Fluke 1623 Data sheet

Fluke 1623 and 1625

GEO Earth Ground Testers

The new Fluke 1623 and 1625 GEO Earth Ground Testers offer an innovative solution, called Stakeless testing, to make your earth ground loop resistance testing quicker and easier. No need for a separate earth ground clamp.

• 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

Technical Data

In addition, the Fluke 1625 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-toearth ground would see

• Adjustable limits - for quicker

testing

Stakeless testing

The Fluke 1623 and 1625 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 and 1625 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.

The complete model kit comes with the 1623 or 1625 tester, test leads, 4 earth ground stakes, 3 cable reels with wire, 2 clamps, batteries, and manual—all inside a rugged Fluke carrying case.

1623 Specifications

General

Display:1999 digit LCD Display with special symbols, digit height 25 mm, fluorescent backlight User interface Instant measurement through TURN and START one button concept. The only operating elements are

Robust and waterproof Instrument is designed for tough environmental conditions (rubber protective cover, IP56)

rotary switch and START button

Temperature ranges

Working temperature -10 °C to 50 °C (14 °F to 22 °F) Operating temperature 0 °C to 35 °C (32 °F to 95 °F) Storage temperature -20 °C to 60 °C (-4 °F to 140 °F) Reference temperature 23 °C to ± 2 °C (73 °F to ± 4 °F)

The chart of four temperature ranges for the instrument exist to satisfy European Standards requirements; the instrument can be used over the full working temperature range by using the temperature coefficient to calculate accuracy at the ambient temperature of use.

Temperature coefficient ± 0.1 % of reading/K 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 EMC (Emission Immunity) IEC 61326-1:1997 Class A 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 mignon cells alkali-manganese (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

2 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

RA 3-pole ground resistance measurement (IEC 1557-5)

Switch position Resolution Measuring range Intrinsic error Operating error

RA 3-pole 0.001 Ω to 10 Ω 0.001 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 V ac Short-circuit current > 50 mA Measure frequency 128 Hz (125 Hz on request) Probe resistance (RS) Max 100 k Ω Auxiliary earth electrode resistance (RH) Max. 100 kΩ Additional error from RH and R

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

RH[kΩ]

• ••

RS[kΩ]/RA[Ω]

• ••

0.2 %

RA 4-pole ground resistance measurement (IEC 1557-5)

Switch position Resolution Measuring range Intrinsic error Operating error

4-pole 0.001 Ω to 10 Ω 0.001 Ω to 19.99 kΩ ± (2 % rdg + 3 d) ± (5 % rdg + 3 d)

Measuring principle: Current/voltage measurement

Measuring voltage Vm = 48 V ac Short-circuit current > 50 mA Measuring frequency 128 Hz (125 Hz on request) Probe resistance (RS+ RES) Max. 100 kΩ Auxiliary earth electrode resistance (RH) Max. 100 kΩ Additional error from RH and R

Monitoring of RS, and RH with error indicator Automatic range selection

RH[kΩ]

• ••

RS[kΩ/RA[Ω]

• ••

0.2 %

RA 3-pole selective ground resistance measurement with current clamp (R

)

Switch position Resolution Measuring range Intrinsic error Operating error

RA 3-pole

0.001 Ω to 10 Ω 0.001 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 V ac Short-circuit current > 50 mA Measuring frequency 128 Hz (125 Hz on request) 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

3 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

RA 4-pole selective ground resistance measurement with current clamp (R

)

Switch position Resolution Measuring range Intrinsic error Operating error

RA 4-pole

0.001 Ω to 10 Ω 0.001 Ω to 19.99 kΩ ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)

Measuring principle: Current/voltage measurement (with external current clamp)

Stakeless ground loop measurement ( )

Switch position Resolution Measuring range Intrinsic error Operating error

RA 4-pole 0.001 Ω to 0.1 Ω 0.001 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 V ac (primary) Measuring frequency 128 Hz (125 Hz on request) Noise current (I

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.

) Max. I

EXT

= 10 A (ac) (RA < 20 Ω)

EXT

Max. I

= 2 A (ac) (RA > 20 Ω)

EXT

4 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

1625 Specifications

General

Description Microprocessor controlled, fully automated earth measuring instrument with additional functions Measuring function Interference voltage and frequency, earthing resistance 3- and 4-pole with/without clip-on current transformer,

Display 4 digit (2999 Digit) - 7 segment liquid crystal display, digit size 18 mm (0.71 in) with supplementary signs and

Operation Central rotary switch and function keys

resistance 2-pole with ac, 2- and 4-pole with dc

active illumination

Temperature ranges

Working temperature range -10 °C to 50 °C (14° F to 122° F) Operating temperature range 0 °C to 35 °C (32° F to 95° F) Nominal temperature range 18 °C to 28 °C (64° F to 82° F) Storage temperature range -30 °C to 60 °C (-22° F to 140° F)

Note: The chart of four temperature ranges for the instrument exist to satisfy European Standards requirements; the instrument can be used over the full Working

temperature range by using the temperature coefficient to calculate accuracy at the ambient temperature of use.

Temperature coefficient ± 0.1 % of range/Kelvin Operating errors Refer to operating temperature range and RH < 20 RE, RS < 100 RE

The maximum percentage operating error within the measurement range does not exceed ± 30 % with the measured value as fiducial value, as determined in accordance with Table 1 in the 1625 Users Manual.

The operating error applies under the rated operating conditions given in IEC1557-1 and the following:

• injection of series interference voltages with system frequencies of 400 Hz, 60 Hz, 50 Hz, 16 and S. The rms value of the series interference voltage shall be 3 V;

• resistance of the auxiliary earth electrode and of the probes: 0 to 100 x R

• system voltages between 85 % and 110 % of the nominal voltage and between 99 % and 101 % of the nominal system frequency for measuring equipment with a mains supply and/or measuring equipment deriving its output voltage directly from the distribution system.

but ≤ 50 kΩ;

/3 Hz or with dc voltage respectively across the terminals E (ES)

5 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Limits of error Refer to nominal temperature range

Climate class C1 (IEC 654-1), -5 °C to 45 °C, 5 % to 95 % RH Type of protection IP56 for case, IP40 for battery door according to EN60529 Max voltage

socket to socket

= 0 V

rms

Sockets ” “ to each other in any combination, max. U

= 250 V (pertains to misuse)

rms

EMC (Emission Immunity) IEC 61326-1:1997 Class A 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 alkali-manganese-batteries (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

≤ 5.5 kg (12.13 lb) incl. accessories and batteries in carrying case

Case material NORYL, shock -and scratch proof thermoplast

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 U

= 250 V

rms

Measurement of interference frequency (F )

Measuring method Measurement of oscillation period of the interference voltage

Measuring Range Display Range Resolution Range Limits of Error

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 U

= 250 V

rms

6 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Electrical measurement specifications

Intrinsic error or influence quantity

Reference conditions or specified operating range

Designation

code

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

Requirements or test in

Supply voltage At the limits stated by the

E2 Part 1, 4.2, 4.3 R

manufacturer 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

0 to 100 x RA but ≤ 50 kΩ E5 Part 5, 4.3 T auxiliary earth electrodes

System frequency 99 % to 101 % of the

E7 Part 5, 4.3 T

nominal frequency System voltage 85 % to 110 % of the nominal voltage E8 Part 5, 4.3 T Operating error Part 5, 4.3 R

A = intrinsic error En = variations R = routine test T = type test

Measuring Range Display Range Resolution Instrinsic Error Max. Operating Error

0.020 Ω to 0.001 Ω to 2.999 Ω 0.001 Ω ± ( 2 % of rdg + 2 digit ) ± ( 5 % of rdg + 5 digit ) 300 kΩ 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

Additional error because of probe-and auxiliary earth electrode resistance

Measuring error of RH and RS typ. 10 % of RE + RS + R

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.

7 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Automatic switchover of measuring resolution in dependence to auxiliary earth electrode resistance R

RH with U

< 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

= 48 V RH with U

meas

= 20 V Resolution

meas

Selective measurement of the earthing resistance (R

Measuring method Current and voltage measurement with

Open circuit voltage 20/48 V ac Short circuit current 250 mA ac Measuring frequency 94, 105, 111, 128 Hz selected manually

Noise rejection 120 dB (162/3, 50, 60, 400 Hz) Max. overload Max. U

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)

0.300 to 2.999 kΩ 1 Ω

* With recommended current clamps/transformers.

)

probe as per EN61557-5 and current measurement in the individual branch with additional current transformer (patent applied for).

or automatically (AFC), 55 Hz (R*)

= 250 V (measurement will

rms

not be started)

3.00 to 29.99

Ω 0.01 Ω

30.0 to 299.9 Ω 0.1 Ω

3.00 to 29.99 kΩ 10 Ω

Additonal error because of probe- and auxiliary earth typ. electrode resistance

Measuring error of RH and R

Typ. of 10 % of R

ETOTAL

+ RS + R

Measuring time Typ. 8 sec. with a fixed frequency 30 sec. max. with AFC and complete cycle of

all measuring frequencies

Minimal current in single branch to be measured 0.5 mA With transformer (1000:1)

0.1 mA With transformer (200:1)

Max. interference current through transformer 3 A With a transformer (1000:1)

8 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Resistance measurement (R~)

Measuring method Current and voltage measurement Measuring voltage 20 V ac, square pulse Short circuit current > 250 mA ac Measuring frequency 94, 105, 111, 128 Hz selected manually or automatically (AFC)

Measuring range Display range Resolution Intrinsic error Operating errors

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)

3.0 Ω to 29.99 Ω 0.01 Ω 30 Ω to 299.9 Ω 0.1 Ω

300 Ω to 2999 Ω 1 Ω

3.0 kΩ to 29.99 kΩ 10 Ω

30.0 kΩ to 299.9 kΩ 100 Ω

Measuring time typ. 6 sec. Max. interference voltage 24 V, with higher voltages measurement will not be started Max overload U

max. = 250 V

rms

Resistance measurement (R )

Measuring method current- voltage measurement as per IEC61557-4 possible Open circuit voltage 20 V dc Short circuit current 200 mA dc Formation of measured value with 4-pole measurement wires on H, S, ES can be extended without additional error.

Resistances > 1 Ω in wire E can cause additional error of 5m Ω/Ω.

Measuring range Display range Resolution Intrinsic error Operating error

0.020 Ω to 3 kΩ 0.001 Ω to 2.999 Ω 0.001 Ω ± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)

3.0 Ω to 29.99 Ω 0.01 Ω

30.0 Ω to 299.9 Ω 0.1 Ω 300 Ω to 2999 Ω 1 Ω

Measuring sequence Approx. 2 measurements/s Measuring time Typ. 4 sec. incl. reversal of polarity (2-pole or 4-pole) Max. interference voltage ≤ 3 V ac or dc, with higher voltages measurement will not be started Max inductivity 2 Henry Max. overload U

= 250 V

rms

Compensation of lead resistance (RK)

Compensation of lead resistance (RK) can be switched on in functions RE 3-pole, RE 4-pole , R~ , and R 2-pole Formation of measured value R

* Value of setpoint entry RK = 0.000 Ω, variable from 0.000 to 29.99 Ω by means of measuring adjustment.

display

= R

measured

- R

compensated

9 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Selection guide by user

Industrial

Maintenance

Technician

• •

Power Utilities

and Telecom

Fluke 1623

Fluke 1625

Field Service

Technician

• •

Standard earth ground test methods

Fall of Potential Selective Stakeless

Fluke 1623

Fluke 1625

3-pole 4-pole/soil 1 clamp 2 clamps

• • • •

Ordering information

Fluke-1623 Kit Basic GEO Earth Ground Tester Kit Fluke-1623 Basic GEO Earth Ground Tester EI-1623 Selective/Stakeless Clamp Set for 1623 Fluke-1625 Kit Advanced GEO Earth Ground Tester Kit Fluke-1625 Advanced GEO Earth Ground Tester EI-1625 Selective/Stakeless Clamp Set for 1625

Optional accessories

ES-162P3 Stake Set for 3-Pole Measurement ES-162P4 Stake Set for 4-Pole Measurement Earth Stake Ground/Earth Stake Cable-Reel 25 m Ground/Earth Cable Reel 25 m (81.25 ft) Cable-Reel 50 m Ground/Earth Cable Reel 50 m (162.5 ft) EI-162BN 320 mm (12.6 in) Split Core Transformer

10 Fluke Corporation 1623 and 1625 GEO Earth Ground Testers

Fluke. Keeping your world up and running.

Fluke Corporation PO Box 9090, Everett, WA USA 98206

Fluke Europe B.V. PO Box 1186, 5602 BD Eindhoven, The Netherlands

For more information call: In the U.S.A. (800) 443-5853 or Fax (425) 446-5116 In Europe/M-East/Africa +31 (0) 40 2675 200 or Fax +31 (0) 40 2675 222 In Canada (800) 36-FLUKE or Fax (905) 890-6866 From other countries +1 (425) 446-5500 or Fax +1 (425) 446-5116 Web access: http://www.fluke.com

Fluke 1623 Data sheet

Specifications and Main Features

Frequently Asked Questions

User Manual