The Fluke 1630 earth ground clamp utilises the Stakeless testing method where earth ground stakes are no longer necessary. There is no need to disconnect parallel ground rods and find suitable locations for placing auxiliary ground stakes. This saves time and enables earth ground loop tests to be performed in locations where other techniques are not possible.

The Fluke 1630 is placed around the earth ground rod or the connecting cable. A known voltage is induced by one half of the clamp and the current is measured by the other half and the clamp then automatically determines the ground loop resistance at this connection. Applications for the Fluke 1630 include earth ground loop testing in various installations such as high voltage pylons, buildings, cell phone substations, RF transmitters, the inspection of lightning protection systems and leakage current measurement.

• A wide ground loop resistance range, from 0.025 Ω to1500 Ω, to satisfy all requirements
• Large jaw opening of 35 mm (1.38 in) for tests on ground conductors and/or equipotential bus bars
• Measurement of ground leakage current, from 0.2 mA to 1000 mA, without needing to disconnect - ideal for system troubleshooting
• Wide ac current measurement range from 0.2 A to 30 A allows one instrument for multiple applications
• Continuity loop test - quickly assess whether resistance is less than 40 Ω, with audible alarm
• User-defined HI / LO Alarm limits, for rapid measurement evaluation
• Handy “Display-Hold” button for capturing readings in hard-to-reach places
• Time saving memory function automatically records and stores measured values
• Automatic self calibration ensures correct measurement every time