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Fluke 1623-2 Basic GEO Earth Ground Tester

 
Fluke 1623-2
Catalog #: 4325155
         
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BASIC GEO EARTH GROUND TESTER
Free Gift From Fluke With Purchase

Features

  • IP56 rated for outdoor use
  • USB data storage and transfer
  • 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
  • Professional carrying case
In addition, the Fluke 1625-2 offers these advanced features:
  • 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-to-earth ground would see
  • Adjustable limits - for quicker testing
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Compare Products in this Series

Product Name Type Display (3 Pole Testers) Ground Resistance Range Availability Price
1623-2
1623-2
BASIC GEO EARTH GROUND TESTER
3 Pole, 4 Pole Digital 19.99 K Ohms Edu Price Standard Price Gov't Price
1623-2 KIT
1623-2 KIT
BASIC GEO EARTH GROUND TESTER, KIT
3 Pole, 4 Pole Digital 19.99 K Ohms Edu Price Standard Price Gov't Price
1625-2 KIT
1625-2 KIT
ADVANCED GEO EARTH GROUND TESTER, KIT
3 Pole, 4 Pole Digital 299.9 K Ohms Edu Price Standard Price Gov't Price
1625-2
1625-2
ADVANCED GEO EARTH GROUND TESTER
3 Pole, 4 Pole Digital 299.9 K Ohms Edu Price Standard Price Gov't Price
Fluke 1623-2 Basic GEO Earth Ground Tester

Fluke 1623-2 Basic GEO Earth Ground Tester

         
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Product Information

The new Fluke 1623-2 and 1625-2 GEO Earth Ground Testers offer data storage and download capabilities via USB port. World class accessories will simplify and speed up testing time.

Stakeless testing

The Fluke 1623-2 and 1625-2 earth ground testers are 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.

This is for the BASIC system, which only includes the 1623-2 tester and test leads.

The complete model kit (Fluke 1623-2 KIT) comes with the 1623-2 tester, test leads, 4 earth ground stakes, 3 cable reels with wire, 2 clamps, batteries, and manual all inside a professional Fluke carrying case.

What's In The Box

  • Fluke 1623 tester
  • 2 test leads
  • Batteries
  • Users manual

Specifications

1623-2 Specifications

General Specifications
Display:1999 digit LCD Display with special symbols, digit height 25 mm
User interface Instant measurement through TURN and START one button concept. The only operating elements are rotary switch and START button
Robust, water and dust resistant Instrument is designed for tough environmental conditions (rubber protective cover, IP56)
Memory Internal memory storage up to 1500 records accessible via USB port
 
Temperature ranges
Operating temperature -10 °C to 50 °C (14 °F to 122 °F)
Storage temperature -30 °C to +60 °C (-22 °F to +140 °F)
Temperature coefficient ± 0.1 % of reading/°C <18 °C >28 °C
Intrinsic error Refers to the reference temperature range and is guaranteed for 1 year
Operating error Refers to the operating temperature range and is guaranteed for 1 year
Climatic class C1 (IEC 654-1), -5 °C to +45 °C (23° to +115° F), 5 % to 95 % RH
Protective type IP56 for case, IP40 for battery door according to EN60529
Safety Protection by double and/or reinforced insulation. max. 50 V to earth. IEC61010-1: 300V CAT II, Pollution degree 2
EMC (Emission Immunity) IEC61326-1: Portable
Quality system Developed, designed and manufactured according to DIN ISO 9001
External voltage V ext, max = 24 V (dc, ac < 400 Hz), measurement inhibited for higher values
V ext rejection > 120 dB (162⁄3, 50, 60, 400 Hz)
Measuring time Typical 6 sec.
Max. overload 250 V rms (pertains to misuse)
Auxiliary power 6 x 1.5 V alkaline (type AA LR6)
Battery life span Typical > 3,000 measurements
Dimensions (WxHxD) 250 mm x 133 mm x 187 mm (9.75 in x 5.25 in x 7.35 in)
Weight 1.1 kg (2.43 lb) including batteries
7.6 kg (16.8 lb) including accessories and batteries in carrying case
 
RA 3-pole ground resistance measurement (IEC 1557-5)
Switch position Resolution Measuring range Accuracy Operating error
RA 3-pole 0.001 Ω to 10 Ω 0.020 Ω to 19.99 kΩ ± (2 % rdg + 3 d) ± (5 % rdg + 3 d)
For 2-pole measurements connect terminals H and S with the supplied connector cable.
 
Measuring principle: Current and voltage measurement
Measuring voltage Vm = 48 Vac
Short-circuit current > 50 mA
Measure frequency 128 Hz
Probe resistance (RS) Max 100 kΩ
Auxiliary earth electrode resistance (RH) Max. 100 kΩ
Additional error from RH and RS RH [kΩ] • • • RS [kΩ]/RA [Ω] • • • 0.2 %
Monitoring of RS and RH with error indicator
Automatic range selection
Measurement is not performed if the current through the current clamp is too low
 
RA 4-pole ground resistance measurement (IEC 1557-5)
Switch position Resolution Measuring range Accuracy Operating error
RA 4-pole 0.001 Ω to 10 Ω 0.020 Ω to 19.99 kΩ ± (2 % rdg + 3 d) ± (5 % rdg + 3 d)
 
Measuring principle: Current and voltage measurement
Measuring voltage Vm = 48 Vac
Short-circuit current > 50 mA
Measure frequency 128 Hz
Probe resistance (RS + RES) Max 100 kΩ
Auxiliary earth electrode resistance (RH) Max. 100 kΩ
Additional error from RH and RS RH [kΩ] • • • RS [kΩ]/RA [Ω] • • • 0.2 %
Monitoring of RS and RH with error indicator
Automatic range selection
 
RA 3-pole selective ground resistance measurement with current clamp
Switch position Resolution Measuring range Accuracy Operating error
RA 3-pole 0.001 Ω to 10 Ω 0.020 Ω to 19.99 kΩ ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)
 
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage Vm = 48 Vac
Short-circuit current > 50 mA
Measure frequency 128 Hz
Probe resistance (RS) Max 100 kΩ
Auxiliary earth electrode resistance (RH) Max. 100 kΩ
Monitoring of RS, and RH with error indicator
Automatic range selection
Measurement is not performed if the current through the current clamp is too low
 
RA 4-pole selective ground resistance measurement with current clamp
Switch position Resolution Measuring range Accuracy Operating error
RA 4-pole 0.001 Ω to 10 Ω 0.020 Ω to 19.99 kΩ ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)
 
Measuring principle: Current/voltage measurement (with external current clamp)
Measuring voltage Vm = 48 Vac
Short-circuit current > 50 mA
Measure frequency 128 Hz
Probe resistance (RS) Max 100 kΩ
Auxiliary earth electrode resistance (RH) Max. 100 kΩ
Monitoring of RS, and RH with error indicator
Automatic range selection
Measurement is not performed if the current through the current clamp is too low
 
Stakeless ground loop measurement
Switch position Resolution Measuring range Accuracy Operating error
RA 4-pole 0.001 Ω to 0.1 Ω 0.020 Ω to 199.9 Ω ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)
 
Measuring principle: Stakeless measurement of resistance in closed loops using two current transformers
Measuring voltage Vm = 48 Vac (primary)
Measuring frequency 128 Hz
Noise current (IEXT) Max. IEXT = 10 A (ac) (RA < 20 Ω)
Max. IEXT = 2 A (ac) (RA > 20 Ω)
Automatic range selection
The information regarding stakeless ground loop measurements is only valid when used in conjunction with the recommended current clamps at the minimum distance specified.
 

1625-2 Specifications

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 ≤ 1 kΩ)
With IEC LR6/type AA: typ. 6,000 measurements (RE +RH > 10 kΩ)
Dimensions (WxHxD) 250 mm x 133 mm x 187 mm (9.75 in x 5.25 in x 7.35 in)
Weight ≤ 1.1 kg (2.43 lb) without accessories
7.6 kg (16.8 lb) including accessories and batteries in carrying case
Case material Polyester
 
Measurement of interference voltage dc + ac (UST)
Measuring Limits of error: method Fullwave rectification
Measuring Range Display Range Resolution Frequency Range Limits of Error
1 V to 50 V 0.0 V to 50 V 0.1 V dc/ac 45 Hz to 400 Hz sine ± (5 % of rdg + 5 digit)
Measuring sequence approx. 4 measurements/s
Internal resistance approx. 1.5 MΩ
Max. overload Urms = 250 V
 
Measurement of interference frequency (F )
Measuring Range Display Range Resolution Range Accuracy
6.0 Hz to 400 Hz 16.0 Hz to 299.9 Hz to 999 Hz 0.1 Hz to 1 Hz 1 V to 50 V ± (1 % of rdg + 2 digit)
 
Earthing resistance (RE)
Measuring method Current and voltage measurement with probe as IEC61557-5
Open circuit voltage 20/48 V, ac
Short circuit current 250 mA ac
Measuring frequency 94, 105, 111, 128 Hz selected manually or automatic. (AFC) 55 Hz in function R*
Noise rejection 120 dB (162 / 3 , 50 , 60, 400 Hz)
Max. overload Urms = 250 V
 
Electrical measurement specifications
Intrinsic error or influence quantity Reference conditions or specified operating range Designation code Requirements or test in
accordance with the relevant
parts of IEC 1557
Type of test
Intrinsic error Reference conditions A Part 5, 6.1 R
Position Reference position ± 90° E1 Part 1, 4.2 R
Supply voltage At the limits stated by the manufacturer E2 Part 1, 4.2, 4.3 R
Temperature 0 °C and 35 °C E3 Part 1, 4.2 T
Series interference voltage See 4.2 and 4.3 E4 Part 5, 4.2, 4.3 T
Resistance of the probes and
auxiliary earth electrodes
0 to 100 x RA but ≤ 50 kΩ E5 Part 5, 4.3 T
System frequency 099 % to 101 % of the
nominal frequency
E7 Part 5, 4.3 T
System voltage 85 % to 110 % of the nominal voltage E8 Part 5, 4.3 T
Operating error   Part 5, 4.3 R
Measuring Range Display Range Resolution Accuracy Operating Error
0.020 Ω to
300 kΩ
0.001 Ω to 2.999 Ω 0.001 Ω ± ( 2 % of rdg + 2 digit ) ± ( 5 % of rdg + 5 digit )
3.00 Ω to 29.99 Ω 0.01 Ω
30.0 Ω to 299.9 Ω 0.1 Ω
0.300 kΩ to 2.999 kΩ 1 Ω
3.00 kΩ to 29.99 kΩ 10 Ω
30.0 kΩ to 299.9 kΩ 100 Ω
 
Measuring time typ. 8 sec. with a fixed frequency
30 sec. max. with AFC and complete cycle of all measuring frequencies
Measuring error of RH and RS typ. 10 % of RE + RS + RH
Max. probe resistance ≤ 1 MΩ
Max. auxiliary earth electrode resistance ≤ 1 MΩ

Automatic check if error is kept within the limits required by IEC61557-5.

If after a measurement of probe-, auxiliary earth electrode- and earthing resistance, a measurement error of higher than 30 % is assumed because of the influencing conditions (see diagram), the display shows a warning symbol "!" and a notice that RS or RH are too high.

 
Automatic switchover of measuring resolution in dependence to auxiliary earth electrode resistance RH
RH with Umeas = 48 V RH with Umeas = 20 V Resolution
< 300 Ω < 250 Ω 1 mΩ
< 6 kΩ < 2.5 kΩ 10 mΩ
< 60 kΩ < 25 kΩ 100 mΩ
< 600 kΩ < 250 kΩ 1 Ω
 
Selective measurement of the earthing resistance
Measuring method Current and voltage measurement with probe as per EN61557-5 and current measurement in the individual branch with additional current transformer (patent applied for).
Open circuit voltage 20/48 V ac
Short circuit current 250 mA ac
Measuring frequency 94, 105, 111, 128 Hz selected manually or automatically (AFC), 55 Hz (R*)
Noise rejection 120 dB (162 / 3 , 50, 60, 400 Hz)
Max. overload Max. Urms = 250 V (measurement will not be started)
 
Measuring Range Display Range Resolution Intrinsic error* Operating error*
0.020 Ω to 30 kΩ 0.001 to 2.999 Ω 0.001 Ω ± (7 % of rdg + 2 digit) ± (10 % of rdg + 5 digit)
3.00 Ω to 29.99 Ω 0.01 Ω
30.0 Ω to 299.9 Ω 0.1 Ω
0.300 kΩ to 2.999 kΩ 1 Ω
3.00 kΩ to 29.99 kΩ 10 Ω
* With recommended current clamps/transformers.

Fluke 1623-2 Product Specifications Summary:
(for full specs please see the full specs tab or the data sheet)

Ground Testers/3 Pole / 4 Pole Ground Testers Template

Type What's This?3 Pole, 4 Pole
Display (3 Pole Testers) What's This?Digital
Ground Resistance Range What's This?19.99 K Ohms
Accuracy3-pole and 4-pole Ground Resistance Measurement: ± (2 % rdg + 3 d)
Measuring Current50 mA 
Measuring Voltage What's This?48 V 
Measuring Frequency What's This?128 Hz 
Soil Resistivity What's This?Yes
Display Counts1999
Stakeless Capability What's This?Yes 
Power SupplyBattery
CAT Rating What's This?II
CAT Voltage What's This?300 V
Optional Ground Kit Included What's This?No
Auto Ranging What's This?Yes 

Test Equipment General Attributes

Unique Features-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)
Warranty2 YEARS
Calibration IncludedFactory Calibration
Power Supply VoltageBattery Powered
Data Logging What's This?No
Interfaces I/OUSB
IP Rating What's This?IP40, IP56 
Product Weight2.43 LBS
Battery TypeAA 
Product Height5.2 IN
Product Length12.76 IN
Product Width9.88 IN
Shipping Weight5.2 LBS
ECCN Number3A992
HTS/Schedule B Number9030390100
Country of OriginRomania
Shipping Height5.2 IN
Shipping Length12.76 IN
Shipping Width9.88 IN
UPC095969666848

Reviews

Q & A

Q: Why is it important to test ground systems?
A: The US National Electrical Code (NEC) gives two principle reasons for grounding a facility.
• Stabilize the voltage to earth during normal operation.
• Limit the voltage rise created by lightning, line surges or unintentional contact with higher-voltage lines.

Q: What is the benefit of using the Stakeless (Clamp-on) method of testing?
A:
The “stakeless” or “clamp-on” method allows you to measure the impedance of a series loop of ground electrodes. The test is simple and it may be performed on an electrode that is connected to a working electric service.

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