Megger DLRO10HD 10 A Digital Low Resistance Ohmmeter | 0.1 μΩ resolution, 5 measurement modes, 600 V accidental connection without blowing fuses, IP65 (lid closed)

Megger DLRO10HD 10 A Digital Low Resistance Ohmmeter: 0.1 μΩ Resolution

Overview

The DLRO10HD is Megger's heavy-duty 10 A digital low resistance ohmmeter (micro-ohmmeter) for low-resistance measurement of circuit breaker contacts, busbar joints, welds and rail bonds. A single measurement lasts up to 60 seconds, with high or low output power selectable. The DLRO10HDX adds 200-result memory and PowerDB download.

Key Specifications

• Measurement range: 100 μA: up to 2.5 kΩ; 1 mA: up to 25 Ω; 10 mA: up to 2.5 Ω; 100 mA: up to 250 mΩ; 1 A: up to 25 mΩ; 10 A: up to 2.5 mΩ (resolution 0.1 μΩ)
• High-power ranges: 1 A up to 2.5 Ω (2.5 W); 10 A up to 250 mΩ (25 W)
• Basic accuracy: ±0.2% of reading (forward/reverse average), ±0.2 μΩ on the 10 A range
• Measurement modes: Bidirectional (forward/reverse average cancels thermal EMF), unidirectional, auto, continuous, inductive
• Protection: Accidental connection to 600 V does not blow fuses; warning lamp for live test leads; CAT III 300 V with the optional terminal cover fitted
• Power: 6 V 7 Ah sealed lead-acid battery or 100–240 V mains; 8-hour charge
• Dimensions, weight and protection: 315 × 285 × 181 mm, 6.7 kg; IP65 (lid closed), IP54 (battery operation)

Applications

• Contact resistance measurement of circuit breaker contacts, busbar joints and welds.

Specifications per the Megger product page and DLRO10HD/DLRO10HDX datasheet (retrieved 2026-10-21).