Additional Features:

• 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
• Professional carrying case
• USB data storage and transfer
• Automatic Frequency Control (AFC) - identifies existing interference and chooses a measurement frequency to minimize its effect, providing 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-toearth ground would see
• Adjustable limits - for quicker testing
• Memory: Internal memory storage up to 1500 records accessible via USB port
• Measuring function: Interference voltage and frequency, earthing resistance 3- and 4-pole with/without clip-on current transformer, resistance 2-pole with ac, 2- and 4-pole with dc
• Display: 4 digit (2999 Digit) - 7 segment liquid crystal display, with improved visibility
• Operation: Central rotary switch and function keys
• Temperature ranges
• Operating temperature range: -10 °C to 50 °C (14° F to 122° F)
• Storage temperature range: -30 °C to 60 °C (-22° F to 140° F)
• Temperature coefficient: ± 0.1 % of range/± 0.1 % of reading/°C <18 °C >28 °C
• Type of protection: IP56 for case, IP40 for battery door according to EN60529
• Safety: Protection by double and/or reinforced insulation. Max. 50 V to earth per IEC61010-1. 300V CAT II, Pollution degree 2
• EMC (Emission Immunity) IEC61326-1: Portable
• Quality standard:Developed, designed and manufactured to comply with DIN ISO 9001
• External field influence: Complies with DIN 43780 (8/76)
• Auxiliary power: 6 x 1.5 V alkaline (IEC LR6 or type AA )
• Battery life span: With IEC LR6/type AA: typ. 3,000 measurements (RE+RH _x001D_ 1 k_x001F_)
• With IEC LR6/type AA: typ. 6,000 measurements (RE + RH > 10 k_x001F_)
• Dimensions (WxHxD): 250 mm x 133 mm x 187 mm (9.75 in x 5.25 in x 7.35 in)
• Case material: Polyester

The new Fluke 1625-2 GEO Earth Ground Tester offers data storage and download capabilities via USB port. World class accessories will simplify and speed up testing time.

Stakeless testing:

The Fluke 1625-2 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.

The most complete testers:

The Fluke 1623-2 and 1625-2 are distinctive earth ground testers that 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)

The testers are also easy to use. For each test, the testers inform you which stakes or clamps need to be connected and the large rotary switch can be used even with a gloved hand.