Megger MIT1025 User Manual

21
Measurement Techniques
Understanding Measurement Currents
Insulation resistance is defined as the dc test voltage divided
by the total current flowing in an insulator. The total current
has four components; capacitive current, absorption current,
conductance current and leakage current.
In the case of dry insulation, conductance current may be
negligible and the leakage current may be low, in which case
the absorption current will dominate the total current
measured.

Megger MIT1025 Specifications

General

Display	LCD
Safety Rating	CAT IV 600 V
Short Circuit Current	5 mA
Interface	USB
Operating Temperature	-20°C to +50°C
Storage Temperature	-25°C to +65°C
Test Voltage	50 V, 100 V, 250 V, 500 V, 1000 V, 2500 V, 5000 V, 10000 V
Power Supply	Rechargeable battery
Accuracy	±5% up to 1 TΩ
Data Storage	1000 test results
Test Current	1 mA
Power Supply (Alternative)	Mains Power