Fluke 1625-2 Operating Manual

1625-2

Earth/Ground Tester

January 2014

Users Manual

LIMITED WARRANTY AND LIMITATION OF LIABILITY

Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is two years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption.

Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country.

Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period.

To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point).

THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY.

Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision.

Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A.

Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands

11/99

To register your product online, visit register.fluke.com.

Title Page

Introduction ........................................................................................................ 1

How to Contact Fluke ......................................................................................... 2

Safety Information .............................................................................................. 3

Storage ............................................................................................................... 4

Models and Accessories .................................................................................... 5

Additional Accessories ....................................................................................... 6

Features ............................................................................................................. 7

Display ............................................................................................................... 9

Setup .................................................................................................................. 13

Batteries ......................................................................................................... 13

Description of Functions ................................................................................ 15

Operation ........................................................................................................... 16

Advanced Operation .......................................................................................... 16

Power On Functions ...................................................................................... 16

Control Loop .............................................................................................. 17

Measurement Loop ................................................................................... 19

Correct Measurement Connection (Socket Allocation) Check .................. 19

Interference - Voltages and Frequencies Measurement ........................... 19

Earthing Resistances Measurement .............................................................. 20

3-Pole/4-Pole Measurement of Earthing Resistance .................................... 21

Measurement of Single Earth Electrode Resistances in Mesh Operated

Earthing Systems Using Selective Clamp Method ........................................ 23

3-Pole/4-Pole Measurement of Single Earth Electrode Resistances ........ 24

Measurements on High Voltage Pylons .................................................... 26

Clip-On Transformer Errors Correction ..................................................... 29

Compensation of Earth Electrode Connecting Lead ................................. 31

Measurement of Soil Resistivity .................................................................... 32

Measurement of Resistances ........................................................................ 34

Resistance Measurement (R~) ................................................................. 34

Resistance Measurement (R) ................................................................ 35

Compensation of Measuring Lead Resistance ......................................... 36

How to Change All Data Settings with Personalized CODE ......................... 37

Export Stored Data to PC .................................................................................. 39

Delete Stored Data ............................................................................................. 40

Maintenance ....................................................................................................... 41

Calibration .......................................................................................................... 41

Service ............................................................................................................... 41

Specifications ..................................................................................................... 42

1625-2

Users Manual

List of Tables

Table Title Page

1. Symbols .................................................................................................................. 4

2. Models and Accessories ........................................................................................ 5

3. Features and Functions .......................................................................................... 8

4. Display Elements .................................................................................................... 9

5. Display Descriptions ............................................................................................... 10

6. Control Loop Parameters ....................................................................................... 18

7. Data Settings .......................................................................................................... 37

8. Sample .CSV File for Logged Data ........................................................................ 39

9. Operational Error Calculation ................................................................................. 43

iii

1625-2

Users Manual

List of Figures

Figure Title Page

1. External Current Transformer EI-162BN ................................................................ 6

2. Battery Insertion ..................................................................................................... 14

3. Method for Earthing Resistances Measurement .................................................... 20

4. 3-Pole/4-Pole Measurement of Earthing Resistance - Process ............................. 21

5. Measurement of Single Earth Electrode Resistances in Mesh Operated

Earthing Systems ................................................................................................... 23

6. 3-Pole/4-Pole Measurement of Single Earth Electrode Resistances ..................... 24

7. Earthing Resistance without Disengaging the Overhead Earth Wire ..................... 26

8. Correcting Clip-on Transformer Errors ................................................................... 29

9. Clip-on Transformer Connection ............................................................................ 30

10. Compensation of Earth Electrode Connecting Lead .............................................. 31

11. Measurement of Soil Resistivity ............................................................................. 32

12. Resistance Measurement (R~) .............................................................................. 34

13. Resistance Measurement (R) ............................................................................. 35

14. Compensation of Measuring Lead Resistance ...................................................... 36

1625-2

Users Manual

vi 1

Introduction

The 1625-2 Earth Ground Tester (Tester or Product) is a compact, field-rugged instrument that performs all four types of earth ground measurement. Specifically, the Tester is able to measure earth ground loop resistances using only clamps – called Stakeless testing. This method doesn’t require the use of earth ground stakes or the disconnection of ground rods.

The Tester features:

• One-button measurement concept

• 3-pole and 4-pole earth ground measurement

• 4-pole soil resistivity testing

• Selective testing, no disconnection of ground conductor (1 clamp)

• Stakeless testing, quick ground loop testing (2 clamps)

• Measuring frequency 94, 105, 111, 128 Hz

The Tester includes these advanced features:

• Automatic Frequency Control (AFC) – identifies existing interference and chooses a

measurement frequency (94, 105, 111, 128 Hz) 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.

At locations involving the generation, distribution and consumption of electrical energy, certain safety measures must be met in order to protect human life. In many cases, these safety measures are national and international regulations which must be checked regularly. Grounding, the connection of exposed conductive parts to the earth in case of a fault, represents the most fundamental safety measure. There are requirements for grounding of transformers, high and medium voltage power pylons, railway tracks, tanks, vats, foundations and lightning protection systems.

1625-2

Users Manual

The effectiveness of grounding systems should be checked using a earth/ground tester such as the 1625-2 which checks the effectiveness of connections to the ground. The 1625-2 provides the perfect solution by combining the latest technology into a compact, field-rugged instrument. In addition to performing standard 3-pole and 4-pole ground resistance measurements, an innovative process accurately measures individual earth electrode resistances in single and meshed earthed systems without disconnecting any parallel electrodes. One specific application of this capability is quick and accurate measurement of power pylon grounds. The 1625-2 has automatic frequency control (AFC) to minimize interference. Before measuring, the instrument identifies existing interference and selects a measurement frequency to minimize its effect.

Notes

• The terms earth and earthing also refer to ground and grounding and is used

interchangeably throughout this manual.

• For stakeless earth resistance measurements, the Selective/Stakeless

Clamp Set (EI-1623) must be purchased. (The1625-2 Kit includes this clamp set.)

• Selective measurements are described in the main section of this manual.

How to Contact Fluke

To contact Fluke, use one of these telephone numbers:

• USA: 1-800-760-4523

• Canada: 1-800-36-FLUKE (1-800-363-5853)

• Europe: +31 402-675-200

• Japan: +81-3-6714-3114

• Singapore: +65-6799-5566

• Anywhere in the world: +1-425-446-5500

Or, visit Fluke's website at www.fluke.com.

Go to www.fluke.com to register your product, download manuals, and find more information.

To view, print, or download the latest manual supplement, visit

http://us.fluke.com/usen/support/manuals.

Earth/Ground Tester

Safety Information

A Warning identifies hazardous conditions and procedures that are dangerous to the user. A Caution identifies conditions and procedures that can cause damage to the Product or the equipment under test.

 Warning

To prevent possible electrical shock, fire, or personal injury:

• Read all safety information before you use the Product.

• Use the Product only as specified, or the protection supplied by

the Product can be compromised.

• Do not use the Product if it operates incorrectly.

• Do not use the Product if it is damaged.

• Do not use test leads if they are damaged. Examine the test leads

for damaged insulation, exposed metal, or if the wear indicator shows. Check test lead continuity.

• Do not use the Product around explosive gas, vapor, or in damp

or wet environments.

• Do not apply more than the rated voltage, between the terminals

or between each terminal and earth ground.

• Use only current probes, test leads, and adapters supplied with

the Product.

• Do not use a current measurement as an indication that a circuit

is safe to touch. A voltage measurement is necessary to know if a circuit is hazardous.

• The battery door must be closed and locked before you operate

the Product.

• Replace the batteries when the low battery indicator shows to

prevent incorrect measurements.

• Do not connect directly to mains.

• Do not touch voltages >30 V ac rms, 42 V ac peak, or 60 V dc.

1625-2

Users Manual

Table 1 is a list of symbols used on the Tester and in this manual.

Table 1. Symbols

Symbol Description

 Risk of Danger. Important information. See Manual.

 Conforms to relevant Australian EMC requirements.

Storage

If the Tester is stored for an extended period of time or is not in use for a long time, you should remove the batteries.



Hazardous voltage. Risk of electrical shock.

 Battery Indicator

 Conforms to European Union directives.





Conforms to relevant South Korean EMC Standards.

This product complies with the WEEE Directive (2002/96/EC) marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation” product. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.

Earth/Ground Tester

Models and Accessories

These standard accessories were shipped with your Tester:

• 6 alkaline AA – type (LR6) batteries

• 2 measuring leads 1.5 m

• 1 connector cable (for RA 2-pole measurements)

• 2 alligator clips

• 1 Documentation CD with Users Manual

• Quick Reference Guide

• Safety Information

Table 2 is a list of the models and accessories.

Table 2. Models and Accessories

Description Part Number

1625-2 Earth Ground Tester (Includes Users Manual, Safety Information, QRG, Geox Probe Cable, 2 clips, Lead set)

4325162

1625-2 Kit Earth Ground Tester Kit (Includes Users Manual, Safety Information, QRG, Geox Probe Cable, 2 clips, Lead set, 4 Earth Stakes, 3 Cable Reels, C1620 Carrying Case, EI162X, EI-162AC)

162x-7001 Service Replacement Kit (Includes Lead set & 2 clips)

Earth Stake 4325492

ES-162P3-2 Stake Set for 3-Pole Measurement (Includes 3 Earth Stakes, 1 Cable Reel 25M Blue, 1 Cable Reel 50M Red) 4359377

ES-162P4-2 Stake Set for 4-Pole Measurement (Includes 4 Earth Stakes, 1 Cable Reel 25M Blue, 1 Cable Reel 25M Green, 1 Cable Reel 50M Red)

EI-1623 Selective/Stakeless Clamp Set for 1623-2/1625-2 (Includes EI-162X, EI-162AC)

EI-162X Clip-on Current Transformer (sensing) with shielded cable set 2577132

EI-162AC Clip-on Current Transformer (inducing) 2577144

EI-162BN Split Core Transformer - for Pylon Testing (12.7 inch - 320 mm) 2577159

Shielded Cable (Used w/ EI-162X Clamp) 2630254

4325181

2577167

4359389

2577115

Cable Reel, 25M, Blue wire 4343731

Cable Reel, 25M, Green wire 4343746

Cable Reel, 50M, Red wire 4343754

C1620 Carrying Case 4359042

1625-2

Users Manual

Additional Accessories

An external current transformer is available as an option, see Figure 1. The transformer has a transformation ratio between 80 and 1200:1 for the measurement of a single branch in mesh-operated earthing systems. This enables the user to measure on high voltage pylons without separating the overhead earth wires or earth strips at the bottom of the pylons. It is also used to measure lightning protection systems without separating the individual lightning protection wires.

NORMA

1000

500

A 6805 06211

200

Figure 1. External Current Transformer EI-162BN

 Transformer half (2)

Transformer end faces have bolts that pivot to aid in separating the Transformer halves. One Transformer end face has a slotted bolt hole that allows the bolt to pivot out of the end face.

 Transformation ratio connections: ⊥, 200, 500, and 1000  Fastener (2)

evx01.eps

Earth/Ground Tester

Features

The 1625-2 Earth/Ground Tester (Tester) is an earth resistance meter with fully automated measuring frequency selection process. The Tester includes automatic testing of probe and auxiliary earth electrode resistances and possible interference voltages in accordance with DIN IEC61557-5/EN61557-5:

• Measurement of interference voltage (U

• Measurement of interference frequency (F

• Measurement of probe resistance (R

• Measurement of auxiliary earth electrode resistance (R

• Measurement of earthing resistance 3-pole, 4-pole, (R

external clip-on current transformer for selective measurement of single earthing branches in mesh operated earthing systems 

• Resistance measurement 2-pole with ac voltage (R~)

• Resistance measurement with dc voltage 2-pole, 4-pole, (R)

With its various possibilities of measurement and the fully automated measuring sequence control (incl. automatic frequency control AFC), this instrument offers the latest measuring technology in the field of earthing resistance measurements. By means of the selectable limit input with visual and acoustical confirmation/error message and with the code programmable and customer defined special functions, such as measuring voltage 20 V (for agricultural systems), earthing impedance R* (measuring frequency 55 Hz) switched on or off, these instruments are individually programmable for use as a simple meter as well as a high end fully automated measuring device.

)

) with or without using the

The Tester includes automatic testing of probe, auxiliary earth electrode resistances, and possible interference voltages.

See Table 3 for a list of features and functions.

 Warning

• No voltage permissible to sockets .

• Do not open or close the instrument with force.

• Disconnect all leads before opening the instrument.

1625-2

Users Manual

Table 3. Features and Functions

Rear Side

14 13

edw006.eps

No. Description

 Rotary switch to select measurement function and ON/OFF

 "START TEST" button to start the selected measurement function

 "DISPLAY MENU" button to select the setting or show test data

 "CHANGE ITEM" button to change the selected setting value

 "SELECT" button to confirm the setting value

 Liquid crystal display (LCD)

 Connection "H/C2" for auxiliary earth (4 mm ø)

 Connection "S/P2" for probe (4 mm ø)

 Connection  to sense current test clamp

 Connection "ES/P1" for earth electrode probe (4 mm ø)

 Connection "E/C1" for the earth/ground electrode to be measured (4 mm ø)

 USB Type B Port

 Battery compartment for 6 alkaline batteries (type AA, LR6)

 Screws to fasten the battery compartment

Earth/Ground Tester

Display

The display is a 4-digit (2999 Digit), 7 segment liquid crystal display (Table 4).

Table 4. Display Elements

edw004.eps

Item Description

Test Type

UST Interference voltage (AC + DC)

FST Frequency of interference voltage

FM Frequency of measuring voltage

UM Measuring voltage limit 20/48 V



RE Earthing resistance

Auxiliary earth electrode resistance

Probe resistance

Compensation resistance

R1, R2 Low voltage measurement with polarity indication

R ~ AC- resistance

R* Earthing impedance (measuring frequency 55 Hz)

 Measurement

 Measurement Unit: V, Ω, kΩ, Hz

Symbols Key

 Recognition of current transformer socket

 Socket recognition

 Measuring circuit ( E-S,E-H ) interrupted or measured value unstable

 Error

 Measuring sequence in process

 Limit value/Limit value exceeded

 Warning for exceeded limit

 Battery level indicator

+ 39 hidden pages

Fluke 1625-2 Operating Manual

Users Manual

Table of Contents

List of Tables

List of Figures

Introduction

How to Contact Fluke

Safety Information

Storage

Models and Accessories

Additional Accessories

Features

Display