Digital ohmmeter DLRO2

portablelow-resistance

Overview
The Megger DLRO2 is a portable 2 A low resistance ohmmeter designed for fast, accurate and repeatable measurements in electrically noisy and outdoor environments. Part of the Ducter™ series, it combines active protection and long‑lead testing capability for industrial, rail and aerospace applications.

About the product

• Difference Meter for quick comparative measurements and percentage-difference indication
• Long‑lead test mode providing up to 1 A into 4 Ω for use with extended test leads and optional cable‑reel leads
• Safe testing of inductive loads at 1 A
• Active protection <600 V against inadvertent live connections without blowing a fuse
• Portable battery powered instrument with IP54 protection for outdoor use
• Safety ratings: CAT III 600 V / CAT IV 300 V
• Bluetooth and USB data export; compatible with CertSuite Asset software

Key features and functionality

• Noise Rejection Mode and Confidence Meter™ to ensure reliable readings in electrically noisy environments
• Difference Meter with needle/pointer percentage-difference display for quick comparisons
• Dedicated long-lead optimisation mode for testing with long cables (suitable for wind‑turbine and avionic lightning-protection tests)
• Battery operation for portability and field use
• Firmware updates via USB (automatic update on startup when update present on USB pen drive)

Usage and applications
The DLRO2 supports low-resistance testing across applications such as railways, aircraft, wind‑turbine lightning protection and general industrial maintenance where reliable low-resistance and inductive-load measurements are required.

Technical specifications

• Data storage and communication: Bluetooth, USB export (no internal data storage)
• Max output current (DC): 2 A
• Dedicated long-lead test current: up to 1 A into 4 Ω
• Power source: Battery
• Active protection: <600 V against inadvertent live connections
• Protection rating: IP54
• Safety ratings: CAT III 600 V / CAT IV 300 V (IEC 61010)