AEMC Instruments 2135.58 - 6424 3-Point Digital Ground Resistance Tester - 50k Ohm, ACA & AC/DCV Measurement & Memory w/150 ft KIT


The AEMC Instruments Digital Ground Resistance Tester Model 6424 performs 2-pole and 3-pole ground resistance measurements. This direct reading tester is auto-ranging, so it automatically seeks out the optimum measurement range. The Model 6424 is easy to use - simply connect the leads, press to measure, and read. The large LCD also indicates low battery status, overrange, and lead reversals.

The Model 6424 comes with 3 safety color coded terminals to aid in easy hookup, measure voltage up to 700V AC/DC and AC current up to 70A with the optional current probe Model MN72.

The Model 6424 is powered by 6 x AA rechargeable NIMH batteries.


  • 150 ft KIT includes:
    • Carrying Bag
    • (2) 150 ft Color-coded Leads on Spools (Red/Blue)
    • (1) 30 ft Lead (Green)
    • (2) 5 ft Color-coded Leads (Red/Blue)
    • (2) 14.5" T-shaped Auxiliary Ground Electrodes
    • (1) Set of 5 Spaded Lugs
    • (1) 100 ft AEMC® Tape Measure
  • Simple, one button operation - eliminates errors in testing
  • Test button turns green when measurement is stable
  • 2P resistance/ 3P ground resistance measurement up to 50kΩ for highly resistive terrain
  • Large back lit digital display – easier to read in all lighting conditions
  • Automatic hold function - retains last measurement after the reading stabilizes ensuring the measurement is valid
  • Automatic test frequency selection between 128 and 256 Hz, providing stable results in adverse environments
  • Powers up in 2 pole mode – automatically checks the injector lead connection when connected to the H auxiliary rod
  • Convenient storage of the three measurements along with the average and % deviation - easily determines proper test results
  • Built in test lead compensation capability – improves the accuracy of low resistance measurements
  • CAT IV 600V rated for a high level of operator safety
  • Checks AC/DC voltage and AC leakage current
  • Stores 52, 62 and 72% measurements – eliminates errors in determining the ground resistance
  • Leakage current measurement from 0.5mA to 70A
  • Battery recharging via AC adapter, USB or vehicle DC port b
  • Color coded leads and terminals provide fast, error-free connection hook-up
  • Detects and prohibits hazardous voltage measurement
  • Direct access to all functions, even when wearing work gloves
  • Rugged water resistance case, for all terrain use
  • Built-in display stand to prop up instrument for seeing the display better when placed on the ground
More Information
Display Digital
Features Datalogging
Manufacturer AEMC Instruments
Measurement 50k Ohms
Rating CAT IV-600V
Type Ground Resistance Testers
Additional Skus 6424, 2135.58, 213558
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