Megger MIT410/2 CAT IV Insulation Tester

The Megger MIT410/2 is a CAT IV 600V insulation and continuity tester engineered for electrical diagnostics across industrial, utility, telecommunications, and commercial applications. It combines insulation resistance measurement to 200 GΩ, continuity testing, and live circuit detection in a single instrument designed for field reliability.

– Technical Specifications

Insulation Resistance Testing
• Test voltages: 50 V, 100 V, 250 V, 500 V, 1000 V DC
• Variable test voltage: 10 V to 1000 V in 10 V steps
• Test voltage accuracy: ±2% / −0% (stabilized), limiting overvoltage to 2% vs. industry standard 10–20%
• Measurement range: 0 to 200 GΩ
• Measurement accuracy at 1000 V: 200 GΩ ±2% ±2 digits ±0.2% per GΩ
• Diagnostic functions: Polarization Index (PI), Dielectric Absorption Ratio (DAR), timed insulation tests
• PASS/FAIL threshold indication
• Live circuit detection with user-selectable inhibit threshold (default 50 V)

Continuity Testing
• Measurement range: 0.01 Ω to 1 MΩ (auto-ranging, single range)
• Test current: 20 mA or 200 mA selectable
• Accuracy at 0–100 Ω: ±3% ±2 digits
• Lead resistance compensation (NULL): up to 10 Ω
• Auto reverse polarity supported
• Selectable buzzer with user-adjustable limit

Voltage Measurement
• AC: 10 mV to 600 V TRMS, 15 Hz to 400 Hz
• DC: 0 to 600 V
• AC accuracy: ±2% ±1 digit
• DC accuracy: ±2% ±2 digits
• Service error per BS EN 61557-1: ±2.0% ±2d (0–300 V AC/DC), ±5.1%
• Non-sinusoidal waveforms: ±3% ±2 digits (>100 mV to 600 V TRMS)

– Key Features

• Voltage stabilization limits overvoltage stress on test circuits
• Test lock function for continuous insulation measurement
• Live voltage detection prevents unsafe testing on energized circuits
• Dual test current options optimize measurement of different circuit impedances

– Typical Applications

Electrical installation diagnostics, motor testing, automotive systems, avionics, utilities, industrial maintenance, telecommunications infrastructure.