Fluke 1625 and 1623
Geo Earth Ground Testers
The Fluke 1625 and 1623 Earth Ground
Testers not only measure ground resis- Recommended accessories
tance using the classic “fall of potential
test,” but also enable time saving testing
using “selective” and “stakeless” methods.
“Selective” testing does not require the
electrode under test to be disconnected
during the measurement, thus increas-
ing safety. The simple “stakeless” method EI-1623 EI-1625
Selective/stakeless Selective/stakeless
quickly checks ground connections using clamp set for 1623 clamp set for 1625
two current transformers (probes) clamped
around the ground conductor under test.
Offering “one-button” simplicity, the 1623
Fluke 1625 is an all-in-one earth ground tester, while
the 1625 has extra versatility for more
demanding applications.
The 1623 is perfect for performing
predictive maintenance checks of ES-162P3 ES-162P4
Stake/reel set for Stake/reel set for
commercial and industrial applications. 3-pole measurements 4-pole measurements
The 1625 is intended for electrical utility
or other electrically noisy environments.
Earth ground resistance and soil
resistivity should be measured when:
• Designing earth ground systems
EI-162BN
• Installing new ground system and Split Core Transformer
electrical equipment for use with Fluke 1625
• Periodically testing ground and
lightning protection systems
Fluke 1623
• Installing large electrical equipment Recommended kits
such as transformers, switchgears,
machines, etc.
Specifications
Features 1625 1623 1621
One-button measurement concept — • •
3-pole earth ground measurement • • •
4-pole earth ground measurement • • —
4-pole soil resistivity testing • • —
2-pole resistance measurement ac • • •
2-and 4-pole resistance measurement dc • — —
Selective testing, no disconnection of ground conductor (1 clamp) • • — Fluke 1625 Kit
• Fluke 1625 tester
Stakeless testing, quick ground loop testing (2 clamps) • • —
• Two test leads
Measuring frequency 128 Hz — • • • Four earth ground stakes
Earth impedance measurement at 55 Hz • — — • Three cable reels with wire (2-25 m, 1-50 m)
• • Two clamps (one inducing, one sensing)
Automatic frequency control (AFC), 94 Hz to 128 Hz — —
• Rugged carrying case
Measuring voltage switchable 20 V/48 V • — —
Programmable limits, settings • — •
Continuity with buzzer • — —
Dust/water resistance IP 56 IP 56 IP 40
Safety rating CAT II 300 V CAT II 300 V CAT II 600 V
Two-year warranty • • •
* In favorable conditions (optimal target surface, room temperature) up to 10 m (33 ft). In unfavorable conditions, such
as intensive sunshine, very weak reflecting target surface, or large temperature fluctuations, measuring accuracy may
deteriorate to approx. ± 0.25 mm/m (± 0.003 in/ft) for distances above 10 m (33 ft).
** In favorable conditions (optimal target surface, room temperature) up to 10 m (33 ft). In unfavorable conditions, such as
intensive sunshine, very weak reflecting target surface, or large temperature fluctuations, the deviation over distances
10 m (33 ft) can increase by approx. ± 0.15 mm/m (± 0.0018 in/ft).
Ordering information
Fluke 1623 Kit
Included accessories Models • Fluke 1623 tester
Test leads, alligator clips, users manual. FLUKE-1625 Advanced GEO Earth Ground Tester • Two test leads
• Four earth ground stakes (2 m to 25 m)
FLUKE-1623 Basic GEO Earth Ground Tester
• Three cable reels with wire
Test leads, alligator clips, stake/reel set 4-pole, FLUKE-1625 KIT Advanced GEO Earth Ground Tester Kit (2 m to 25 m, 1 m to 50 m)
selective/stakeless clamp set, rugged carrying case, FLUKE-1623 KIT Basic GEO Earth Ground Tester Kit • Two clamps (one inducing, one sensing)
users manual.
• Rugged carrying case
These products are for unpowered installations measuring grounding connections.
Check price and availability at
www.fluke.com/wtb
22 Earth Ground Testers For more information, go to www.fluke.com/egt
