- 52 -
TABLE OF CONTENTS
1. Safety and operational considerations ............................................................................ 54
1.1 Warnings and notes .........................................................................................................55
1.2 Batteries ...........................................................................................................................56
1.3 Precautions on chraging of new battery cells or cells unused for a longer period ........... 56
2. Instrument description .......................................................................................................57
2.1 Front panel .......................................................................................................................57
2.2 Connector pannel ............................................................................................................. 58
2.3 Back panel .......................................................................................................................58
3. Instrument operation ..........................................................................................................59
3.1 Meaning of symbols and messages on the Instrument display ............................... 59
3.2 The online voltage and output terminal monitor ............................................................... 59
3.3 Message eld – battery status ......................................................................................... 60
3.4 Status eld – measurement warnings/results symbols .................................................... 60
3.5 Sound warnings ............................................................................................................... 61
3.6 Performing measurement ................................................................................................ 61
3.6.1 Measurement function/ sub-function ..........................................................................61
3.6.2 Selecting measurement function/ sub-function .......................................................... 61
3.6.3 Performing tests .........................................................................................................61
3.7 Setup menu ......................................................................................................................61
3.8 Help screen ......................................................................................................................62
4. Measurements ....................................................................................................................62
4.1 Insulation resistance ........................................................................................................ 62
4.2 Continuity ......................................................................................................................... 64
4.2.1 R low test ....................................................................................................................64
4.2.2 Continuity test .............................................................................................................66
4.3 Testing RCDs ...................................................................................................................67
4.3.1 Contact voltage .......................................................................................................... 68
4.3.2 Trip-out time ...............................................................................................................69
4.3.3 Trip-out current ...........................................................................................................71
4.3.4 Autotest ......................................................................................................................72
4.3.5 WARNINGS ................................................................................................................74
4.4 Fault loop impedance and prospective fault current ........................................................ 75
4.4.1 Fault loop impedance ................................................................................................. 75
4.4.2 The fault loop impedance test for RCD protected circuits .......................................... 76
4.5 Line impedance and prospective short-circuit current ..................................................... 77
4.6 Phase sequence testing ...................................................................................................79
4.7 Voltage and frequency ..................................................................................................... 80
4.8 Earth Resistance .............................................................................................................. 82
4.8.1 Earth Resistance (Re) - 3-wire, 4wire ........................................................................82
4.8.2 Specic earth resistance (Ro) .................................................................................... 83
5. Maintenance ........................................................................................................................85
5.1 Replacing fuses ............................................................................................................... 85
5.2 Cleaning ...........................................................................................................................85
5.3 Periodic calibration ........................................................................................................... 85
5.4 Service ............................................................................................................................. 85