METREL MI 3125 User Manual

MI 3125 InstaltestCOMBO Insulation resistance
29
Insulation resistance measuring procedure
 Select the INS function using the function selector switch.
 Set the required test voltage.
 Enable and set limit value (optional).
 Disconnect tested installation from mains supply (and discharge insulation as
required).
 Connect test cable to the instrument and to the item to be tested (see figure
5.10).
 Press the TEST key to perform the measurement (double click for continuous
measurement and later press to stop the measurement).
 After the measurement is finished wait until tested item is fully discharged.
Figure 5.11: Example of insulation resistance measurement result
Displayed results:
R.........................Insulation resistance
Um......................Test voltage – actual value.

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)