FLUKE-1625-2 - FLUKE - Datasheet.Live

Technical Data

Fluke 1623-2

and 1625-2

GEO Earth Ground Testers

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.

Product 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

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

Stakeless testing

The Fluke 1623-2 and 1625-2

earth ground testers are able to

measure earth ground loop resis-

tances 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.

The complete model kit comes

with the 1623-2 or 1625-2

tester, test leads, 4 earth ground

stakes, 3 cable reels with wire,

2 clamps, batteries, and manual—

all inside a professional Fluke

carrying case.

2 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

General

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 Ω0.020 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.

1623-2 Specifications

3 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

Measuring principle: Current and voltage measurement

Measuring voltage Vm = 48 V ac

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 RSRH[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 Ω0.020 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

Probe resistance (RS+ RES)Max. 100 kΩ

Auxiliary earth electrode resistance (RH)Max. 100 kΩ

Additional error from RH and RSRH[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 (RA )

Switch position Resolution Measuring range Accuracy Operating error

RA 3-pole 0.001 Ω to 10 Ω0.020 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 V ac

Short-circuit current > 50 mA

Measuring 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 (RA )

Switch position Resolution Measuring range Accuracy Operating error

RA 4-pole 0.001 Ω to 10 Ω0.020 Ω to 19.99 kΩ± (7 % rdg + 3 d) ± (10 % rdg + 5 d)

4 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

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

Measuring voltage Vm = 48 V ac

Short-circuit current > 50 mA

Measuring 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 Ω0.020 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 V ac (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.

12MKH

k Hz

VmA

nFmH

Test

Limit

HSESE

1625 LCD update

artwork

october 8, 2012

version 2

Reference Image

1:1 Artwork

5 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

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

Max voltage

socket to socket

Urms = 0 V

Sockets ” “ to each other in any combination, max. Urms = 250 V (pertains to misuse)

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

General

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

1625-2 Specifications

6 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

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 method Measurement of oscillation period of the interference voltage

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 kΩE5 Part 5, 4.3 T

System frequency 99 % 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

A = intrinsic error

En = variations

R = routine test

T = type test

7 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

Measuring

Range Display Range Resolution Accuracy Operating Error

0.020 Ω to 0.001 Ω to 2.999 Ω0.001 Ω± ( 2 % of rdg + 2 digit ) ± ( 5 % of rdg + 5 digit )

300 kΩ3.00 Ω to 29.99 Ω0.01 Ω

30.0 Ω to 299.9 Ω0.1 Ω

0.300 kΩ to 2.999 kΩ1 Ω

3.00 kΩ to 29.99 kΩ10 Ω

30.0 kΩ to 299.9 kΩ100 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 + 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 Ω1 mΩ

< 6 kΩ< 2.5 kΩ10 mΩ

< 60 kΩ< 25 kΩ100 mΩ

< 600 kΩ< 250 kΩ1 Ω

Selective measurement of the

earthing resistance (RE )

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 kΩ0.001 to 2.999 Ω0.001 Ω± (7 % of rdg + 2 digit) ± (10 % of rdg + 5 digit)

3.00 to 29.99 Ω0.01 Ω

30.0 to 299.9 Ω0.1 Ω

0.300 to 2.999 kΩ1 Ω

3.00 to 29.99 kΩ10 Ω

* With recommended current clamps/transformers.

8 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

Additonal error because of probe- and auxiliary earth

typ. electrode resistance

Measuring error of RH and RSTyp. of 10 % of RE TOTA L + RS + RH

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)

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 Accuracy Operating errors

0.020 Ω to 300 kΩ0.001 Ω to 2.999 Ω0.001 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 Ω0.1 Ω

300 Ω to 2999 Ω1 Ω

3.0 kΩ to 29.99 kΩ10 Ω

30.0 kΩ to 299.9 kΩ100 Ω

Measuring time typ. 6 sec.

Max. interference voltage 24 V, with higher voltages measurement will not be started

Max overload Urms max. = 250 V

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 Accuracy Operating error

0.020 Ω to 3 kΩ0.001 Ω to 2.999 Ω0.001 Ω± (2 % of rdg + 2 digit) ± (5 % of rdg + 5 digit)

3.0 Ω to 29.99 Ω0.01 Ω

30.0 Ω to 299.9 Ω0.1 Ω

300 Ω to 2999 Ω1 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 Urms = 250 V

9 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

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 Rdisplay = Rmeasured - Rcompensated*

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

Stakeless ground loop measurement ( )

Switch position Resolution Measuring range Accuracy Operating error

RA 4-pole 0.001 Ω to 0.1 Ω0.02 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

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.

10 Fluke Corporation 1623-2 and 1625-2 GEO Earth Ground Testers

Ordering information

Fluke-1623-2 Kit Basic GEO Earth Ground Tester Kit

Fluke-1623-2 Basic GEO Earth Ground Tester

EI-1623 Selective/Stakeless Clamp Set for 1623

Fluke-1625-2 Kit Advanced GEO Earth Ground Tester Kit

Fluke-1625-2 Advanced GEO Earth Ground Tester

EI-1625 Selective/Stakeless Clamp Set for 1625

Optional accessories

ES-162P3-2 Stake Set for 3-Pole Measurement

ES-162P4-2 Stake Set for 4-Pole Measurement

EARTH STAKE Ground/Earth Stake

CABLE REEL 25M BL Ground/Earth Cable Reel 25 m (81.25 ft)

CABLE REEL 25M GR Ground/Earth Cable Reel 25 m (81.25 ft)

CABLE REEL 50M RD Ground/Earth Cable Reel 50 m (162.5 ft)

EI-162BN 320 mm (12.6 in) Split Core Transformer

EI-162X Clip-on Current Transformer (Sensing)

with Shielded Cable Set

EI-162AC Clip-on Current Transformer (Inducing)

Selection guide by user

Field Service

Technician

Industrial

Maintenance

Technician

Power Utilities

and Telecom

Fluke 1623-2 • •

Fluke 1625-2 • •

Standard earth ground test methods

Fall of Potential Selective Stakeless

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

Fluke 1623-2 ••••

Fluke 1625-2 ••••

Fluke Corporation

PO Box 9090, Everett, WA 98206 U.S.A.

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

without notice. Printed in U.S.A. 11/2013 2634980C-EN

Modification of this document is not permitted without

written permission from Fluke Corporation.

Fluke. The Most Trusted Tools

in the World.