UNI-T UT278D Ground Pile Clamp Earth Resistance Tester

Description

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: Category Specification Display: 2.4-inch color LCD (46 × 29 mm) Jaw Size: 68 mm Measurement Rate: 1 time/sec Power Supply: Built-in DC 3.7V rechargeable lithium battery Battery Indicator: Real-time display Auto Power Off: 15 minutes Data Storage: 500 sets USB Data Transfer: Supported Weight: 975 g (including battery) Operating Temperature: –10°C to 50°C; <80% RH Storage Temperature: –10°C to 60°C; <70% RH Insulation Resistance: >20 MΩ (500V between circuit and case) Withstand Voltage: AC 3700V RMS (between circuit and case) External Magnetic Field: <40 A/m External Electric Field: <1 V/m Safety Standards: IEC61010-1, IEC61010-031, IEC61557-1 Measurement Categories: CAT III 300V, CAT IV 150V; Pollution Degree 2 Ground Resistance Range: 0.00 Ω – 2000 Ω Leakage Current Range: 0.000 A – 60 A Current Resolution: 1 µA 3/4-Wire Resistance Range: 0.00 Ω – 30 KΩ Soil Resistivity Range: 0.00 Ω – 9999 KΩ Ground Voltage Range: 0 – 600 V Accuracy Reference Conditions: 23°C ± 5°C, <75% RH 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

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