Grounding System Tester

Ground Resistance Testers for Earthing Systems, Ground Grids and Lightning Protection

Twenty-one instruments for earthing work: ground resistance and soil resistivity measurement, substation ground grids, equipotential bonding, down-lead continuity, DC ground fault location, insulation resistance and the calibrator that keeps the rest honest.

What is in this section

• Ground resistance and resistivity — the HF-GT-202 multifunction ground resistance tester measures 0.00 Ω–20.00 kΩ on the 2- and 3-wire methods at ±1.5 %rdg ±7 dgt with 0.01 Ω resolution, ground voltage 0.000–750.0 V and DC voltage 0.000–1000 V, running on an internal 11.1 V lithium battery specified for more than 1000 measurements at a 128 Hz sine test waveform. The HF-GT-201 ground resistance tester is specified for operating conditions of −10 °C to +40 °C at up to 80 % RH, an auxiliary ground resistance below 30 kΩ, interference voltage below 20 V and interference current below 2 A. The HF-GT-209 clamp-on ground resistance tester, HF-GT-210 earth resistance tester and HF-GT-218 soil resistivity tester cover the same ground from different directions.
• Ground grids, bonding and continuity — the HF-GT-203 ground grid resistance testing system measures ground resistance, soil resistivity, step voltage and distributed potential from 0.030 Ω to 2000 Ω at ±2 %rdg ±5 dgt with 0.001 Ω resolution, 2000 W of rated measuring power and immunity to 50 Hz power-frequency interference up to 50 V, supplied from AC 220 V 10 A. The HF-GT-205 digital equipotential bonding tester, HF-GT-211 ground bond tester, HF-GT-212 ground grid tester and HF-GT-213 grounding down lead earth continuity tester complete the group.
• Fault location and insulation — the HF-GT-214 grounding wire resistance tester, the HF-GT-217 insulation resistance tester and two DC ground fault locators (HF-GT-215 and HF-GT-220).
• Measurement support — the HF-GT-204 non-contact electrostatic voltmeter reads 0 to ±200 kV with automatic ranging at better than ±10 % and an input impedance above 10¹⁶ Ω; also the HF-GT-206 SPD tester, the HF-GT-207 and HF-GT-208 frequency selective voltmeter and multimeter, a medical-grade earth tester, a variable-frequency grid tester and the HF-GT-221 ground resistance tester calibrator.

How to choose a grounding system tester

Start from the electrode layout: a single rod or mast can be measured with a clamp or a three-wire meter, while a grid with dozens of down leads needs the fall-of-potential method with enough output power and interference rejection. Then confirm the resistance you must resolve (0.01 Ω on a grid against whole ohms on a small electrode), whether soil resistivity and step or contact voltage are in the test schedule, and how readings are recorded.

Every instrument in this section is sourced from qualified partner factories in China, verified and tested against its datasheet before shipment and delivered with its test documentation. Houfeng is a trading company and supplier, not a manufacturer.