UNI-T UT278D Ground Pile Clamp Earth Resistance Tester

UNI-T UT278D Ground Pile Clamp Earth Resistance Tester

The UNI-T UT278D presents itself as a thoughtfully engineered solution for technicians who demand rapid, reliable earth-resistance readings without the need for auxiliary rods or disconnecting grounding conductors. At its core is a precision clamp mechanism that captures loop resistance through the grounding system in a single, non-intrusive action. By integrating fast-filtering technology, the UT278D minimizes the influence of stray electromagnetic interference common in industrial environments ensuring that each measurement reflects actual ground integrity rather than spurious noise.

Housed within a robust yet ergonomically balanced casing, the instrument combines a vivid color display and intuitive interface so that results are visible at a glance, even under poor lighting or at awkward angles. Its rechargeable lithium-battery power system supports extended field use, while automatic power-down conserves energy between tests. Multiple safety safeguards including overload protection and reinforced insulation protect both user and device when dealing with voltages up to the CAT-rated limits.

Beyond its core testing capabilities, the UT278D’s built-in data storage and USB-based transfer function allow seamless logging and analysis, eliminating manual transcription errors and simplifying compliance reporting. Whether deployed on utility grids, at telecommunications sites, or for lightning-protection verification, this clamp-style earth tester accelerates diagnostics, enhances safety, and streamlines maintenance workflows all in a single, portable instrument.

Features:

• 2.4-inch color display for clear, high-contrast readouts.
• Clamp-on earth-resistance measurement (loop method).
• Leakage-current measurement to detect stray currents.
• AC/DC current measurement up to its rated range.
• Ground-voltage measurement for on-site verification.
• Audible and visual alarm to flag out-of-tolerance readings.
• USB data-transfer port for easy logging and PC analysis.
• Built-in rechargeable lithium battery with real-time charge-level indicator.

Specifications:

Applications:

• Power distribution systems.
• Gas stations.
• Grounding grids.
• Lightning protection systems.
• Telecommunication facilities.
• Electric power infrastructure.
• Meteorological stations.
• Oil fields.

Package Include:

• 1× UT278D Ground Pile Clamp Earth Resistance Tester (main unit)
• 1× Test lead set (pair of insulated leads with banana-plug ends)
• 1× Ground spike (earth rod)
• 1× USB data-transfer cable
• 1× User’s manual
• 1× Calibration certificate / Test report
• 1× Carrying case

UNI-T  UT278D Documents:

• Datasheet
• User Manual