🔧 Key Features:

• Wide Measurement Range:

  • Earth Resistance: 0.00Ω to 210.0kΩ (accuracy ±2% + 5)

  • Soil Resistivity: 0.00Ω·m to 9000kΩ·m (via Wenner method: ρ = 2πaR)

  • Earth Voltage: 0.00V to 750V AC (accuracy ±2% + 5)

• Advanced Testing Modes:

  • Selectable test frequencies: 128Hz, 111Hz, 105Hz, 94Hz

  • Automatic ranging for effortless operation

  • Auto frequency control (AFC) to reduce noise interference

  • Data hold and storage of up to 300 test records

  • Overload protection and interference detection

• User-Friendly Interface:

  • LCD backlight for enhanced visibility in dark environments

  • Alarm function for out-of-range conditions

  • Low battery indicator and auto power-off

  • RS232 communication port for data transfer and analysis

• Safety and Durability:

  • Max open-circuit voltage: AC 40V

  • Max short-circuit test current: AC 30mA

  • Withstand voltage: AC 3700V/rms between circuit and casing

  • Adjustable electrode spacing (1m to 200m)

  • 📦 Package Includes:

    • UT523A Tester Unit

    • Standard and simplified test lead sets

    • RS232 communication cable

    • Software CD

    • Carrying case

    • Instruction manual