and neutral and phase currents to 30 Arms. This feature provides
additional information, whichis vital in distribution ground networks carrying higher levels of noise and harmonics,
that affect power quality. The Model 3731 offers an alarm function and a memory (logging) function.
In the alarm mode, the probe will audibly and visually indicate readings beyond set point. The user may also
have the alarm initiated above or below the set point. This alarm feature permits quick field checks where only
"pass" or "fail" readings will suffice.

Features

• Simple and fast clamp-on operation, no leads, no auxiliary rods or spacing requirements
• Direct reading of ground resistance from 0.01 to 1200 Ohms
• 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 1000kc mil cables
• Auto-Off for power management
• Alarm function with adjustable setpoint and buzzer for quick field checks (Model 3731)
• Memory function to store 99 field measurements for later retrieval and analysis (Model 3731)
• Meets EN 61010, Cat. III
• CE Mark and ULa pproved
• Rugged Lexan®head and body construction resists breakage
• Alarm settings and stored memory information saved during shut down (Model 3731)
• 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