Megger MIT1025 Advanced 10 kV Diagnostic Insulation Resistance Tester, 20 TΩ (126917)

Features

• Measures insulation resistance up to 20 TΩ at 10 kV DC — ideal for diagnostic testing of high voltage cables, motors, generators, transformers, and switchgear
• Full suite of diagnostic tests: IR, Timed IR (IR(t)), DAR, PI, Step Voltage (SV), Dielectric Discharge (DD), and Ramp testing — all standard measurements for high voltage maintenance
• User-settable test voltage in steps as small as 25 V from 40 V to 10 kV — stores as a voltage preset for repeated testing
• Large, clear display shows resistance, voltage, leakage current, capacitance, battery status, and time constant simultaneously — readable in bright sunlight and low-light conditions
• Elapsed test time displayed continuously, removing the need for a separate timer
• High 3 mA short-circuit current with high noise immunity for reliable measurements on large earthing systems with induced voltages
• Lithium-ion battery with ultra-fast charge; mains/line operation possible even with a completely flat battery
• USB Type B interface for real-time output at 1 reading/second and data transfer to Megger PowerDB software
• Guard terminal performance fully specified — eliminates surface leakage current for accurate high-resistance measurements
• Fully dual-cased: IP65 with lid closed, IP40 with lid open
• CAT IV 600V safety rating to IEC 61010-1

Technical Information

• Test Voltage 500V, 1kV, 2.5kV, 5kV, 10kV DC (user-settable in fine steps)
• Max Insulation Resistance 20 TΩ @ 10 kV
• Short Circuit Current 3 mA
• Noise Immunity 3 mA (at 10 kV)
• Test Modes IR, Timed IR, DAR, PI, Step Voltage (SV), Dielectric Discharge (DD), Ramp
• Battery Li-Ion, fast charge
• Mains Operation Yes (even with dead battery)
• Interface USB Type B (device), real-time output 1 reading/second
• Safety Rating CAT IV 600V per IEC 61010-1
• Ingress Protection IP65 (lid closed), IP40 (lid open)
• Operating Temperature -20°C to +50°C
• Storage Temperature -25°C to +65°C
• Humidity 90% RH non-condensing at 40°C
• Dimensions (LxWxH) 315 x 285 x 181 mm
• Weight 4.5 kg

Items Included

• MIT1025 Insulation Resistance Tester
• Li-Ion Battery Pack
• External Battery Charger
• Calibration Certificate
• User Guide

Downloads

Datasheet