METREL MI 3125 User Manual

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 LOWΩ, 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

METREL MI 3125 Specifications

General

Type	Multifunction Installation Tester
Insulation Resistance	Yes
Continuity Test	Yes
Loop Impedance	Yes
RCD Testing	Yes
Voltage Measurement	Yes
Frequency Measurement	Yes
Display	LCD
Power Supply	6 x 1.5 V AA batteries
Loop Resistance Resolution	0.01 Ω
Frequency	45 - 65 Hz
Line Voltage Resolution	1 V
Insulation Resistance Test Voltage	50 V, 100 V, 250 V, 500 V, 1000 V
Insulation Resistance Resolution	0.01 MΩ
Continuity Resistance Resolution	0.01 Ω
Test Current	200 mA
DC Voltage	Up to 600 V
Loop Resistance	0.0 Ω - 1999 Ω
Line Voltage	Up to 550 V
Line Voltage Accuracy	±2% ±2 digits
Rated Residual Current	10 mA, 30 mA, 100 mA, 300 mA, 500 mA
Insulation Resistance Range	0.01 MΩ to 1 TΩ
Continuity Resistance	0.0 Ω - 1999 Ω
Dimensions	220 x 103 x 55 mm
Operating Temperature	-10°C to 50°C
Storage Temperature	-20°C to +60°C
Safety Standards	EN 61557
Loop Resistance Accuracy	±(5% + 3 digits)