Application Note

Earth ground products
Fluke 1625-2 Advanced GEO Earth Ground Tester Fluke 1623-2 Basic GEO Earth Ground Tester
The most complete tester
The Fluke 1623-2 and 1625-2 are distinctive earth ground testers that can
perform all four types of earth ground measurement:
• 3-and 4-pole Fall-of-Potential (using stakes)
• 4-pole soil resistivity testing (using stakes)
• Selective testing (using 1 clamp and stakes)
• Stakeless testing (using 2 clamps only)
The complete model kit comes with the Fluke 1623-2 or 1625-2 tester, a set of
two leads, 4 earth ground stakes, 3 cable reels with wire, 2 clamps, batteries
and manual—all inside a rugged Fluke carrying case.
Fluke 1625-2 advanced features
Advanced features of the Fluke 1625-2 include:
• Automatic Frequency Control (AFC)—identifies existing interference and
chooses a measurement frequency to minimize its effect, providing more
accurate earth ground values
• R* Measurement—calculates earth ground impedance with 55 Hz to more
accurately reflect the earth ground resistance that a fault-to-earth ground
would see
• Adjustable Limits —for quicker testing
Optional accessories
320 mm (12.7 in) Split Core Transformer—for performing selective testing on
individual legs of towers.
Comparing earth ground testers
Product Fall of Potential Selective Stakeless 2-Pole method
3-Pole 4-Pole/Soil 1 Clamp 2 Clamp 2 Pole
Fluke 1621
Fluke 1623-2
Fluke 1625-2
Fluke 1630
Product
The complete kit
Fluke 1630 kit
Fluke Corporation
PO Box 9090, Everett, WA 98206 U.S.A.
Fluke Europe B.V.
PO Box 1186, 5602 BD
Eindhoven, The Netherlands
For more information call:
In the U.S.A. [phone] or
Fax [phone]
In Europe/M-East/Africa [phone] or
Fax [phone]
In Canada (800)-36-FLUKE or
Fax [phone]
From other countries [phone] or
Fax [phone]
Web access: http://www.fluke.com
©2013-2014 Fluke Corporation.
Specifications subject to change without notice.
Printed in U.S.A. 3/2014 4346628B_EN
Modification of this document is not permitted
without written permission from Fluke Corporation.
Fluke. The Most Trusted Tools
in the World.