Amprobe GP-2A Ground Resistance Resistivity Tester

Amprobe GP-2A Ground Resistance Resistivity Tester

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Model: Amprobe GP-2A Ground Resistance Resistivity Tester

Poor grounding is dangerous and contributes to unnecessary downtime and increases the risk of equipment failure. The Amprobe GP-2A Ground Resistance Resistivity Tester provides accurate and honorable measurements for field resistance and soil resistivity to assure the safety and produce an effect of an electrical system. The GP-2A is hermetically sealed once PC software that allows the adherent to download vital recorded measurements and to make professional reports for customers.

Specifications: Amprobe GP-2A Ground Resistance Resistivity Tester

FEATURE Range Accuracy
Ground resistance
(2 and 3-wire method)
0.01 Ω – 19.99 Ω / 199.9 Ω / 1999 Ω
19.99 kΩ / 49.9 kΩ
±(2.5% rdg + 2 LSD)
Ground Resistivity (4-wire) 0.06 Ωm – 19.99 Ωm / 199.9 Ωm / 1999 Ωm
19.99 kΩm / 199.9 kΩm / 314 kΩm
 ±(2.5% rdg + 2 LSD)
Voltage Measurement 0 V – 460V ±(2.5% rdg + 2 LSD)
Ranging Auto
Noise Voltage Detection Yes
Display Backlight Yes
Data Storage up to 999 readings
PC Connection Yes
Auto Power Off Yes
Low Battery Indication Yes
Resistance Measurement Open circuit voltage ≤ 25 Vrms
Test current ≤12 mA
Measuring Frequency 77.5 Hz ± 1 Hz
Measuring Range 3- and 2-wire earth resistance measurement: 0.08 Ω – 49.9 kΩ
Earth resistivity (4-wire): 0.50 Ωm – 314 kΩm
Maximum Deviations Influence factor Deviation influence
E1 Position 0.3%
E2 Supply voltage 0.1%
E3 Temperature 0.1%
E4 Serial interference voltage 0.4%
E5 Probe and auxiliary probe resistance 0.9%
Electromagnetic Compatibility Complies with IEC/EN 61326
Measuring Function Earth ground resistance – 3 point (fall of potential) or 2 point tests
Earth resistivity – 4 point test
Noise voltage
Display LCD with backlight, visible area 73 x 65 mm
Operating Altitude ≤ 2000 meters
Operating Temperature 0 °C to +40 °C (32 °F to 104 °F)
Storage Temperature -10 °C to +60 °C (14 °F to 140 °F)
(without condensation)
Power Supply Six 1.5V batteries AA R6 MN1500 or six 1.2V AA R6 Ni-MH 2100mA rechargeable batteries
Battery Life Approximately 500 tests
Auto Power Off 3 minutes
Overvoltage Category CAT III 240V safety rated (phase to earth), maximum 415V between inputs
Safety IEC/EN 61010-1, CAT III 240 V, pollution degree 2
IEC/EN 61010-031 for test lead accessories
IEC/EN 61557-1/-5
EMC IEC/EN 61326
Size (H x W x L) Approximately 235 x 165 x 75 mm (9.25 x 6.50 x 2.95 in)
Weight Approximately 1 kg (2.2 lb) with batteries installed
Included Accessories Four ground stakes, test lead set, alligator clip set, USB cable, USB driver software, carrying case and users manual
 Warranty One year


Key Features: Amprobe GP-2A Ground Resistance Resistivity Tester

  • Measures earth ground resistance – 3 point (fall of potential) or 2 point tests
  • Automatically calculates resistivity – 4 point test
  • Automatic voltage measurement prevents false measurements
  • Automatically applies three testing frequencies for the most accurate readings
  • Test leads, auxiliary electrodes, and software are included for complete instrument
  • Autoranging
  • 999 internal memory locations to store measurements
  • RS-232 download to a personal computer