Duncan Instruments Canada Ltd
Duncan Instruments Canada Ltd.
Electronic Measurement Solutions since 1968
Home  Products  Services  Rental  Contact Us 
   Search Our Site   
1-877-742-4448
Duncan Instruments Canada Ltd
Join our mailing list
Products
ARB /Function Generators
Battery Testing
Breadboard
Data Logging
Electrical Insulation Testing
Electrical Testers
Environmental Instruments
Fused Test Leads
Ground Resistance Tester
LAN Speed Test
Low Resistance Ohmmeter
Oscilloscope
Power Analyzers
Power Quality Analysis
Power Supplies
Resistance Boxes
Tachometers/Stroboscopes
Transformer Testing
Universal Programmers
Technical Articles
Insulation Resistance Tester
Low resistance ohmmeter / microohmmeter / micro-ohmmeter
Arbitrary Waveform Generator
Calibration Service
Radiation Detector
Variable Transformer
Tachometer

 



Clamp-On Ground Resistance Tester Model 3731

Ground Resistance Tester

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 0.01O to 1200O
  • 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
  • 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
Application
  • 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



Technical Specification

Ground Resistance Ranges

 

Auto-Ranging 0.01 to 1200 Ohm

Range (Ohm) Accuracy ( % of Reading) Resolution
0.1 ~ 1.00 ±(2% ± 0.02) 0.01
1.0 ~ 50.0 ±(1.5% + 0.1) 0.1
50.0 ~ 100.0 ±(2.0% + 0.3) 0.5
100 ~ 200 ±(3.0% + 1) 1
200 ~ 400 ±(6.0% + 5) 5
400 ~ 600 ±(10% + 10) 10
600 ~ 1200 ±(25% + 50) 50

Current Measurement Ranges

 

Auto-Ranging 1mA to 30.00 Arms

Measurement Range Accuracy ( % of Reading) Resolution
1 to 299mA ±(2.5% + 2mA) 1 mA
0.300 to 2.999A ±(2.5% + 2mA) 0.001 A
3.00 to 29.99A ±(2.5% + 20mA) 0.01 A
10A 2.5% + 0.03 A 0.01 A
20A 2.5% + 0.05 A 0.03 A
Resistance Measurement Frequency
2403Hz
Current Measurement Frequency
47 to 800Hz
Current Overload
OL Displayed above 29.99 Arms
Power Source
9V Alkaline Battery
Battery Life
Typical: 8 Hours or approx. 1000 measurements of 30 second
Weight
1050g
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)
Display
LCD 33/4 Digit, 1.73 x 1.10" (44 x 28mm)
Operating Temperature
14° to 131°F ( -10°C to 55°C)
Operating Humidity
10 to 90% RH @ 14° to 104 °F(-10° to 40°C), 75RH @131°F (55°C)
Storage Temperarure
-22 to 158°F(-30°C to 70°C)
Safety Rating
EN61010-2-032 (Class 2) Double Insulation
CE Mark
Yes

Last modified August 10, 2009

Home | Products | Services | Software | Contact Us