Model GC-1000 Automated Digital Ground Continuity Tester


  • 1 Button Testing No setup required, just plug right in, Digital LED display reads out in Ohms
  • Auto Test Time (1 sec. / 60 sec.)+ No need to set a timer or clock watch, Also performs the Low Current Ground Continuity test, at the same time!
  • Custom universal receptacle accepts both 120V and 240V plugs
  • Zero feature allows you to "zero-out" the test lead impedance
  • Meets UL, CSA, CE, EN, IEC, MIL and all other international safety agency requirements.
  • GC-1000 with universal socket
    GC-1000 with standard socket
  • In the standards, the 0.1-ohm limit is for the product under test’s grounding system only, not including the power cord impedance. Our “zero” feature allows you to zero out the cord impedance. This ensures no false failures and extremely accurate results!



Test Current 25A or 30A (selectable) Accuracy ± 2% full scale
Input Current 1A Weight 15 lbs.
Input Frequency 50 – 60 Hz Input Voltage 100 – 120 or 220 -240VAC
Test Time 1 sec or 60 sec (selectable)+ Dimensions 12" x 11" x 5”
Failure Indication 0.1 ohm trip setting (0.2-ohm available )++  

Model GC-2000 Automated Digital Ground Continuity Tester

  • 1 Button Testing – No setup required, just plug right in! Or, make a plug for your cordless product, and plug right in! EASY!
  • Also performs the Low Current Ground Continuity test, at the same time!
  • Auto Test Time (1 sec. / 60 sec.)+ – No need to set a timer or clock watch
  • Custom universal receptacle accepts both 120V and 240V plugs
  • Zero feature allows you to "zero-out" the test lead impedance.
  • Meets UL, CSA, CE, EN, IEC, MIL and all other international safety agency
  • In the standards, the 0.1 ohm limit is for the product under test’s grounding system only, not including the power cord impedance. Our "zero" feature allows you to zero out the cord impedance. This ensures no false failures and extremely accurate results!
  • GC-2000
    GC-2000 with ED&D Exclusive Check-Mate™


Test Current 25A or 40A (selectable) Accuracy ± 2% full scale
Input Current 2A Weight 15 lbs
Input Frequency 50 – 60 Hz Input Voltage 100 – 120 or 220 – 240 VAC
Test Time 1 sec or 60 sec (selectable) Dimensions 12" x 11" x 5"
Failure Indication 0.1 ohm trip setting  

Model GC-3000 Automated Digital Ground Continuity Tester

  • 1 Button Testing – No setup required, just plug right in! Or, make a plug for your cordless product, and plug right in! EASY!
  • Also performs the Low Current Ground Continuity test, at the same time!
  • Auto Test Time (60 sec. / 120 sec.) – No need to set a timer or clock watch
  • Custom universal receptacle accepts both 120V and 240V plugs
  • Zero feature allows you to "zero-out" the test lead impedance.
  • Meets UL, CSA, CE, EN, IEC, MIL and all other international safety agency requirements.
  • In the standards, the 0.1-ohm limit is for the product under test’s grounding system only, not including the power cord impedance. Our “zero” feature allows you to zero out the cord impedance. This ensures no false failures and extremely accurate results!
  • GC-3000 running long test time ground impedance test.


Test Current 25A or 40A (selectable) Accuracy ± 2% full scale
Input Current 2A Weight 15 lbs
Input Frequency 50 – 60 Hz Input Voltage 100 – 120 or 220 – 240 VAC
Test Time 1 sec or 60 sec (selectable) Dimensions 12" x 11" x 5"
Failure Indication 0.1 ohm trip setting  

Model GC-100A Ground Continuity Tester

  • This product is intended for determining ground impedance of product enclosures and grounding wiring at high current (100 A). This product complies with most IEC, EN, UL, CSA and other standards with Ground Continuity Tester requirements.
  • DANGER OF SHOCK HAZARD POTENTIAL Enclosure Panels: For Qualified Service Personnel access only. Test Power Output: Risk of Hazardous Energy.
  • WARNING READ MANUAL BEFORE USING Enclosure Panels: For Qualified Service Personnel access only.
  • Note: In the standards, the 0.1 ohm limit is for the product under test’s grounding system only, not including the power cord impedance. Our "zero" feature allows you to zero out the cord impedance. This ensures no false failures and extremely accurate results!


System Electrical Ratings 240 VAC(± 10%), 60 Hz., 12 A Overall Weight 100 lbs. (45.4 Kg)
Power Connection Certified detachable power supply cord with integral plug Output Ratings 0-22 VAC, 0-100 A
(0-.22 Ω @ 100 A)
Environmental Ratings 10-40 °C, indoor use only Amps Accuracy ± 2% full scale
Overall Dimensions 18 in. D x 21 in.W x 11.5 in. H(45.7 x 53.3 x 29.2 cm) Volts Accuracy ± 2% full scale

Model Check – Mate GC Daily Ground Continuity Checker

  • PASS and FAIL modes for quick verification of results.
  • Used for the 1-second test mode and/or the 2-second test mode.
  • Designed for use with our models GC-1000 and GC-2000; accurate results also on other manufacturer’s ground testers
  • Unit comes with NIST traceable and ISO 17025 Accredited Certificate of Calibration
  • PATENTS PENDING