Megger MIT485/2 Insulation Tester 50 V, 100 V, 250 V, 500 V 100 GΩ (1004-742)

Electrical insulation can degrade over time, leading to dangerous faults or costly downtime. The Megger MIT485/2 insulation tester provides reliable verification of insulation integrity in a rugged, portable instrument. It measures insulation resistance at selectable test voltages of 50 V, 100 V, 250 V, and 500 V, with a maximum resistance reading of 100 GΩ. The tester also performs continuity testing with a 200 mA test current and measures AC/DC voltage up to 600 V.

Who is it for

Electricians, maintenance technicians, and electrical contractors who need to test insulation on motors, cables, transformers, and switchgear. It is suitable for both installation testing and routine maintenance in industrial, commercial, and residential settings.

Main features

• Insulation test voltages: 50 V, 100 V, 250 V, 500 V
• Maximum insulation resistance: 100 GΩ
• Continuity test with 200 mA current, range 0.01 Ω to 1 MΩ
• Voltage measurement: 0 to 600 V AC/DC
• Backlit LCD display with analog arc
• Bluetooth connectivity for data transfer
• Powered by 6 x AA batteries
• IP54 rated for dust and water resistance
• Live circuit detection and test timer function
• Guard terminal for accurate high-resistance measurements
• Internal memory for storing test results
• Test lead compensation and auto power off

Specifications

• Insulation test voltages: 50 V, 100 V, 250 V, 500 V
• Maximum insulation resistance: 100 GΩ
• Insulation test current: 1 mA nominal at rated voltage
• Continuity test current: 200 mA
• Continuity resistance range: 0.01 Ω to 1 MΩ
• Voltage measurement range: 0 to 600 V AC/DC
• Safety rating: CAT IV 600 V
• Display: Backlit LCD with analog arc
• Connectivity: Bluetooth
• Power source: 6 x AA batteries
• IP rating: IP54
• Measurement functions: Insulation Resistance, Continuity, AC/DC Voltage, Capacitance, Frequency
• Live circuit detection: Yes
• Test timer function: Yes
• Guard terminal: Yes
• Internal memory: Yes
• Test lead compensation: Yes
• Auto power off: Yes

Tips

For best results, always null the test leads before making continuity measurements. When testing insulation, start with a lower voltage and increase if necessary to avoid damaging sensitive equipment. Use the guard terminal to eliminate surface leakage currents on cables and improve accuracy.