Fluke 1621 GEO Earth Ground Tester

Product Summary:
The Fluke 1621 GEO Earth Ground Tester is a rugged, portable instrument designed for reliable ground resistance measurements. With single‑button operation, it performs both 3‑pole Fall‑of‑Potential and 2‑pole tests, automatically detects noise voltage, and warns of hazardous voltages.

Key Features:

• Single‑button operation for quick measurements

• 3‑pole Fall‑of‑Potential and 2‑pole resistance modes

• Automatic noise (ghost voltage) detection

• Hazardous voltage warning above 30 V

• Large backlit display for clear readings

• Adjustable limit setting with Pass/Fail alerts

• Rugged holster and compact design (113×54×216 mm)

• CAT II 600 V safety rating

Applications:

• Electrical contractors verifying grounding systems

• Utility test engineers on distribution networks

• Telecom tower and data‑center grounding audits

• Solar and wind power installation commissioning

• Preventive maintenance in industrial plants

Product Benefits:

• Speeds up site testing with single‑button operation

• Ensures accuracy by filtering out stray voltages

• Protects users with hazardous voltage warnings

• Fits easily in a tool bag for field portability

• Limits errors with adjustable Pass/Fail thresholds

FAQs:

Q. How does the Fluke 1621 detect ghost voltages?
It uses automatic noise‑voltage detection to filter out stray voltages, ensuring true ground resistance readings.

Q. Can I measure a ground loop without auxiliary rods?
Yes—use the 2‑pole resistance mode for quick checks when you can’t deploy full Fall‑of‑Potential probes.

Q. What indicates a failed ground test?
If resistance exceeds your preset limit, the large display backlight flashes and an audible alert sounds.