DT-9399 Earth Ground Clamp Meter | Ground Loop Resistance Tester | 0.025Ω-1500Ω Range | Leakage Current & 32,760 Data Logging

DT-9399 Earth Ground Clamp Meter - Professional Ground Loop Resistance Tester with Data Logging

The DT-9399 Earth Ground Clamp Meter is a professional-grade electrical testing instrument designed for quick, accurate, and non-invasive measurement of ground loop resistance and AC leakage current. Eliminate the need for auxiliary test stakes and disconnecting ground connections—this clamp meter delivers precise readings from 0.025Ω to 1500Ω and leakage current up to 40A, making it the ideal tool for electrical contractors, facility maintenance teams, and industrial inspectors.

Key Features & Benefits

• Non-Invasive Ground Testing: Measure ground loop resistance without disconnecting the ground electrode or using auxiliary stakes. Perfect for indoor, paved, or hard-to-reach areas where traditional stake methods are impossible.

• AC Leakage Current Detection: Identify dangerous AC leakage currents from 0.2mA to 40A without interrupting your grounding system, enhancing safety and preventing equipment damage.

• High-Capacity Data Logging: Stores up to 32,760 measurements in internal memory for later review, trend analysis, and compliance reporting.

• Rugged Industrial Design: Heavy-duty clamp jaws maintain alignment and calibration in tough environments. The robust housing withstands drops, dust, and harsh job site conditions.

• High Accuracy & Wide Range: Delivers industry-standard accuracy (from 1.5% + 0.02Ω on low ranges) across a broad measurement span (0.025Ω to 1500Ω).

Technical Specifications

Earth Ground Loop Resistance:

• 0.025Ω to 0.249Ω: Accuracy ±1.5% + 0.02Ω

• 0.250Ω to 0.999Ω: Accuracy ±1.5% + 0.05Ω

• 1.000Ω to 9.999Ω: Accuracy ±1.5% + 0.10Ω

• 10.00Ω to 49.99Ω: Accuracy ±1.5% + 0.30Ω

• 50.00Ω to 99.99Ω: Accuracy ±1.5% + 0.50Ω

• 100.0Ω to 199.9Ω: Accuracy ±3.0% + 1.0Ω

• 200.0Ω to 399.9Ω: Accuracy ±5.0% + 5.0Ω

• 400Ω to 599Ω: Accuracy ±10.0% + 10Ω

• 600Ω to 1500Ω: Accuracy ±20.0%

Earth Ground Leakage Current:

• 0.200mA to 3.999mA: Resolution 1µA, Accuracy ±2.0% rdg ±0.05mA

• 4.00mA to 39.99mA: Resolution 10µA, Accuracy ±2.0% rdg ±0.03mA

• 40.0mA to 399.9mA: Resolution 100µA, Accuracy ±2.0% rdg ±0.3mA

• 0.400A to 3.999A: Resolution 1mA, Accuracy ±2.0% rdg ±0.003A

• 4.00A to 39.99A: Resolution 10mA, Accuracy ±2.0% rdg ±0.030A

General Specifications:

• Display: Large LCD with backlight

• Memory Storage: 32,760 readings

• Size (HxWxD): 288mm x 95mm x 45mm

• Weight: 1260g (including battery)

• Power Supply: 9V battery (included)

• Operating Temperature: -10°C to 50°C

• Storage Temperature: -20°C to 60°C

Package Contents:

• DT-9399 Earth Ground Clamp Meter

• Gift box with carrying case

• 9V battery

• User manual

Applications & Use Cases

• Industrial Facility Maintenance: Regular ground system checks in manufacturing plants, factories, and processing facilities

• Telecommunications & Data Centers: Ensure proper grounding for sensitive electronic equipment and communication towers

• Electrical Contracting Services: Quick on-site ground resistance testing during installation and maintenance work

• Utility & Power Distribution: Monitor grounding systems in substations, transformer stations, and power lines

• Commercial Building Management: Routine safety inspections in offices, hospitals, schools, and shopping centers

• Renewable Energy Installations: Ground testing for solar farms, wind turbines, and renewable energy systems