■ NEW interchangeable test lead terminations
■ High or low output power selection for
condition diagnosis
■ Rechargeable battery or line power supply,
continuous operation, even with dead
battery
■ 10 A for 60 seconds, less time waiting to
cool
■ Protected to 600 V without blowing a fuse,
test lead live voltage warning light
■ Heavy duty case: IP 65 lid closed, IP54
battery operation
■ Simple rotary switch selection of five test
modes, including auto start on connection
DLRO10HD
10 A Digital Low Resistance Ohmmeter
DLRO10HD
10 Amp Digital Low Resistance
DESCRIPTION
Augmenting Megger’s DLRO10 and 10X range the DLRO10HD
combines ultimate simplicity of operation with a rugged IP65
case designed for stable ground and bench operation.
The unit is powered from either its rechargeable battery or line
power making it suitable for continuous testing in production
line/repetitive use environments.
Rotary switch controls are simple and easy to operate in all
weather conditions and with gloved hands. A large, clear,
backlit LCD display is easy to read from a distance. The
DLRO10HD provides significantly enhanced compliance and
is capable of delivering 10 A into measurements up to 250
mΩ and 1 A into measurements up to 2.5 Ω. The duration of
each test may be up to 60 seconds.
The DLRO10HD is rated CATIII 300 V provided the optional
terminal cover is fitted to the instrument. Details of which can
be found in the ordering information panel of this data sheet.
The DLRO10HD provides five test modes each of which is
selected through a simple rotary control.
History of ‘Ducter’ testing
For over 100 years the ‘Ducter test’ has been used to describe
a simple test for measuring very low contact resistances
and “Ducter”, which is still used as a trade mark, was the
name originally given to the low resistance ohmmeter
manufactured by Megger. The name Ducter was registered
by Megger in June 1908 and ‘Ducter’ has since become the
industry standard.
ADDITONAL FEATURES AND BENEFITS
n Rugged case well suited to transportation with shoulder
strap and lead set pouch
n Removable lid facilitates easy test lead connection
n Operational ingress protection is IP 54 (battery power
only) ensuring protection from the elements
n 7Ah lead acid battery provides extended operation and
can be charged whilst operating from line power
n Rotary mode switch with bidirectional (current reversal
with averaging cancels thermal EMFs), unidirectional,
automatic, continuous and inductive modes
n Large, clear LCD display with backlight and contrast
adjustment
n Auto power off function conserves battery
APPLICATIONS
The DLRO10HD measures low resistance values in applications
ranging from railways and aircraft to resistance of components
in industry.
Any metallic joint can be measured but users must be aware
of measurement limitations depending on 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 thereby changing its
resistance
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