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Fluke 1625 Advanced GEO Earth Ground Tester

The Fluke 1625 is the advanced earth ground tester that performs all four types of earth ground tests and includes features that give quicker and more accurate readings.

This product is discontinued or reclassified

Fluke 1625 Advanced GEO Earth Ground Tester
  • Fluke 1625 Advanced GEO Earth Ground Tester
  • Fluke 1625 - testing the ground
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  • The Fluke 1625 is a versatile earth ground tester that can easily perform all four types of earth ground tests.

    Testing Methods

    • 3- and 4-Pole Fall of Potential – standard earth ground testing using two 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.
    • 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
  • RA 3-pole Ground Resistance Measurement (IEC 1557-5)
    Measuring voltage Vm = 20/48 V AC
    Short circuit current 250 mA AC
    Measure frequency 94, 105, 111, 128Hz
    Resolution 0.001 Ω to 100 Ω
    Measuring range 0.001 Ω to 299.9 kΩ
    Intrinsic error ± (2 % of reading + 2 d)
    Operating error ± (5 % of reading + 5 d)
    RA 4-pole Ground Resistance Measurement (IEC 1557-5)
    Measuring voltage Vm = 20/48 V AC
    Short circuit current 250 mA AC
    Measure frequency 94, 105, 111, 128Hz
    Resolution 0.001 Ω to 100 Ω
    Measuring range 0.001 Ω to 299.9 kΩ
    Intrinsic error ± (2 % of reading + 2 d)
    Operating error ± (5 % of reading + 5 d)
    RA 3-pole Ground Resistance Measurement With Current Clamp
    Measuring voltage Vm = 20/48 V AC
    Short circuit current 250 mA AC
    Measure frequency 94, 105, 111, 128Hz
    Resolution 0.001 Ω to 10 Ω
    Measuring range 0.001 Ω to 29.99 kΩ
    Intrinsic error ± (7 % of reading + 2 d)
    Operating error ± (10 % of reading + 5 d)
    RA 4-pole Selective Ground Resistance Measurement With Current Clamp
    Measuring voltage Vm = 20/48 V AC
    Short circuit current 250 mA AC
    Measure frequency 94, 105, 111, 128Hz
    Resolution 0.001 Ω to 10 Ω
    Measuring range 0.001 Ω to 29.99 kΩ
    Intrinsic error ± (7 % of reading + 2 d)
    Operating error ± (10 % of reading + 5 d)
    Stakeless Ground Loop Measurement
    Measuring voltage Vm = 20/48 V AC
    Measure frequency 94, 105, 111, 128Hz
    Noise current (Iext) Max. Iext = 3 A
    Resolution 0.001 Ω to 10 Ω
    Measuring range 0.001 Ω to 29.99 kΩ
    Intrinsic error ± (7 % of reading + 2 d)
    Operating error ± (10 % of reading + 5 d)
    Environmental Specifications
    Working temperature -10 °C to +50 °C
    Operating temperature 0 °C to +35 °C
    Nominal temperature +18 °C to +28 °C
    Storage temperature -30 °C to +60 °C
    Climatic class C1 (IEC 654-1), -5 °C to + 45 °C, 5 % to 95 % RH
    Protection type IP56 for case, IP40 for battery door according to EN 60529
    Safety Specifications
    Safety rating CAT II, 300 V
    Mechanical And General Specifications
    Display 2999 Digit LCD – 7 segment liquid crystal display with special symbols and backlight
    Size 133 mm x 187 mm x 250 mm
    Weight 1.1 kg (including batteries)
    Warranty Two years
    Battery life Typical 3000 measurements (RE+RH ≤ 1 kΩ)

    Typical 6000 measurements (RE+RH ≤ 10 kΩ)

    • Model
      Model Name Description  
      Fluke 1625 Fluke 1625 Advanced GEO Earth Ground Tester
      Advanced GEO Earth Ground Tester

      Includes:

      • 2 Test Leads
      • Batteries
      • Users Manual
    • Cables & Hardware
      Model Name Description  
      Fluke GEO Fluke GEO Earth Ground Cable Reel 25 M Wire  
      Fluke GEO Fluke GEO Earth Ground Cable Reel 50 M Wire  
    • CarePlans
      Model Name Description  
      Fluke-G2P-Group2 Fluke G2P-Group2 Gold CarePlan  
      Fluke G2P-Group4 Fluke G2P-Group4 Gold CarePlan  
      Fluke-S2P-Group2 Fluke S2P-Group2 Silver CarePlan  
      Fluke S2P-Group4 Fluke S2P-Group4 Silver CarePlan  
    • Current Clamps
      Model Name Description  
      Fluke EI 162BN Fluke EI-162BN 320 mm Diameter Split Core Transformer  
    • Manuals
      Title  
      1625 Users Manual Download
      1625 Getting Started Supplement Download
      1625 Statement of Memory Volatility Download
      1623, 1625 CE Declaration of Conformity Download
      1625 用户手册 Download
      1625 Handleiding Download
      1625 Bedienungshandbuch Download
      1625 Manuale per l’uso Download
      1625 Manual do usuário Download
      1625 Mode d'emploi Download
      1625 Uživatelská příručka Download
      1625 Manual de uso Download
    • Application Notes
      Title  
      Maintaining a solid ground Download
      Earth ground testing for mine sites with Fluke 1625 Download
      How to use cable and pole earth ground testers Download
      Principles of earth grounding Download
      Checking ground electrode impedance for commercial, industrial and residential buildings Download
    • Data Sheets
      Title  
      Fluke 1625 Comparison Tool Download
      Fluke 1625 and 1623 - Geo Earth Ground Tester Datasheet Download
      Fluke 1625 - Geo Earth Ground Tester Data Sheet Download
    • Demos
      Title  
      Fluke 1621/1623/1625 Virtual Demo Download
      Earth Ground Resistance - Principles, Testing Methods and Applications Download