UNI-T UT522 Digital Earth Resistance Meter

UNI-T UT522 Digital Earth Resistance Meter in Sri Lanka

Auto-Ranging Ground Resistance Meter

The UNI-T UT522 Digital Earth Resistance Meter is an auto-ranging instrument for measuring earth electrode resistance and ground resistance using 3-pole or 2-pole methods. It is suitable for electricians and site inspectors in Sri Lanka who need faster, repeatable earth pit testing at commercial buildings, industrial facilities and utility installations. Explore our complete range of earth resistance testers in Sri Lanka.

Automatic range selection removes the need to manually switch between measurement ranges, helping speed up multi-point grounding inspections. The backlit LCD supports use in dim electrical rooms and outdoor locations, while interference-voltage detection helps flag AC voltage that could affect readings.

Technical Specifications

Earth Resistance Range

0~200Ω | 0~2kΩ | 0~20kΩ | auto range

Resolution

0.01Ω on the 200Ω range

Accuracy

±(2% + 5 digits) on the 200Ω range

Test Methods

3-pole and 2-pole earth resistance measurement

Test Frequency

Approximately 820Hz

Interference Voltage Detection

AC up to 30V

Auxiliary Electrode Resistance

Up to 50kΩ for current (C) and potential (P) electrodes

Display

3¾-digit backlit LCD

Power

6 × 1.5V AA batteries

Key Features

Auto-Ranging Measurement

Automatically selects the suitable resistance range for quicker field testing

Backlit Display

Improves readability in low-light electrical rooms and outdoor inspection areas

Interference Voltage Warning

Alerts the user to AC stray voltage that may interfere with the measurement

3-Pole and 2-Pole Testing

Supports standard fall-of-potential testing and simplified two-wire measurement

High Auxiliary Resistance Tolerance

Accepts auxiliary electrode resistance up to 50kΩ for challenging soil-contact conditions

Applications

• Earth resistance checks at switchgear, distribution boards and transformers
• Grounding verification for factories, warehouses and commercial buildings
• Earth electrode testing for lightning protection and surge protection systems
• Routine earthing compliance inspections across multiple test points

Buying Guidance

The UT522 is a strong choice when you want the convenience of auto-ranging for routine earth pit testing. If your work also requires soil resistivity measurement or 4-pole Wenner testing, consider the UNI-T UT572 Advanced Earth Ground Tester. For non-invasive clamp testing on parallel earthing systems, see the UNI-T UT575B Double Clamp Stakeless Earth Tester.

Package Includes

• 1 × UNI-T UT522 Digital Earth Resistance Meter
• 3 × Test leads
• 2 × Auxiliary earth spikes
• 6 × AA batteries
• Carrying case
• English user manual

Downloads

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