Megger DLRO2 Low Resistance Ohmmeter User Guide

: June 9, 2024
: Megger

Table of Contents

Individual tests:
KC Test Leads
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

DLRO2 Low Resistance Ohmmeter User Guide
DLRO2 and DLRO2X
Ducter™ Low Resistance Ohmmeter 2 A
For User Guide
and other language versions please visit megger.com/support https://megger.com/dlro2x
https://megger.com/2a-low-resistance-ohmmeter-dlro2

DLRO2 and DLRO2X safety warnings
These safety warnings must be read and understood before the instrument is used. Retain for future reference.
Warning: This instrument must be operated only by suitably trained and competent people.
Protection provided by the instrument may be impaired if it is not used in a manner specified by the manufacturer.

Local Health and Safety Legislation requires users of this equipment and their employers to carry out valid risk assessments of all electrical work to identify potential sources of electrical danger and risk of electrical injury such as inadvertent short circuits. Where the assessments show that the risk is significant then the use of fused test leads may be appropriate.
If battery power is lost during the test, then the user will no longer be warned that the load is being discharged. The user must check by independent means that the load is discharged before breaking connection.
Disconnect all test leads and switch the instrument OFF before opening the battery. Covers must be in place before reconnecting the test leads.
Ensure every cell in the battery compartment is of identical type. Never mix rechargeable and nonchargeable cells.
This product is not intrinsically safe. Do not use it in an explosive atmosphere.
Protection provided by the instrument may be impaired if it is not used in a manner specified by the manufacturer.
The voltage warning function will operate only if the instrument is switched on and working correctly.
In the absence of an indication do not assume that there are no hazardous voltages
The voltage indicator and current discharge features must be regarded as additional safety features and MUST not substitute the normal safe working practice which MUST be followed.
The instrument must not be used if any part of it is damaged or if the terminal shutter is missing.
The circuit under test must be switched off, de-energized, securely isolated and proved dead before test connections are made.
Circuit connections, exposed conductive parts and other metalwork of an installation or equipment under test must not be touched during testing.
Only “Megger” approved test leads with right-angled instrument connectors must be used with this instrument. Test leads must be at least 1 m in length and provide a total loop impedance ≥ 26 mΩ.
When inductive loads are measured it is essential that the current carrying leads are securely clamped to the item being tested and that they are not removed before any stored charge has been discharged at the end of the test. Failure to comply with these instructions might result in an arc being producedwhich might be dangerous for the instrument and the operator.
All test leads, probes and crocodile clips must be in good order, clean, and with no broken or cracked insulation.
Verify the integrity of the test leads before use.
The safe maximum limit of a measurement connection is that of the lowest rated component in the measurement circuit formed by the instrument, test leads and any accessories.
Ensure that hands remain behind finger guards of probes and clips.

Safety symbols marked on the instrument

| Refer to user instructions
---|---
| Risk of electric shock
| Equipment protected throughout by Double Insulation
****| Equipment complies with current EU directives.
| Equipment complies with current UKCA directives
| N13117 Equipment complies with current “C tick” requirements
| Do not dispose of in the normal waste stream.

Installation category definitions:
CAT IV – Measurement category IV: Equipment connected between the origin of the low-voltage mains supply and the distribution panel.
CAT III – Measurement category III: Equipment connected between the distribution panel and the electrical outlets.
CAT II – Measurement category II: Equipment connected between the electrical outlets and the user’s equipment.
Measurement equipment may be safely connected to circuits at the marked rating or lower.
This instrument is manufactured in the UK. The company reserves the right to change the specification or design without prior notice. Megger is a registered trademark.

Test lead safety warning:
Test leads, including crocodile clips, must be in good condition, clean, dry, and free of broken or cracked insulation. The lead set or its components must not be used if any part of it is damaged.
The safe maximum limit of a measurement connection is that of the lowest rated component in the measurement circuit formed by the instrument, test leads and any accessories.

This Quick Start Guide provides basic information with some example tests only. Refer to the User Guide for full information.

Individual tests:

Wind turbine
lightning protection test leads

KC Test Leads

The KC-series of test leads provide a complete and convenient solution to the problem of finding reliable test leads that are long enough for testing the continuity of lightning protection conductors in wind turbines.
KC-series wind turbine test leads are available in 100 m, 60 m and 30 m (330 ft, 200 ft and 100 ft) versions that are equally suitable for use on site or in the manufacturing plant.
All lead set versions are 10 A rated and fully compatible with DLRO2 and DLRO2X.

https://megger.com/wind-turbine-lightning-protection-test-lead-sets-kc- series-test-leads
For more information use the QR code or visit
www.megger.com

Local Sales office
Megger Limited
Archcliffe Road Dover
Kent CT17 9EN UK
T. +44 (0)1 304 502101
F. +44 (0)1 304 207342

Megger Limited
Archcliffe Road
Dover
Kent CT17 9EN UK
T. +44 (0)1 304 502101
F. +44 (0)1 304 207342| Megger GmbH
Weststraße 59
52074 Aachen
T. +49 (0) 241 91380 500
E. info@megger.de
---|---
Megger Valley Forge
400 Opportunity Way
Phoenixville,
PA, 19460
USA
T. +1 610 676 8500
F. +1 610 676 8610| Megger USA – Dallas
4545 West Davis Street
Dallas TX 75237
USA
T. 800 723 2861 (USA only)
T. +1 214 333 3201
F. +1 214 331 7399
E. USsales@megger.com
Megger AB
Rinkebyvägen 19, Box 724,
SE-182 17
DANDERYD
T. +46 08 510 195 00
E. seinfo@megger.com| Megger USA – Fort Collins
4812 McMurry Avenue
Suite 100
Fort Collins CO 80525 USA
T. +1 970 282 1200

This instrument is manufactured in the United Kingdom.
The company reserves the right to change the specification or design without prior notice.
Megger is a registered trademark
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc and is used under licence.
For firmware license documents related to this product visit www.megger.com
Part No: DLRO2-DLRO2X–2013-925_QS-SW_en-de-fr-es-esla-pt-it-nl-cn_V02 04 2022

© Megger Limited 2022
www.megger.com