METREL A 1322, Instruction Manual

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A 1322 / A 1422 Table of contents
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Table of contents
1 Preface ................................................................................................................. 5
2 Safety and operational considerations ............................................................. 6
2.1 Warnings and notes........................................................................................... 6
2.2 Standards applied ............................................................................................. 7
3 Description .......................................................................................................... 8
4 Operation ........................................................................................................... 10
4.1 Connections .................................................................................................... 10
4.2 Power supply considerations ........................................................................... 11
4.3 Working with the adapter ................................................................................. 12
4.4 Instrument data of the adapter ........................................................................ 13
4.5 Status indicators and Messages ...................................................................... 13
5 Measurements ................................................................................................... 15
5.1 Continuity - Earth bond resistance measurement ............................................ 15
5.1.1 Compensation of test leads resistance ..................................................... 16
5.2 Insulation resistance (Riso, Riso-S) and Substitute leakage current (Isub, Isub-
S) measurements ............................................................................................ 16
5.3 Differential leakage current measurement ....................................................... 17
5.4 Touch leakage current measurement .............................................................. 18
5.5 Polarity / Active Polarity test ............................................................................ 19
5.6 3-phase PRCD test ......................................................................................... 20
5.7 Power .............................................................................................................. 21
6 Measurements with A 1422 (according to IEC / EN 60974-4) ......................... 23
6.1 Insulation resistance (supply circuit to protective circuit) ................................. 23
6.2 Insulation resistance (welding circuit to protective circuit) ............................... 24
6.3 Insulation resistance (supply circuit to welding circuit) .................................... 25
6.4 Insulation resistance (supply circuit of Class II equipment to accessible
surfaces) .......................................................................................................... 26
6.5 Welding circuit leakage current ....................................................................... 27
6.6 Primary leakage current .................................................................................. 28
6.7 No-load voltage ............................................................................................... 29
7 Maintenance ...................................................................................................... 30
7.1 Cleaning .......................................................................................................... 30
7.2 Service ............................................................................................................ 30
8 Technical specifications ................................................................................... 31
8.1 Test functions .................................................................................................. 31
8.1.1 Continuity ................................................................................................. 31
8.1.2 Insulation resistance (including S-probe) ................................................. 31
8.1.3 Substitute leakage current (including S-probe) ........................................ 31
8.1.4 Differential leakage current ...................................................................... 31
8.1.5 Touch leakage current .............................................................................. 32
8.1.6 Polarity / active polarity ............................................................................ 32
8.1.7 3-phase portable RCD .............................................................................. 33