AC Tool Supply has the guaranteed lowest prices on trusted brand name quality tools and test equipment. 877-207-1244
Contact Us
Internet Payments

Net 30 Day payment terms
0 item(s) | TOTAL: $0 view cart
Home Blog My Account Contact Us About Us Shipment Tracking Terms & Conditions GSA Orders Financing / Leasing International Customers
Request a Quote OSHA / ANSI Safety Guide Canada Customers Faxing Purchase Orders Privacy Policy Price Match Guarantee
Insulation Vacuum Systems
Capital Safety DBI-SALA
Infrared Thermography Training
Insulation Blowing Machines
Intec Insulation Blowers
Knipex Hand Tools
Krendl Insulation Blowers
Met One Instruments
Miller Fall Protection
OSHA & ANSI Safety Products
Speciality Tools
IECC International Energy Conservation Code
2015 IECC International Energy Conservation Code
2018 IECC International Energy Conservation Code
Insulation Machine
Used Insulation Equipment
Advanced Cable Ties
Air Systems International
Allegro Industries
Capital Safety
Chicago Protective
Cool Machines
CorDEX Instruments
E Instruments
General Floorcraft
Gillette Generators
Infraspection Institute
Insulation Machine Corp IMC
Met One Instruments
MSA Safety
NIKRO Industries, Inc.
Oberon Safety
Pro Built Tools
Rapid Care
Schaefer Ventilation Equipment

AEMC 3731 2117.61 Clamp On Memory Alarm Ground Resistance Tester Meter
Product Information

3731 Datasheet 3731 Datasheet
  3731 Users Manual 3731 Users Manual
  Ground Resistance Calculator Ground Resistance Calculator
  Ground Resistance Testing Ground Resistance Testing
  Fall of Potential vs. Clamp On Fall of Potential vs. Clamp On
  Soil Resistivity Soil Resistivity
  Ground Comparison Chart Ground Comparison Chart

Your Price:
Not for Sale
Choose Options and Quantity
NIST Calibration NIST Calibration [+$105.00]
Accessories 25 Ohm calibration checker [+$54.88]

AEMC 3731 2117.61 Clamp On Ground Resistance Tester with Memory and Alarm

The AEMC 3731 Clamp On Ground Resistance Tester measures small grid and ground rod resistance through any season, without the need for auxiliary ground rods, and has memory and alarm features.


Check Resistance on Multiple and Single Rods or Grids

Clamp on Ground Resistance Testers are used in multi grounded systems without disconnecting the ground under test. The 3731 easily clamps around the ground rod or conductor and measures the resistance to ground. By taking measurements on intact ground systems, the operator also verifies the quality of the bonds and grounding connections. Continuity and Resistance of grounding loops around buildings and pads may also be measured.


3731 Features

  • Fast and easy clamp on operation with no leads, auxiliary rods, or spacing requirements. Neutral service disconnect unnecessary
  • Direct reading of ground resistance from 0.01 to 1200 Ohms
  • Direct reading of ground loop resistance and continuity
  • Direct reading of phase current or ground leakage from 1 mA to 30 Arms
  • Large jaw design with 1.25 inch (32 millimeter) window will fit up to 1000 MCM cables
  • Alarm function with buzzer and adjustable set point for fast and easy field checks
  • Store 99 field measurements in memory for later retrieval
  • Stored memory information and alarm settings saved during shutdown
  • Auto off power
  • UL and CE Mark approved
  • Durable Lexan body and head construction resists breakage
  • Patented design


  • Measure electrical grid and ground rod resistance
  • Test multi grounded systems without ground rod disconnection under test
  • Measure continuity and resistance of grounding loops around buildings and pads
  • Measure leakage current flowing to ground or circulating in ground systems
  • Conduct field surveys, retrieve data, then analyze readings later
  • Use on telecommunication sites and cell towers
  • Use on spas, pools, and other consumer installations

Measurement Range
Type Ground Resistance Ranges
Range Autoranging 0.01 to 1200 Watts
Measurement Range 0.10 to 1.00 Watts / 1.0 to 50.0 Watts / 50.0 to 100.0 Watts / 100 to 200 Watts / 200 to 400 Watts / 400 to 600 Watts
Resolution 0.01 / 0.1 / 0.5 / 1 / 5 / 10 Watts
Accuracy in percent of Reading ± (2 percent Reading ± 0.02 Watts ) / ± (1.5 percent Reading ± 0.1W ) / ± (2.0 percent Reading ± 0.5W ) / ± (3.0 percent Reading ± 1W ) / ± (6 percent Reading ± 5W ) / ± (10 percent Reading ± 10 Watts )
Resistance Measurement Frequency 1.689 kHertz
Resistance Overload OL displayed above 1200 Watts
Current Measurement Frequency 47 to 800 Hertz
Current Overload OL displayed above 30 Arms
Power Source 9 Volt Alkaline battery
Battery Life typical: 8 hours or approximately 1,000 measurements of 30 seconds
Mechanical Specifications
Display 3-3/4 Digit, 1.73 x 1.10 inches (44 x 28 millimeters)
Operating Temperature 14 to 131 degrees F (-10 to 55 degreesC)
Storage Temperature 40 to 158 degrees F (-40 to 70 degrees C)
Relative Humidity 0 to 90 percent RH at 14 to 104 degrees F (-10 to 40 degrees C), 75 percent RH at 131 degrees F (55 degrees C)
Dimensions 9.25 x 3.94 x 2.17 inches (235 x 100 x 55 millimeters)
Jaw Window Diameter 1.25 inches (32 millimeters)
Jaw Opening 1.38 inches (35 meters)
Case Lexan 920A (UL94V)
Colors Gray body, red jaws
Shock Test IEC 68-2-27
Vibration Test IEC 68-2-6
Drop Test (1 meter); IEC 68-2-32
Dielectric Test 2500 Volts AC
Environmental IP30, IEC 359 Group III
Working Voltage 150 Volts Cat. III - Pollution Degree 2 300 Volts, Cat. II - Pollution Degree 1
Max Overload (A or OHM Function) 100 A continuous, 200 A (<5s) 50/60 Hertz
Safety Reference Specifications
Safety Ratings IEC 1010, 150 Volts, Cat. III; IEC 1010, 300 Volts, Cat. III
Agency Approvals CE Mark, UL, CSA
 Related Items
MSA Safety 506262 Dynescape Automatic Retractable Descender SST 105Ft
Add To Cart
Novatek 194.0205 Air Peening Prep Tool 2 Inch Rotopeen Flaps
Add To Cart
Bacharach 2002-5000 MS050 Refrigerant Manifold Set R-12/22/134a
Add To Cart


About Us

Contact Us

My Account

Secured By Rapid SSL $10,000 Warranty

Copyright © AC Tool Supply Inc. All Rights Reserved.