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AEMC MODELS 3711
and 3731 GROUND RESISTANCE TESTERS
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AEMC MODELS 3711/3731
GROUND RESISTANCE TESTERS
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- Simple and fast clamp-on operation – no
leads, no auxiliary rods or spacing requirements
- Direct reading of ground resistance from
0.01 to 1200ohms
- 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
- 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)
- Alarm settings and stored memory information
saved during shutdown (Model 3731)
- Patented design
- Rugged Lexan® head and body construction
resists breakage
- CE Mark and UL approve
- Meets EN 61010, Cat. III
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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 measurement of leakage current flowing
to ground or circulating in ground loops down to 1mA and 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
only “pass” or “fail” readings will suffice. |
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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
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Specifications:
MODEL 3711 and 3731
ELECTRICAL
Ground
Resistance Ranges (Auto-ranging):
Range Resolution
Accuracy
(% of Reading)
0.10 - 1.00 ohm 0.01
±(2%
± 0.02)
1.0 - 50.0 ohm
0.1 ±(1.5%
± 0.1)
50.0 - 100.0ohm 0.5
±(2%
± 0.5)
100 - 200 ohm 1
±(3%
± 1)
200 - 400 ohm 5
±(6%
± 5)
400 - 600 ohm 10
±(10%
± 10)
600 - 200 ohm 50
Not
Rated
Resistance Measurement Frequency: 2403Hz
Current Measurement Ranges (Auto-Ranging):
Range
Resolution
Accuracy
(% of Reading)
1 - 299mA 1mA
±(2.5%
+ 2mA)
0.300A - 2.999A 0.001A
±(2.5% + 2mA)
3.00A - 29.99A 0.01A
±(2.5%
+ 20mA)
Current Measurement Frequency: 47 to 800Hz
Power Source: 9V Alkaline battery
Battery Life: Typical: 8 hours or
approx. 1000 measurements
of 30 seconds
MECHANICAL
Display: LCD,
0.71" (18mm) high (3 3/4 digit)
Operating Temperature: 14° to 122°F (-10° to 50°C)
Dimensions: 9.25 x 3.94
x 2.17" (235 x 100 x 55mm)
Weight:
2.2 lbs (1kg)
Jaw window diameter: 1.25" (32mm)
Jaw opening: 1.38"
(35mm)
SAFETY
Rating:
EN 61010-2-032 (Class 2) Double Insulation
CE Mark: Yes
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Call GISCO / 1-800-523-1526 (952-929-8000)
FAX 952-926-5498 / EMAIL:sales@giscogeo.com
