Poor grounding is dangerous and contributes to unnecessary downtime and increases the risk of equipment failure. The Amprobe GP-2A Earth Ground Resistance Tester provides accurate and reliable measurements for ground resistance and soil resistivity to assure the safety and performance of an electrical system. The GP-2A is complete with PC software that allows the user to download critical recorded measurements and to create professional reports for customers.
| Demo-Request-URL |
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| 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) |
| ADDITIONAL FUNCTIONS / FEATURES | |
| 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 |
| ELECTRICAL SPECIFICATIONS | ||
| Resistance Measurement | Open circuit voltage ≤ 25 Vrms Test current ≤12 mA Measuring Frequency 77.5 Hz ± 1 Hz |
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| Measuring Range | 3- and 2-wire earth resistance measurement: 0.08 Ω – 49.9 kΩ Earth resistivity (4-wire): 0.50 Ωm – 314 kΩm |
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| 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 | |
| GENERAL SPECIFICATIONS | |
| 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) |
| Humidity (without condensation) |
<80% |
| 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 |
| Datasheet » |
| Product Manual » |
SteveB –
Great build quality, great functionality
I received an Amprobe GP-2A as a warranty replacement for a previous model that arrived without the accessory bag containing all of the connection cables, the comm cable, and stakes. Amrpobe’s Customer Service handled the issue like pros and sent me the replacement unit straight away.
Using the GP-2A was very intuitive and provided us with highly accurate results for both ground array resistance and soil resistivity. Both of which were very important to us in the design and installation of a fuel handling & storage facility that required lightning protection, a low resistance ground grid, and cathodic protection for buried pipelines. The ability to export the results was icing on the cake.
Well done, Amprobe!
✔ Yes, I recommend this product.