MI 3125 InstaltestCOMBO
Table of contents
3
Table of contents
1
Preface ....................................................................................................................5
2
Safety and operational considerations.................................................................6
2.1
Warnings and notes ..........................................................................................6
2.2
Battery and charging .........................................................................................9
2.2.1
New battery cells or cells unused for a longer period ......................................... 10
2.3
Standards applied ...........................................................................................11
3
Instrument description.........................................................................................12
3.1
Front panel ......................................................................................................12
3.2
Connector panel ..............................................................................................13
3.3
Back side.........................................................................................................14
3.4
Display organization ........................................................................................15
3.4.1
Terminal voltage monitor..................................................................................... 15
3.4.2
Battery indication................................................................................................. 15
3.4.3
Message field ...................................................................................................... 15
3.4.4
Result field .......................................................................................................... 16
3.4.5
Sound warnings .................................................................................................. 16
3.4.6
Help screens ....................................................................................................... 16
3.4.7
Backlight and contrast adjustments .................................................................... 17
3.5
Instrument set and accessories.......................................................................18
3.5.1
Standard set MI 3125.......................................................................................... 18
3.5.2
Optional accessories........................................................................................... 18
4
Instrument operation............................................................................................19
4.1
Function selection ...........................................................................................19
4.2
Settings ...........................................................................................................20
4.2.1
Language ............................................................................................................ 20
4.2.2
Initial settings ...................................................................................................... 21
4.2.3
RCD standard ..................................................................................................... 22
4.2.4
Isc factor.............................................................................................................. 23
4.2.5
Commander support ........................................................................................... 23
5
Measurements ......................................................................................................25
5.1
Compensation of test leads resistance............................................................25
5.2
Voltage, frequency and phase sequence ........................................................26
5.3
Insulation resistance........................................................................................28
5.4
Resistance of earth connection and equipotential bonding .............................30
5.4.1
R LOW
Ω
, 200 mA resistance measurement....................................................... 31
5.5
Testing RCDs ..................................................................................................32
5.5.1
Contact voltage (RCD Uc)................................................................................... 33
5.5.2
Trip-out time (RCDt)............................................................................................ 34
5.5.3
Trip-out current (RCD I) ...................................................................................... 35
5.5.4
RCD Autotest ...................................................................................................... 36
5.6
Fault loop impedance and prospective fault current ........................................39
5.7
Line impedance and prospective short-circuit current .....................................41
5.8
Socket outlet test.............................................................................................43
5.9
PE test terminal ...............................................................................................45