1. Introduction
This user guide details the operational and functional details of the
Megger
DLRO2 Ducter Low Resistance
Ohmmeter 2 A.
Please read this user guide fully before attempting to use the DLRO2.
1.1 Product Description
The DLRO2 is a tough and truly hand held 2 A low resistance ohmmeter, designed to provide fast, accurate and
repeatable measurements even in electrically noisy environments.
The DLRO2 is designed for ease of use, it can be operated by non-technical users with minimal training.
There are three main measurement modes:
Normal resistance (µΩ).
Fast / long test lead (mΩ).
Inductive resistance (µΩ).
The DLRO2 is supplied with six HR6 rechargeable NiMH cells which can be charged in the instrument using the
supplied external power supply. Non-rechargeable Alkaline AA cells can also be used.
For personal safety and to get the maximum benefit from this instrument, make sure that the safety warnings and
instructions are read and understood before the instrument is used.
Refer to 2. Safety warnings on page 5.
Note:
This user guide includes instructions for all DLOR2 variants. Some facilities may not be available on your
model of this equipment.
1.2 Features
New ‘Difference Meter’ for quick comparison of results.
Refer to 3.5 The Difference Meter on page 12.
Rotary dial test function selection.
Unidirectional or bidirectional test options on normal resistance test mode.
Secondary display field showing either forward and reverse measurement results or previous two test results,
allowing three test results to be on display at any time for easy comparison.
Current reversal capability to cancel standing EMF.
Noisy connection warning, showing when electrical noise or noise from poor clip / probe connections is present.
Test currents selectable from 1 mA to 2 A
Capable of 500 measurements from a single charge.
Supplied with compact CATIII 600 V / CATIV 300 V rated kelvin clip test leads.
1.2.1 Difference Meter
The Difference Meter allows repetitive measurements to be easily compared with an initial reference measurement.
The Difference Meter translates percentage difference to a needle / pointer movement making it easy to see changes
in value.
A new reference measurement can be set at any time at the push of a button.
Refer to 3.5 The Difference Meter on page 12 for further information.
Introduction
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DLRO2
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