Megger MIT2500 MIT Series Insulation Resistance Testers

The Megger MIT2500 is a 2.5 kV insulation and continuity tester designed for motor and cable testing, specialist applications, and electrical testing where operating voltages exceed 1000 V and higher insulation test voltages are required.

This handheld instrument combines insulation testing up to 200 GΩ with fast continuity testing in a rugged, portable package. It features both fixed and variable test voltages, supported by test voltage feedback control that maintains output voltage within 2% of the selected range, even under load .

Key Features

Feature Description

Insulation Testing Up to 2.5 kV and 200 GΩ range

Adjustable Test Voltage 50 V to 2500 V continuously variable

Fixed Test Voltages 50 V, 100 V, 250 V, 500 V, 1000 V, 2500 V

Guard Terminal Eliminates surface leakage currents for high-resistance accuracy

Continuity Testing Single range from 0.01 Ω to 1 MΩ

Diagnostic Tests Polarization Index (PI) & Dielectric Absorption Ratio (DAR)

Stabilized Output Voltage maintained within 2% of selected range under test

Live Circuit Detection Automatic detection and protection

Bluetooth Connectivity Wireless data download

IP Rating IP54 – Dust and water resistant

Safety Rating CAT IV 600 V

Technical Specifications

Insulation Testing

Parameter Specification

Test Voltages (Fixed) 50 V, 100 V, 250 V, 500 V, 1000 V, 2500 V

Variable Voltage Range 50 V to 2500 V (adjustable)

Maximum Measurement 200 GΩ

Short Circuit Current 2 mA (+0 to -50% per EN 61557-2)

Test Current 1 mA at minimum pass values, max 2 mA

Terminal Voltage Accuracy -0 / +2% ±2 V

Guard Terminal Performance <5% error on 500 kΩ parallel circuit resistance with 100 MΩ load

Insulation Accuracy by Voltage :

Test Voltage Measurement Range Accuracy

50 V 10 GΩ ±2% ±2 digits ±4.0% per GΩ

100 V 20 GΩ ±2% ±2 digits ±2.0% per GΩ

250 V 50 GΩ ±2% ±2 digits ±0.8% per GΩ

500 V 100 GΩ ±2% ±2 digits ±0.4% per GΩ

1000 V 200 GΩ ±2% ±2 digits ±0.2% per GΩ

2500 V 200 GΩ ±2% ±2 digits ±0.2% per GΩ

Continuity Testing

Parameter Specification

Measurement Range 0.01 Ω to 1 MΩ

Accuracy (0-100 Ω) ±3% ±2 digits

Accuracy (100 Ω - 500 kΩ) ±5% ±2 digits

Open Circuit Voltage 5 V ±1 V

Test Current 200 mA (-0 mA to +20 mA) for 0.01 Ω to 4 Ω

Lead Null Up to 10 Ω

Polarity Single polarity (default) / Dual polarity (configurable)

Voltage Measurement

Parameter Specification

DC Voltage Range 0 to 600 V

AC Voltage Range 10 mV to 600 V TRMS (sinusoidal, 15 Hz to 400 Hz)

DC Accuracy ±2% ±2 digits

AC Accuracy (sinusoidal) ±2% ±2 digits

AC Accuracy (non-sinusoidal) ±3% ±2 digits (>100 mV), ±8% ±2 digits (10-100 mV)

Frequency Measurement

Parameter Specification

Measurement Range 15 to 400 Hz

Accuracy ±0.5% ±1 digit

Capacitance Measurement

Parameter Specification

Measurement Range 0.1 nF to 10 μF

Accuracy ±5.0% ±2 digits (1 nF to 10 μF)

General Specifications

Parameter Specification

Display Digital with analog arc display

Storage Capacity >1000 test results

Data Download Bluetooth wireless (Class II, range up to 10 m)

Timer Control Countdown timer adjustable to 10 minutes

Power Supply 6 x 1.5 V AA (LR6) alkaline or 6 x 1.2 V NiMH rechargeable

Battery Life 3000 insulation tests (5 sec ON / 55 sec OFF @ 1000 V into 1 MΩ)

Charging Option 12-15 V DC (accessory interface)

Fuse 2 x 500 mA (FF) 1000 V, 32 x 6 mm ceramic, HBC 30 kA min (NO glass fuses)