UNI-T UT572 Advanced Earth Resistance Tester
Professional Earth Resistance Testing with Multi-Wire Measurement Capabilities
The UNI-T UT572 is a professional-grade earth resistance tester designed for precise ground system evaluation and soil resistivity analysis. Engineered for electrical contractors, power system technicians, and facility maintenance professionals, this advanced instrument delivers reliable measurements for power equipment wiring, lightning protection systems, and telecommunications infrastructure. With multi-wire testing capabilities, automated connection verification, and interference detection, the UT572 ensures accurate ground resistance evaluation in diverse field conditions to maintain safety standards and electrical system integrity.
Key Features
- Versatile Multi-Wire Testing: Supports 2-wire, 3-wire, and 4-wire measurement methods for different on-site applications
- Dual Measurement Functions: Tests both earth resistance (Re) and soil resistivity (ρ) with high accuracy
- Automatic Interface Verification: Checks connection integrity before measurements to ensure reliable results
- Interference Detection: Identifies and measures disturbance voltage and frequency that could affect readings
- Precision Measurement: Accuracy of ±(3%+5) across multiple resistance ranges up to 40kΩ
- Data Storage Capability: Saves up to 20 measurement sets for documentation and analysis
- Comprehensive Testing Kit: Includes earth spikes, long test leads (up to 40m), and alligator clips for complete field testing
- Professional Safety Rating: CAT III 600V certification for safe operation in industrial environments
Advanced Measurement Technology for Ground System Integrity
The UNI-T UT572 delivers exceptional measurement precision with dual test frequencies (94Hz and 128Hz), enabling accurate earth resistance readings even in environments with electrical interference. With measurement ranges spanning from 4Ω to 40kΩ and resolution down to 0.01Ω, it provides the detailed data necessary for comprehensive ground system evaluation. The tester automatically detects potentially disruptive interference voltage up to 50V and identifies frequencies between 40Hz-500Hz that could affect measurement integrity.
The specialized soil resistivity function allows precise evaluation of ground conditions for new installations, with adjustable test distances from 1m to 40m, providing critical data for optimal grounding electrode placement. For advanced diagnostics, the UT572 includes dedicated RH and RS testing capabilities to identify individual electrode contributions to overall resistance, along with compensating resistance (RK) evaluation to account for test lead effects in high-precision measurements.
Comprehensive Measurement Capabilities
The UT572 combines essential earth resistance measurements with specialized functions to deliver complete grounding system diagnostics:
- Earth Resistance Testing: Measures from 0.01Ω to 40kΩ across multiple ranges for everything from large grounding grids to single rod electrodes
- Soil Resistivity Analysis: Determines ground conductivity characteristics for optimizing new grounding system installations
- Interference Monitoring: Measures stray voltages up to 50V and identifies frequencies between 40Hz-500Hz that could affect readings
- Electrode Resistance Evaluation: Measures individual earth electrode resistance components (RH and RS) to identify specific grounding issues
- Test Lead Compensation: Accounts for resistance in test leads (RK) when performing high-precision measurements
- Data Capture and Storage: Stores up to 20 complete measurement sets for documentation and trend analysis
The complete measurement capabilities make the UT572 suitable for both installation verification and maintenance testing across industrial, commercial, and utility applications, ensuring grounding systems meet safety standards and provide intended protection.
Field-Ready Durability and Convenience
The UNI-T UT572 is engineered for reliable field operation with features designed for practical use in diverse environments:
- Compact, Rugged Construction: Portable design (210 x 175 x 90 mm) with protective rubber overmold for durability in field conditions
- Comprehensive Accessory Kit: Includes four earth spikes and extended test leads (40m, 20m, 10m, and 5m) for various testing configurations
- Clear LCD Display: Features backlight for visibility in all lighting conditions and clear reading of measurement values
- Data Hold Function: Freezes readings for convenient recording in difficult access locations
- Automatic Power Off: Conserves battery life during field operations
- Battery Monitoring: Low battery indication at ≤9.5V ensures measurement reliability
- Complete Carrying Solution: Includes carrying bag and elastic strap for comfortable transport between testing locations
These durability and convenience features ensure the UT572 performs reliably across various field environments, from urban electrical installations to remote telecommunications sites and utility infrastructure.
Professional Applications
Power Distribution Systems
Electrical engineers and technicians rely on the UT572's precision and versatility for:
- Substation grounding grid verification
- Transformer neutral ground testing
- Transmission tower base resistance measurement
- Power equipment protective ground continuity
- Soil resistivity analysis for new installations
Lightning Protection
Lightning protection specialists leverage the UT572's specialized features for:
- Lightning rod grounding system verification
- Strike termination device ground path testing
- Equipotential bonding system evaluation
- Ground resistance measurement of surge protection systems
- Seasonal ground resistance monitoring
Telecommunications
Telecommunications technicians depend on the UT572's precision for:
- Cell tower grounding system verification
- Data center equipment ground testing
- Signal reference ground evaluation
- Cable shield grounding effectiveness
- Antenna ground system integrity verification
Industrial Facilities
Facility maintenance professionals utilize the UT572 for:
- Manufacturing equipment ground verification
- Static discharge system effectiveness testing
- Equipotential bonding measurement
- Electrical safety compliance testing
- Ground fault circuit troubleshooting
Frequently Asked Questions
What test method does the UT572 use?
The UT572 uses the 4-wire (Wenner) method for ground resistance measurement. The 4-wire technique eliminates lead resistance from the measurement, providing the most accurate results for grounding system verification.
What comes in the UT572 test kit?
The UT572 kit includes the instrument, test leads, auxiliary ground stakes, and carrying case — everything needed to perform ground resistance measurements in the field.
When should ground resistance be tested?
Ground resistance testing should be performed during initial installation, periodically as part of a preventive maintenance program (annually is common), and after any modifications to the grounding system. Soil conditions change seasonally, so testing during dry periods provides worst-case readings.
Warranty
This product includes a standard 1-year warranty covering manufacturing defects and component failures under normal use conditions.
UNI-T stands behind every product we sell. If you experience any issues within the warranty period, our US-based support team is here to help with troubleshooting, repair, or replacement.
Data Sheets and Manuals
Software / Firmware Downloads
- Not currently available. Contact us with questions.
