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Fluke 1625
GEO Earth Ground Testers - Advanced

  • 3 - and 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)
  • Stakeless testing, quick ground loop testing (2 clamps)
  • Earth impedance measurement at 55 Hz
  • Automatic frequency control (AFC) (94, 105, 111, 128 Hz)
  • Measuring voltage switchable 20/48V
  • Programmable limits, settings
  • Continuity with buzzer
  • For the Basic model See Fluke 1623
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Fluke 1625 Shown

Product Information
Datasheet 1.1 MB PDF
Manual 1.2 MB PDF
PDF HelpPDF Help

The Fluke 1625 GEO earth ground tester is a distinctive earth ground testers that can perform all four types of earth ground measurement. Specifically, the Fluke 1625 tester is able to measure earth ground loop resistances using only clamps – called Stakeless testing. This method doesn't require the use of earth ground stakes or the disconnection of ground rods.

Testing Methods
  • 3- and 4-Pole Fall of Potential – standard earth ground testing using two ground stakes
  • 4-Pole Soil Resistivity testing – determine soil resistivity using four ground stakes
  • Selective testing – without disconnecting ground rods, a technician can measure ground resistance using a combination of stakes and a clamp.
  • Stakeless testing – innovative solution using only clamps, instead of ground stakes, to measure earth ground loop resistance.
The Fluke 1625 offers these advanced features:
  • Automatic Frequency Control (AFC) – identifies existing interference and chooses a measurement frequency to minimize its effect, providing a more accurate earth ground value.
  • R* measurement – calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance that a fault-to-earth ground would see.
  • Adjustable limits – for quick test result verification.
Ordering Information
Model Description Buy Online Price
Fluke 1625 Fluke 1625 Advanced GEO Earth Ground Tester Discontinued
See: 1625-2
Fluke 1625 Kit Fluke 1625-Kit Advanced GEO Earth Ground Tester Kit Buy Now $3,799.95
Optional Configuration
Fluke 1623 Fluke 1623 Basic GEO Earth Ground Tester Buy Now $1,699.95
Fluke 1623 Kit Fluke 1623-Kit Basic Geo Earth Ground Tester Kit Buy Now $2,699.95
Included Accessories
Fluke 1625
1625 Accessories
  • 6 - AA LR6 Batteries
  • 2 - Measuring leads 1.5 m
  • 2 - Alligator Clips
  • 1 - Users Manual
1625-KIT Accessories
  • 6 - Test leads
  • 4 - Earth ground stakes
  • 3 - Cable reels with wire (2-25 m, 1-50 m)
  • 2 - Clamps (one inducing, one sensing)
  • 6 - AA LR6 Batteries
  • 1 - Users manual
  • 1 - Rugged carrying case
Optional Accessories
Fluke EI 1623 Fluke EI-1623 Selective/Stakeless clamp set for 1623, Consists of EI-162X and EI-162AC Buy Now Sale $629.96
(Reg. $699.95)
GEO CABLE-REEL 25M Fluke GEO CABLE-REEL 25M Ground/Earth Cable Reel for Earth Ground Testers Discontinued
CABLE REEL 25M BL Fluke GEO Earth Ground Cable 25M Blue Wire Buy Now Sale $60.60
(Reg. $74.95)
GEO CABLE-REEL 50M Fluke GEO CABLE-REEL 50M 50 Meter Ground/Earth Cable Reel for Earth Ground Testers Buy Now Sale $71.95
(Reg. $79.95)
Extended Warranty CarePlans
G1P-GROUP4 Fluke G1P-GROUP4 Gold CarePlan - Extends warranty from one to three years and includes annual NIST traceable calibration(1625 Only) Buy Now $1,061.00
S1P-GROUP4 Fluke S1P-GROUP4 Silver CarePlan - Extends warranty from one to three years(1625 Only) Buy Now Sale $333.90
(Reg. $371.00)