UNI-T UT522 Digital Earth Resistance Meter

UNI-T UT522 Digital Earth Resistance Meter in Sri Lanka

Auto-Ranging Ground Resistance Meter for Fast and Accurate Earth Testing

The UNI-T UT522 Digital Earth Resistance Meter is a professional auto-ranging instrument built for efficient and accurate measurement of earth electrode resistance and ground resistance at electrical installations, industrial sites, and utility infrastructure. Its automatic range selection eliminates manual switching, significantly accelerating earth testing workflows for electrical engineers and site inspectors in Sri Lanka.

Explore our complete range of Earth Resistance Testers — digital earth testers, ground resistance meters, and loop impedance instruments in Sri Lanka!

Equipped with a backlit LCD display, interference voltage warning, and high auxiliary electrode resistance tolerance, the UT522 delivers dependable measurement results across a wide variety of soil conditions and earthing configurations — from urban building earthing to remote telecom and industrial grounding systems.

Technical Specifications

Earth Resistance Range: 0~200Ω / 0~2kΩ / 0~20kΩ (auto range)

Resolution: 0.01Ω (200Ω range)

Accuracy: ±(2%+5dgts) for 200Ω range

Test Method: 3-pole / 2-pole measurement

Test Frequency: ~820Hz

Interference Voltage Detection: AC ≤30V

Auxiliary Electrode Resistance: ≤50kΩ (C), ≤50kΩ (P)

Display: 3¾-digit backlit LCD

Power: 6 × 1.5V AA batteries

Key Features

Auto-Range Selection: Automatically selects the appropriate measurement range for faster, error-free earth testing

Backlit LCD Display: Enables clear reading in low-light conditions such as confined electrical enclosures and outdoor night inspections

Interference Voltage Warning: Built-in alarm alerts users to AC stray currents that may compromise reading accuracy

High Electrode Resistance Tolerance: Maintains accurate readings even with high-resistance auxiliary ground spikes in rocky or dry soil

Dual-Mode Testing: Supports both 3-pole (standard fall-of-potential) and 2-pole simplified testing methods

Applications

Automated earth resistance measurement at multi-point industrial grounding grids

Ground resistance verification for switchgear, panel boards, and distribution transformers

Earth electrode testing for lightning protection and surge protection systems

Periodic grounding compliance checks at commercial and high-rise building electrical systems

Package Includes

1 × UNI-T UT522 Digital Earth Resistance Meter

3 × Test lead wires

2 × Auxiliary earth spikes

6 × AA batteries (installed)

Carrying case

English user manual

For advanced soil resistivity measurement and 4-pole Wenner method testing, consider upgrading to the UNI-T UT572 Soil Resistivity and Earth Resistance Tester.

Downloads

📄 Download UNI-T UT522 Data Sheet
📄 Download UNI-T UT522 User Manual