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Fluke 1625 Advanced GEO Earth Ground Testers


Fluke 1625 Advanced GEO Earth Ground Testers

Model: 1625

An advanced 3- and 4-point ground tester with soil resistivity, stakeless clamp testing. Includes automatic frequency control for accurate readings every time and switchable 24/48V DC test voltages. Available as a stand-alone unit or a comp


Ordering Information

Fluke 1625 Advanced GEO Earth Ground Tester

An advanced 3- and 4-point ground tester with soil resistivity, stakeless clamp testing. Includes automatic frequency control for accurate readings every time and switchable 24/48V DC test voltages.

$2,799.95


Fluke 1625 Kit Advanced GEO Earth Ground Tester Kit

Includes the Fluke 1625 earth ground resistance tester for 3- and 4-point testing plus short-range ground resistance test kit with cables and ground stakes

$3,799.95


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Fluke 1625 GEO Earth Ground Tester

The Fluke 1625 is intended for electrical utility or other high frequency environments as it has extra versatility for more demanding applications.

The Fluke 1625 is a distinctive earth ground tester that can perform all four types of earth ground measurement. Not only measure ground resistance using the classic 'fall of potential test' but also enable time saving testing using the 'selective' and 'stakeless' methods. 'Selective' testing does not require the electrode under test to be disconnected during the measurement, thus increasing safety. The simple 'stakeless' method quickly checks ground connections using two current transformers (probes) clamped around the ground conductor under test.


Testing Methods

  • 3- and 4-pole Fall of Potential, earth resistance loop testing
  • 4-pole Soil Resistivity testing
  • Selective earth ground rod testing using 1 clamp
  • Stakeless earth ground rod testing using 2 clamps
  • IP56 rated for outdoor use
  • Rugged carrying case

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.

The Fluke 1625 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)

Stakeless Testing

The Fluke 1625 earth ground tester is able to measure earth ground loop resistances using only clamps. With this test method, two clamps are placed around the earth ground rod and each are connected to the tester. No earth ground stakes are used at all. A known, fixed voltage is induced by one clamp and the current is measured using the second clamp. Then the tester automatically determines the resistance of the earth ground rod.

This test method only works if a bonded earth ground system exists for the building or structure under test, but most are. If there is only one path to ground, like at many residential applications, the Stakeless method will not provide an acceptable value and the Fall of Potential test method must be used.

With Stakeless testing, the earth ground rod does not need to be disconnected-leaving the bonded earth ground system intact during test. Gone are the days of spending time placing and connecting stakes for each earth ground rod on your system-a major time saver. You can also perform earth ground tests in places you've not considered before: inside buildings, power pylons, or anywhere you don't have access to soil.


Included with the Fluke 1625:

  • Fluke 1625 tester
  • 2 test leads
  • 2 alligator clips
  • Batteries
  • Users manual

Included with the Fluke 1625 Kit:

  • Fluke 1625 tester
  • 2 test leads
  • 2 alligator clips
  • 4 earth ground stakes
  • 3 cable reels with wire (2-25 m, 1-50 m)
  • selective/stakeless clamp set (one inducing, one sensing)
  • Batteries
  • Users manual
  • Rugged carrying case

Key Features

  • 2-Pole Resistance Test
  • 3-Pole Fall-of-Potential Test
  • 4-Point Soil Resistivity Test
  • 4-Pole Fall-of-Potential Test
  • Adjustable Hi/Low Alarm
  • Adjustable Hi/Low Alarm adjustable high alarm
  • Automatic Frequency Control
  • Calculates Earth Ground Impedance
  • Continuity
  • Dangerous Voltage Indicator
  • Interference Detection
  • Interference Frequency measures interference frequency
  • Interference Voltage measures interference voltage
  • Low Battery Indicator
  • Resistance 300kω max resistance
  • Resolution 0.001ω max resolution
  • Selective Conductor Testing
  • Stakeless Ground Testing
  • Switchable Measuring Voltage
  • Test While De-Energized
  • Test While Energized

Specifications

RA 3-pole ground resistance measurement (IEC 1557-5)
  Fluke 1623 Fluke 1625
Measuring Voltage Vm = 48 V ac Vm = 20/48 V ac
Short circuit current > 50 mA 250 mA ac
Measure frequency 128 Hz 94, 105, 111, 128Hz
Resolution 0.001 Ω to 10 Ω 0.001 Ω to 100 Ω
Measuring range 0.001 Ω to 19.99 kΩ 0.001 Ω to 299.9 kΩ
Intrinsic error ± (2 % of reading + 3 digit) ± (2 % of reading + 2 d)
Operating error ± (5 % of reading + 3 d) ± (2 % of reading + 2 d)
RA 4-pole ground resistance measurement (IEC 1557-5)
Measuring Voltage Vm = 48 V ac Vm = 20/48 V ac
Short circuit current > 50 mA 250 mA ac
Measure frequency 128 Hz 94, 105, 111, 128Hz
Resolution 0.001 Ω to 10 Ω 0.001 Ω to 100 Ω
Measuring range 0.001 Ω to 19.99 kΩ 0.001 Ω to 299.9 kΩ
Intrinsic error ± (2 % of reading + 3 d) ± (2 % of reading + 2 d)
Operating error ± (5 % of reading + 3 d) ± (5 % of reading + 5 d)
RA 4-pole selective ground resistance measurement with current clamp
Measuring Voltage Vm = 48 V ac Vm = 20/48 V ac
Short circuit current > 50 mA 250 mA ac
Measure frequency 128 Hz 94, 105, 111, 128Hz
Resolution 0.001 Ω to 10 Ω 0.001 Ω to 100 Ω
Measuring range 0.001 Ω to 19.99 kΩ 0.001 Ω to 299.9 kΩ
Intrinsic error ± (7 % of reading + 3 d) ± (7 % Of reading + 2 d)
Operating error ± (10 % of reading + 5 d) ± (10 % of reading + 5 d)
Stakeless ground loop measurement
Measuring Voltage Vm = 48 V ac Vm = 20/48 V ac
Measure frequency 128 Hz (125 Hz on request) 94, 105, 111, 128Hz
Noise current (Iext) Max. Iext = 10 A (ac) (RA < 20 O) Max. Iext = 2 A (ac) (RA < 20 O) Max. Iext = 3 A
Resolution 0.001 Ω to 0.1 Ω 0.001 Ω to 10 Ω
Measuring range 0.001 Ω to 19.99 kΩ 0.001 Ω to 299.9 kΩ
Intrinsic error ± (7 % of reading + 3 d) ± (7 % Of reading + 2 d)
Operating error ± (10 % of reading + 5 d) ± (10 % of reading + 5 d)
Environmental Specifications
Working temperature -10 °C to +50 °C
Operating Temperature 0 °C to +35 °C
Storage Temperature -20 °C to +60 °C -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 1999 digit LCD – display with special symbols, digit height 25 mm, fluorescent backlight 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 + Fluke 1625 1.1 kg (including batteries)
Warranty Two years
Battery Life Typical > 3000 measurements Typical 3000 measurements (RE+RH = 1 kΩ) Typical 6000 measurements (RE+RH = 10 kΩ)

Popular Accessories

Click on a category to view a selection of the most popular accessories compatible with the Fluke 1625 Advanced GEO Earth Ground Testers.

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