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Fluke 1625 GEO

Earth Tester

Fluke 1625 GEO Earth Ground Testers

The Fluke 1623 and 1625 are distinctive earth ground testers that can perform all four types of earth ground

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The Fluke 1623 and 1625 are distinctive earth ground testers that can perform all four types of earth ground measurement. Specifically, the Fluke 1623 and 1625 testers are 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
  • 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.
 
  
Fluke 1623/1625

Fluke 1623

  • One-button measurement concept
  • 3- and 4-pole earth ground measurement
  • 4-pole soil resistivity testing
  • Selective testing, no disconnection of ground conductor (1 clamp)
  • Stakeless testing, quick ground loop testing (2 clamps)
  • Measuring frequency 128 Hz

Fluke 1625

  • 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
Fluke 1623 Vm = 48 V ac
Fluke 1625 Vm = 20/48 V ac
Short circuit current
Fluke 1623 > 50 mA
Fluke 1625 250 mA ac
Measure frequency
Fluke 1623 128 Hz
Fluke 1625 94, 105, 111, 128Hz
Resolution
Fluke 1623 0.001 Ω to 10 Ω
Fluke 1625 0.001 Ω to 100 Ω
Measuring range
Fluke 1623 0.001 Ω to 19.99 kΩ
Fluke 1625 0.001 Ω to 299.9 kΩ
Intrinsic error
Fluke 1623 ± (2 % of reading + 3 digit)
Fluke 1625 ± (2 % of reading + 2 d)
Operating error
Fluke 1623 ± (5 % of reading + 3 d)
Fluke 1625 ± (5 % of reading + 5 d)
RA 4-pole ground resistance measurement (IEC 1557-5)
Measuring Voltage
Fluke 1623 Vm = 48 V ac
Fluke 1625 Vm = 20/48 V ac
Short circuit current
Fluke 1623 > 50 mA
Fluke 1625 250 mA ac
Measure frequency
Fluke 1623 128 Hz
Fluke 1625 94, 105, 111, 128Hz
Resolution
Fluke 1623 0.001 Ω to 10 Ω
Fluke 1625 0.001 Ω to 100 Ω
Measuring range
Fluke 1623 0.001 Ω to 19.99 kΩ
Fluke 1625 0.001 Ω to 299.9 kΩ
Intrinsic error
Fluke 1623 ± (2 % of reading + 3 d)
Fluke 1625 ± (2 % of reading + 2 d)
Operating error
Fluke 1623 ± (5 % of reading + 3 d)
Fluke 1625 ± (5 % of reading + 5 d)
RA 3-pole ground resistance measurement with current clamp
Measuring Voltage
Fluke 1623 Vm = 48 V ac
Fluke 1625 Vm = 20/48 V ac
Short circuit current
Fluke 1623 > 50 mA
Fluke 1625 250 mA ac
Measure frequency
Fluke 1623 128 Hz
Fluke 1625 94, 105, 111, 128Hz
Resolution
Fluke 1623 0.001 Ω to 10 Ω
Fluke 1625 0.001 Ω to 10 Ω
Measuring range
Fluke 1623 0.001 Ω to 19.99 kΩ
Fluke 1625 0.001 Ω to 29.99 kΩ
Intrinsic error
Fluke 1623 ± (7 % of reading + 3 d)
Fluke 1625 ± (7 % of reading + 2 d)
Operating error
Fluke 1623 ± (10 % of reading + 5 d)
Fluke 1625 ± (10 % of reading + 5 d)
RA 4-pole selective ground resistance measurement with current clamp
Measuring Voltage
Fluke 1623 Vm = 48 V ac
Fluke 1625 Vm = 20/48 V ac
Short circuit current
Fluke 1623 > 50 mA
Fluke 1625 250 mA ac
Measure frequency
Fluke 1623 128 Hz
Fluke 1625 94, 105, 111, 128Hz
Resolution
Fluke 1623 0.001 Ω to 10 Ω
Fluke 1625 0.001 Ω to 10 Ω
Measuring range
Fluke 1623 0.001 Ω to 19.99 kΩ
Fluke 1625 0.001 Ω to 29.99 kΩ
Intrinsic error
Fluke 1623 ± (7 % of reading + 3 d)
Fluke 1625 ± (7 % of reading + 2 d)
Operating error
Fluke 1623 ± (10 % of reading + 5 d)
Fluke 1625 ± (10 % of reading + 5 d)
Stakeless ground loop measurement
Measuring Voltage
Fluke 1623 Vm = 48 V ac
Fluke 1625 Vm = 20/48 V ac
Measure frequency
Fluke 1623 128 Hz (125 Hz on request)
Fluke 1625 94, 105, 111, 128Hz
Noise current (Iext)
Fluke 1623 Max. Iext = 10 A (ac) (RA < 20 Ω)
  Max. Iext = 2 A (ac) (RA < 20 Ω)
Fluke 1625 Max. Iext = 3 A
Resolution
Fluke 1623 0.001 Ω to 0.1 Ω
Fluke 1625 0.001 Ω to 10 Ω
Measuring range
Fluke 1623 0.001 Ω to 199.9 kΩ
Fluke 1625 0.001 Ω to 29.99 kΩ
Intrinsic error
Fluke 1623 ± (7 % of reading + 3 d)
Fluke 1625 ± (7 % of reading + 2 d)
Operating error
Fluke 1623 ± (10 % of reading + 5 d)
Fluke 1625 ± (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
Fluke 1623 -20 °C to +60 °C
Fluke 1625 -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 & General Specifications
Display
Fluke 1623 1999 digit LCD – display with special symbols, digit height 25 mm, fluorescent backlight
Fluke 1625 2999 Digit LCD – 7 segment liquid crystal display with special symbols and backlight
Size
  133 mm x 187 mm x 250 mm
Weight
Fluke 1623 + 1625 1.1 kg (including batteries)
Warranty
  Two years
Battery Life
Fluke 1623 Typical > 3000 measurements
Fluke 1625 Typical 3000 measurements (RE+RH ≤ 1 kΩ)
  Typical 6000 measurements (RE+RH ≤ 10 kΩ)

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Fluke 1625 GEO

Fluke 1625 GEO

Fluke 1625 GEO Earth Ground Testers

The Fluke 1623 and 1625 are distinctive earth ground testers that can perform all four types of earth ground

Write your review

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