Megger DLRO10HDX Micro-ohmmeter
Starting at $4,700.00

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  • ±0.2% (±0.2µΩ) accuracy
  • Protected to 600V without blowing a fuse
  • Results auto-save to on-board memory
    • Up to 200 records
    • Download to PowerDB via USB for record keeping
  • Case is IP65 with lid closed & IP54 when open
  • Available with hand spikes or Kelvin clips
  • Interchangeable test lead terminations for flexibility

The Megger DLRO10HDX micro-ohmmeter measures low resistance values in applications ranging from railways and aircraft to resistance of components in industry. It provides five test modes: bidirectional (current reversal with averaging cancels thermal EMFs), unidirectional, automatic, continuous and inductive. Each test mode is selected by a simple rotary dial on the Mode selection rotary switch. All memory functions, the ability to delete, download to PowerDB, and test results recall are also accessible via the Range Selection rotary switch.

The DLRO10HDX is well suited to measuring thick conductors, bonds, and quality of welding because of its 10Amp range for resistance values up to 250mΩ. It can measure any metallic joint, but users must be aware of measurement limitations depending on the application. For example, if a cable manufacturer plans to make resistive measurements on a thin wire, a low test current should be selected to prevent heating the wire and thereby changing its resistance.

These units are powered from either rechargeable battery or mains power making it suitable for continuous testing in production line or repetitive use environments.

Megger Calibration Shunts
Field testing shunt for use with BITE2/2P, BITE3, and DLRO 10/10X/10HD/10HDX
Megger DH5 Duplex Hand Spikes
Two straight duplex handspikes with spring loaded tips and 8ft (2.5m) cables
Megger 242011 Test Lead Set
Helical spring point leads, Spacing between P and C 0.4in, Max test current 10A
Megger 242002 Test Lead Set
Spacing between P and C probe tips 0.35in, Max test current 10A
Megger 242004 Test Lead Set
Clamp capacity 2in, Max test current 10Aanvil insulated from the clamp
Megger Replaceable Needle Points
Max test current, 7ft in length
Megger 241005 / 242005 Test Lead Set
Kelvin clips 0.5in (1.3cm), gold plate or silver plate options, 7ft of cable
Megger 242006 Test Lead Set
Kelvin clips 1.5in (4cm), Max test current 10A
Megger 242021 Test Lead Set
Potential test lead hand spikes
Megger 242041 Test Lead Set
Current test lead terminal clips, Max test current 10A
FLIR DM90 / DM91 TRMS Multimeter
Digital multimeter with type K temperature probe, on-contact AC voltage detector as well as VFD & uA current measurement capabilities
Megger DLRO Interchangeable Connector Lead Set
Test lead system with the option for interchangeable terminations to allow ends to be changed instead of switching entire lead set
Megger Duplex Probes With Interchangeable Terminations
Single probe for use with Megger DLRO & BT51 interchangeable connector lead set
Megger Interchangeable Duplex Test Leads
Single lead for use with Megger DLRO & BT51 interchangeable connector lead set
Megger KC Series Test Leads
Wind turbine lightning protection test lead set rated to 10A with metal framed cable reel
Megger DH1-C Duplex Handspike
DH1-C 3m Connect Duplex Handspike (x2) Complete Duplex Lead Set
Megger 1009-744 Transit Case
Polypropylene, double wall construction for strength and stability with continous center hinge and knee-lever catches

Application Notes

Here's how some of our customers used this product.

Protecting Wind Towers from Lightning

The Background: Our customer is an independent power producer that maintains a number of small windfarms and seeks a reliable means of testing that each windmill is protected from lightning strikes.

The Problem: Due to their size and the materials from which they’re made, windmills are highly susceptible to lightning strikes. Lightning is, in fact, the leading cause of downtime and catastrophic damage can occur if there’s not a good path from blade tips to the ground.

Due to the large distance between blade tips and ground as well as potential damage to conductors from blade flex, there isn’t an easy way to make sure that lightning travels through the lightning protection system rather than into the sensitive electronics.

Necessary periodic testing of the lightning protection system requires extra-long, high integrity test leads, but even the best leads with such length have such high resistance that they need to be used in conjunction with a high wattage, low-resistance ohmmeter.

The Solution: We recommended the Megger DLRO10HDX micro-ohmmeter which provides 25W of power which can supply the required 1A test current over the large distances required by this application and which can test in accordance with IEC61400-24 standards for low-resistance ohmmeters.

The DLRO10HDX was paired with Megger KC series leads which have been developed with turbine manufactures to create a Megger system solution. The leads are designed to test from blade tip to root of a grounding system and are fitted to a reel for ease of use.

Earth test connections to ground should also be completed to make sure complete system resistance is within appropriate guidelines.