Table Of Contents - METREL MI 3122 Instruction Manual

MI 3122 Smartec Z Line-Loop / RCD

Table of contents

1 Preface .................................................................................................................................. 5
2 Safety and operational considerations .............................................................................. 6
2.1 Warnings and notes ........................................................................................................... 6
2.2 Battery and charging .......................................................................................................... 8
2.2.1 New battery cells or cells unused for a longer period ................................................ 9
2.3 Standards applied ............................................................................................................ 10
3 Instrument description ...................................................................................................... 11
3.1 Front panel ....................................................................................................................... 11
3.2 Connector panel .............................................................................................................. 12
3.3 Back site .......................................................................................................................... 13
3.4 Display organization ........................................................................................................ 14
3.4.1 Terminal voltage monitor ......................................................................................... 14
3.4.2 Battery indication ..................................................................................................... 14
3.4.3 Message field ........................................................................................................... 14
3.4.4 Result field ............................................................................................................... 15
3.4.5 Sound warnings ....................................................................................................... 15
3.4.6 Help screens ............................................................................................................ 15
3.4.7 Backlight and contrast adjustments ......................................................................... 16
3.5 Instrument set and accessories ....................................................................................... 17
3.5.1 Standard set............................................................................................................. 17
3.5.2 Optional accessories ................................................................................................ 17
4 Instrument operation ......................................................................................................... 18
4.1 Function selection ............................................................................................................ 18
4.2 Settings ............................................................................................................................ 19
4.2.1 Language ................................................................................................................. 19
4.2.2 Initial settings ........................................................................................................... 20
4.2.3 Memory .................................................................................................................... 21
4.2.4 Date and time........................................................................................................... 21
4.2.5 RCD standard .......................................................................................................... 21
4.2.6 Isc factor .................................................................................................................. 23
4.2.7 Commander ............................................................................................................. 23
5 Measurements .................................................................................................................... 24
5.1 Testing RCDs .................................................................................................................. 24
5.1.1 Contact voltage (RCD Uc) ....................................................................................... 25
5.1.2 Trip-out time (RCDt) ................................................................................................. 26
5.1.3 Trip-out current (RCD I) ........................................................................................... 27
5.1.4 RCD Autotest ........................................................................................................... 27
5.2 Fault loop impedance and prospective fault current ........................................................ 30
5.3 Line impedance and prospective short-circuit current ..................................................... 32
5.4 Voltage, frequency and phase sequence ........................................................................ 34
5.5 PE test terminal ............................................................................................................... 36
6 Data handling ...................................................................................................................... 38
6.1 Memory organization ....................................................................................................... 38
6.2 Data structure .................................................................................................................. 38
6.3 Storing test results ........................................................................................................... 40
6.4 Recalling test results ........................................................................................................ 40
6.5 Clearing stored data ........................................................................................................ 42
6.5.1 Clearing complete memory content ......................................................................... 42
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Table of contents