AEMC 3711 Data sheet
CLAMP-ON GROUND
RESISTANCE TESTER
Models 3711 & 3731
Measure down to 0.1Ω with resolution of 0.01Ω
Fast settling time (approximately one second)
High immunity to electrical noise for work around
transmission towers and substations
Extended battery life over 1000 tests (Auto-Off)
Rugged jaw construction withstands heavy
outdoor usage
Smooth jaw matting surfaces easily cleaned to
maintain reading accordingly
US Patent Number 362,639
Model 3731 performing a ground rod resistance check.
The Models 3711 and 3731 mea sure 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 measures
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 measurement of leakage current flowing to
ground or circulating in ground loops down to 1mA as well as neutral
and phase currents to 30Arms. This feature provides additional information, which is 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 “pass” or “fail” readings will suffice.
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
Features
Simple and fast clamp-on operation —
no leads, no auxiliary rods or spacing
requirements
Direct reading of ground resistance
from 0.1Ω 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
1000kcmil cables
Auto-Off for power management
Alarm function with adjustable set
point 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 UL approved and double
insulated
Rugged Lexan® head and body
construction resists breakage
Instrument’s a larm settings and stored
memory information saved during
shutdown (Model 3731)
Patented design
FUNCTIONS & FEATURES
3711 3731
Ohms Range 3 3
Arms Range 3 3
Hold Function 3 3
Self Test 3 3
Auto-Off 3 3
Battery Life Indicator 3 3
Noise Indicator 3 3
Open Jaw Indicator 3 3
Closed Loop Indicator 3 3
Multi-Tone Beeper 3 3
Alarm Function – 3
Memory (Logging) – 3
2
www.aemc.com
Technical Assistance (800) 343-1391
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