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Chauvin Arnoux Mätutrustning C.A 6472

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Earth and resistivity tester

EN - User’s manual

C.A 6472

Denition of measurement categories

Measurement category IV corresponds to measurements taken at the source of low-voltage installations.

Example: power feeders, counters and protection devices.

Measurement category III corresponds to measurements on building installations.

Example: distribution panel, circuit-breakers, machines or xed industrial devices.

Measurement category II corresponds to measurements taken on circuits directly connected to low-voltage installations.

Example: power supply to electro-domestic devices and portable tools.

PRECAUTIONS FOR USE

This instrument is protected from accidental voltages of not more than 50 V with respect to earth in measurement category IV.

The guaranteed level of protection of this equipment may be compromised if used in a manner not specied by the manufacturer.

Make no measurements on conductors likely to be connected to the network or to earth conductors that

are not disconnected.

Do not exceed the maximum rated voltage and current and the measurement category.

Never exceed the protection limits indicated in the specications.

Comply with the conditions of use, namely the temperature, the humidity, the altitude, the degree of pollution, and the place of use.

 Do not use the device or its accessories if they seem damaged.

Use only the charging unit supplied with the tester to recharge the internal battery.

Use connection accessories of which the overvoltage category and service voltage are greater than or equal to those of the

measuring device (50V CAT IV). Use only accessories that comply with safety standards (IEC 61010-2-031 and 32).

Troubleshooting and metrological checks must be done only by accredited skilled personnel.

Wear the appropriate protective gear (insulating boots and gloves).

Foreword:

The potentials on the various rods used for an earth measurement may be di󰀨erent if a nearby electrical installation is defective or

certain weather conditions prevail (thunderstorms). It is up to the operator to decide whether to continue or postpone a campaign

of measurements in a given situation.

WARNING, risk of DANGER! The operator must refer to these instructions whenever this danger symbol appears.

Equipment protected by double insulation.

Earth terminal.

CE marking indicates conformity with European directives, in particular LVD and EMC.

The rubbish bin with a line through it indicates that, in the European Union, the product must undergo selective disposal

in compliance with Directive WEEE 2012/19U/EU. This equipment must not be treated as household waste.

Thank you for purchasing a C.A 6472 earth and resistivity tester. To obtain the best service from your unit:

read these operating instructions carefully,

comply with the precautions for use.

CONTENTS

1. START-UP ................................................................................................................................................................................ 4

1.1. Unpacking 4 .......................................................................................................................................................................

1.2. Characteristics label 4 .......................................................................................................................................................

1.3. Accessories .................................................................................................................................................................... 5

1.4. Replacement parts 6 .........................................................................................................................................................

1.5. Charging the battery 7 .......................................................................................................................................................

2. PRESENTATION OF THE DEVICE ....................................................................................................................................... 8

2.1. Functions of the device 9 ..................................................................................................................................................

2.2. Keypad 9 ...........................................................................................................................................................................

2.3. Display unit 10 ...................................................................................................................................................................

2.4. Operating principle ........................................................................................................................................................11

3. AUTOMATIC MODE .............................................................................................................................................................. 12

3.1. Resistance measurement 12 .............................................................................................................................................

3.2. 3P earth measurement 15 .................................................................................................................................................

3.3. 4P earth measurement 17 .................................................................................................................................................

3.4. Measurement of soil resistivity .................................................................................................................................. 20 r

3.5. Measurement of earth potential V pot. 24 .........................................................................................................................

3.6. Earth measurements with 2 clamps 26 .............................................................................................................................

4. ERROR REPORTING ........................................................................................................................................................... 27

4.1. Electrode resistance too high 27 .......................................................................................................................................

4.2. Out of range 27 ..................................................................................................................................................................

4.3. Misconnection 27 ..............................................................................................................................................................

4.4. Indicators of limits of use 27 ..............................................................................................................................................

5. MEASUREMENTS IN MANUAL MODE .............................................................................................................................. 29

5.1. Choice of measurement frequency 29 ...............................................................................................................................

5.2. Switching of the measurement voltage 29 .........................................................................................................................

5.3. Manual settings for the resistance measurement 30 ........................................................................................................

5.4. Manual settings for the 3P earth measurement ................................................................................................................ 30

5.5. Manual settings for the 4P earth measurement 31 ............................................................................................................

5.6. Manual settings for the soil resistivity measurement 32 ....................................................................................................

5.7. Manual settings for the earth potential measurement 32 ..................................................................................................

5.8. Manual settings for the measurement with 2 clamps 32 ...................................................................................................

5.9. Sweep mode (SWEEP) 32 ................................................................................................................................................

5.10. Smoothing 32 ..................................................................................................................................................................

6. MEASUREMENTS WITH THE PYLON BOX ...................................................................................................................... 33

6.1. Description of the C.A 6474 Pylon Box and AmpFlex

® sensors 33 ..................................................................................

6.2. Measurements in automatic mode 35 ...............................................................................................................................

6.3. Error reporting 39 ..............................................................................................................................................................

6.4. Manual and sweep modes 39 ............................................................................................................................................

7. MEMORY FUNCTION ........................................................................................................................................................... 41

7.1. Storage of measurement results 41 ..................................................................................................................................

7.2. Retrieval of stored results 42 .............................................................................................................................................

7.3. Erasure of the memory 43 .................................................................................................................................................

8. CONFIGURATION (SETUP) ................................................................................................................................................. 45

8.1. Press the CONFIG key 45 .................................................................................................................................................

8.2. Press the DISPLAY key 46 ................................................................................................................................................

8.3. Press the MEM key 46 ......................................................................................................................................................

8.4. Press the key 46MR .........................................................................................................................................................

8.5. Internal parameters 46 ......................................................................................................................................................

8.6. Check of the display unit 47 ..............................................................................................................................................

9. ERROR MESSAGES ........................................................................................................................................................... 48

10. CONNECTION TO A PC AND ANALYSIS SOFTWARE .................................................................................................. 49

11. SPECIFICATIONS TECHNICAL CHARACTERISTICS AND ......................................................................................... 50

11.1. Reference conditions 50 ..................................................................................................................................................

11.2. Electrical characteristics 50 .............................................................................................................................................

11.3. Power supply 56 ..............................................................................................................................................................

11.4. Environmental conditions 57 ............................................................................................................................................

11.5. Characteristics of construction 57 ....................................................................................................................................

11.6. Conformity to international standards 57 .........................................................................................................................

11.7. Electromagnetic compatibility 58 .....................................................................................................................................

12. TERMS AND DEFINITIONS ............................................................................................................................................... 59

13. GLOSSARY.......................................................................................................................................................................... 60

14. MAINTENANCE ................................................................................................................................................................... 62

14.1. Cleaning 62 .....................................................................................................................................................................

14.2. Replacement of the fuse 62 .............................................................................................................................................

14.3. Replacing the battery 63 ..................................................................................................................................................

15. WARRANTY ........................................................................................................................................................................ 65