Extech MG310 isolationsmåler 250V 500V 1000V 5,5 GΩ

The Extech MG310 insulation tester delivers test voltages of 250V, 500V, and 1000V with insulation resistance measurement up to 5.5 GΩ, making it a robust choice for professional electrical maintenance and troubleshooting.

Overview

This insulation measuring device is engineered for evaluating the integrity of electrical insulation in motors, cables, transformers, and switchgear. It offers three selectable test voltages to accommodate various insulation classes and application requirements.

What stands out

• Insulation resistance range: 0.001 MΩ to 2000 MΩ (2 GΩ) with basic accuracy of ±(3% + 5 digits)
• Measures AC/DC voltage from 0.1V to 600V and resistance from 0.01 Ω to 20 kΩ
• Continuity test with audible buzzer (<35Ω)
• Polarization Index (PI) and Dielectric Absorption Ratio (DAR) for advanced insulation diagnostics
• Backlit LCD display for clear readings in dim environments
• Safety rated CAT IV 600V for use on primary supply circuits
• Powered by 6 AA batteries with auto power off and data hold

Technical details

• Test voltages: 250V, 500V, 1000V
• Insulation resistance range: 0.001 MΩ to 2000 MΩ (2 GΩ)
• Basic insulation resistance accuracy: ±(3% + 5 digits)
• AC voltage range: 0.1V to 600V
• DC voltage range: 0.1V to 600V
• Resistance range: 0.01 Ω to 20 kΩ
• Continuity test: Yes, with audible buzzer (<35Ω)
• Polarization Index (PI): Yes
• Dielectric Absorption Ratio (DAR): Yes
• Display type: Backlit LCD
• Safety rating: CAT IV 600V
• Power source: 6 x 1.5V AA batteries
• Auto power off: Yes
• Data hold: Yes
• Min/Max function: Yes
• Enclosure type: Double molded housing
• Operating temperature: 0 to 40°C (32 to 104°F)
• Included accessories: Test leads, alligator clips, carrying case, batteries

Our verdict

The Extech MG310 is a versatile and reliable insulation tester suitable for both preventive maintenance and troubleshooting. Its multiple test voltages, PI/DAR capability, and rugged design make it a valuable tool for electricians and technicians.