Ht-instruments M71 Manuel d'utilisateur télécharger pdf (Page 2)

M71

EN – 1

Table of contents:

1. SAFETY PRECAUTIONS AND PROCEDURES ......................................................... 2

1.1. Preliminary instructions ..................................................................................................... 3

1.2. During use ........................................................................................................................ 3

1.3. After use ........................................................................................................................... 3

1.4. Definition of measurement category (OVERVOLTAGE) .................................................. 4

2. GENERAL DESCRIPTION .......................................................................................... 5

3. PREPARING THE INSTRUMENT ............................................................................... 5

3.1. Initial check ....................................................................................................................... 5

3.2. Power supply .................................................................................................................... 5

3.3. Calibration ......................................................................................................................... 5

3.4. Storage ............................................................................................................................. 5

4. WORKING INSTRUCTIONS ....................................................................................... 6

4.1. Instrument description ...................................................................................................... 6

4.1.1. SWITCHING ON ............................................................................................................................. 7

4.1.2. AUTO POWER OFF ...................................................................................................................... 7

4.2. Auto mode ........................................................................................................................ 7

4.3. EARTH 2W:Two-wire earth resistance measurement ...................................................... 8

4.3.1. EARTH 2W- ZERO SETTING OF CABLES ........................................................................................ 8

4.3.2. EARTH 2W- MEASUREMENT PROCEDURE .................................................................................. 10

4.3.3. MESSAGE DESCRIPTION FOR EARTH 2W MEASUREMENT ............................................................ 12

4.4. EARTH 3W: Three wire earth resistance measurement ................................................. 13

4.4.1. EARTH 3W- ZERO SETTING OF CABLES ...................................................................................... 13

4.4.2. EARTH 3W- MEASUREMENT PROCEDURE .................................................................................. 15

4.4.3. MESSAGE DESCRIPTION FOR EARTH 3W MEASUREMENT ............................................................ 17

5. MAINTENANCE ........................................................................................................ 19

5.1. General ........................................................................................................................... 19

5.2. Battery replacement ........................................................................................................ 19

5.3. Cleaning .......................................................................................................................... 19

5.4. End of life ........................................................................................................................ 19

6. TECHNICAL SPECIFICATIONS ............................................................................... 20

6.1. Technical features .......................................................................................................... 20

6.1.1. SAFETY STANDARDS ................................................................................................................... 21

6.1.2. GENERAL FEATURES .................................................................................................................. 21

6.2. Environment .................................................................................................................... 21

6.2.1. ENVIRONMENTAL CONDITIONS ..................................................................................................... 21

6.3. Accessories .................................................................................................................... 21

7. SERVICE................................................................................................................... 22

7.1. Warranty terms ............................................................................................................... 22

7.2. After sales service .......................................................................................................... 22

8. PRACTICAL REPORTS FOR ELECTRICAL TESTS ................................................ 23

8.1. Earth resistance measurement in TT systems ............................................................... 23

8.2. Earth resistance measurement, volt ampere metric method .......................................... 24

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Ht-instruments M71 Manuel d'utilisateur Page 2

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