Earth Ground Testers - Fluke Corp


Fluke Corporation, the global leader in handheld electronic test and measurement technology, today announced two new earth ground testers designed to perform all four types of ground resistance measurements quickly and conveniently. The Fluke 1625 Advanced GEO Earth Ground Tester and the Fluke 1623 Basic GEO Earth Ground Tester feature the unique “Stakeless” testing method, as well as providing “selective” testing, the classic 3- and 4-pole fall of potential, and 4-pole soil resistivity testing. Designed to use with comprehensive predictive maintenance programs for industrial, field service and utility applications, the Fluke 1625 and the Fluke 1623 testers are able to measure earth ground loop resistances using only clamps. Called stakeless testing, this method doesn’t require the use of any earth ground stakes or disconnection of ground rods as long as a bonded earth ground system exists for the building or structure under test. Users place two clamps around the earth ground rod and connect each to the tester. A known, fixed voltage is induced by one clamp; the current is measured using the second clamp, and the tester automatically determines the loop resistance of the earth ground system. The stakeless testing method saves time, enabling earth ground tests to be performed in areas where there is no access to soil – such as inside a building or on a power pylon – without placing earth ground stakes or disconnecting the earth ground system. In addition, the Fluke 1625 and Fluke 1623 testers perform selective testing using one clamp and stakes, and both 3- and 4-pole fall of potential and 4-pole soil resistivity testing using stakes. Designed for straightforward operation, the testers guide users through which stakes or clamps need to be connected for each test with on-screen prompts on a clear display. They feature oversized start test buttons, and large rotary switches that can be easily manipulated even with a gloved hand. The Fluke 1623 Basic GEO Earth Ground Tester is intended for industrial and field service users who want a complete solution that is easy to use. The Fluke 1625 Advanced GEO Earth Ground Tester incorporates features for use in advanced industrial and utility earth ground testing applications, such as electrical substations, cell/radio/microwave towers, lightning protection systems, and remote switching sites. These advanced features include automatic frequency control (AFC) which provides more accurate earth ground values by identifying existing interference and choosing a measurement frequency to minimize its effect; R* measurement, which calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance than a fault-to-earth ground measurement; and adjustable limits for quicker test result verification. Both models are IP56 rated for outdoor use and come complete with the tester, test leads, four earth ground stakes, three cable reels with wire, two clamps, batteries and manual – all inside a rugged Fluke carrying case.


• Working temperature - 10 °C to 50 °C (14 °F to 22 °F) • Operating temperature - 0 °C to 35 °C (32 °F to 95 °F) • Weight - 1.1 kg (2.43 lb) including batteries • V ext rejection - > 120 dB (162⁄3, 50, 60, 400 Hz)
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