Field Instruments

Product Overview

The Fluke 1625-2 GEO Earth Ground Resistance Meter is the advanced model in Fluke’s GEO earth ground tester series, designed for power utilities, industrial maintenance teams, telecom engineers, and field service professionals.

It performs all four standard earth ground test methods and includes advanced features such as Automatic Frequency Control (AFC) and R* measurement for improved accuracy in environments with electrical interference.

With IP56-rated rugged construction, USB data storage, and internal memory for up to 1500 records, the 1625-2 is built for demanding outdoor and utility applications.

Key Features

• 3- and 4-pole Fall-of-Potential ground resistance testing
• 4-pole soil resistivity testing
• Selective testing using 1 clamp
• Stakeless testing using 2 clamps
• Automatic Frequency Control (AFC) – minimizes interference
• R* measurement – calculates ground impedance at 55 Hz
• Adjustable test limits for faster pass/fail evaluation
• USB data storage and transfer
• Internal memory up to 1500 records
• Large 4-digit LCD display (2999 count)
• IP56 rated – dust and water resistant
• Rugged rubber protective housing
• Simple rotary switch operation

Technical Specifications

Manufacturer Information

• Manufacturer: Fluke
• Model: 1625-2 GEO Earth Ground Tester

General Specifications

• Display: 4-digit (2999 count) LCD
• Memory: 1500 records (USB accessible)
• Operating Temperature: -10 °C to +50 °C
• Storage Temperature: -30 °C to +60 °C
• Protection Rating: IP56 (case), IP40 (battery door)
• Safety: IEC61010-1, Double/Reinforced insulation
• EMC: IEC61326-1
• Power Supply: 6 × AA alkaline batteries
• Battery Life:

• ~3000 measurements (low resistance)

• Up to ~6000 measurements (higher resistance)
  • Dimensions: 250 × 133 × 187 mm
  • Weight: 1.1 kg (without accessories)

Ground Resistance Measurement

3-Pole / 4-Pole Fall of Potential

• Measuring Range: 0.020 Ω to 300 kΩ
• Resolution: 0.001 Ω
• Accuracy: ±(2% rdg + 2 digit)

Selective Measurement (With Clamp)

• Measuring Range: 0.020 Ω to 30 kΩ
• Accuracy: ±(7% rdg + 2 digit)

Stakeless Measurement (2 Clamps)

• Measuring Range: 0.02 Ω to 199.9 Ω
• Accuracy: ±(7% rdg + 3 digit)

Soil Resistivity Testing

• 4-pole measurement method
• Multiple selectable test frequencies
• AFC automatic interference suppression

Interference & Frequency Measurement

• Interference Voltage: 1 V to 50 V
• Interference Frequency: 6 Hz to 400 Hz
• Noise Rejection: 120 dB

Scope of Delivery (Advanced Kit Version)

• Fluke 1625-2 Earth Ground Tester
• Test leads
• 4 earth ground stakes
• 3 cable reels with wire
• 2 current clamps
• Batteries
• User manual
• Professional Fluke carrying case

Applications

• Utility and substation grounding verification
• Telecom tower grounding inspection
• Industrial earthing system testing
• Lightning protection system verification
• Soil resistivity surveys
• Preventive maintenance grounding audits

Why Buy from FieldInstruments.lk? (Fluke 1625-2)

• 100% Genuine Fluke Instruments – Original products with manufacturer warranty
• Competitive pricing with fast island-wide delivery
• Trusted supplier for professional power, utility & industrial test equipment
• Local warranty support and technical assistance
• Reliable after-sales service and calibration guidance
• Expert consultation for grounding compliance and utility standards

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk