Megger DLRO10HDX Data sheet

DLRO test leads ﬁtted with duplex Connectors

DLRO test leads

 Carry one lead set and swap terminations

 Simple push and twist for a quick change

 Lockable twist cap secures the leads

 Four terminal 10 A test lead system

 Warning / Indicator lights for DLRO10 range

 Extension leads available

DLRO test leads

DESCRIPTION

Duplex connect test lead system for use with any Megger 10 A DLRO and BT51 instruments

The Megger DLRO duplex connect four terminal test lead system is designed to provide the most cost effective and convenient way to provide the user with all of the test lead terminations and lead lengths required for the many different applications encountered in low resistance testing.

At the centre of this unique test lead system is a bespoke connector allowing terminations such as kelvin clips or duplex test probes to be changed as required. There are two connector versions, one being ﬁtted with indicator LEDs that operate with the DLRO10 range of instruments. The indicator LEDs provide enhanced safety and convenience with indications as follows:

DLRO10, DLRO10X, DLRO10HD and DLRO10HDX

 Warning of connection to hazardous live voltage

(Not DLRO10X, warning is given on the display)

 When continuity is made

 When a test complete and measurement is on instrument display

 DLRO10X adds

 Indication of pass / fail to user set test limits

All of these important indications are therefore seen near the point of connection without needing to view the instrument display. There is even a 6 m extension lead to provide the ultimate in ﬂexibility.

SAFETY WARNINGS

These safety warnings must be read and understood before the instrument is used.

Always refer to the user manual of the instrument being used with these test leads.

Do not touch the universal connector during test or while connected to hazardous voltages.

Whenever possible, circuits should be de-energised before testing.

If it is impossible to de-energise the circuit, (e.g. high voltage batteries cannot be switched off while their connections are tested) the user must be aware of the dangers. The instrument terminals will become live when connected to the circuit. Therefore when used on hazardous voltages the Megger terminal cover (available separately) must be used. See the accessories section of this user guide.

When running any test, or when attached to a test load, do not undo the modular connections. Isolate both test leads before changing any part of the modular leadset.

These test leads on their own not safety CAT rated due to the bare hook terminations. However when ﬁtted with insulating instrument terminal covers and a suitably rated test termination the overall safety CAT rating will be the lowest of the ratings between the instrument, the terminal covers and the test termination.

DLRO test leads ﬁtted with duplex Connectors

DLRO test leads

For example if used with a DLRO10HD ﬁtted with terminal cover part number 1002-390 and a pair of DP1-C duplex probes the safety rating of the complete system will be CAT III 300 V. However if the test terminations were changed to KC1-C Kelvin clips the safety rating would drop to <30 V as the KC1-C are un-rated.

Testing inductive circuits can be hazardous:

 After testing an inductive load there will be an amount of energy

stored in the inductance. This energy is released in the form of a discharge current. Disconnecting an inductive load while current is still ﬂowing will cause a high voltage arc, which is a danger to both the user and the item under test

 The DLRO connector lit lead sets are ﬁtted with a ‘test in progress

lamp’ associated with the TEST button which indicates that current is ﬂowing in the C1-C2 loop. For testing large inductive resistances the current carrying leads should be connected securely to the item under test before starting the test

 It is not recommended that duplex handspikes be used to carry

out tests on inductive loads. If inadvertently using the handspikes on an inductive load, the L1 lamp on the handspikes will ﬂash amber while discharge current ﬂows, thereby duplicating the function of the ‘I’ lamp on the instrument. It is important to maintain contact until the L1 light stops ﬂashing amber and turns green indicating the end of the test

APPLICATION

DUPLEX CONNECT SYSTEM – COMPONENT PARTS

CONNECT TEST LEADS WITH INDICATOR LIGHTS

These duplex test leads are single test leads supplied without terminations.

Test Lead (1 supplied) Order part number:

TL1.5-CL 1.5 m connect lit 1006-456

TL3-CL 3 m connect lit 1006-458

TL6-CL 6 m connect lit 1006-459

This product is not intrinsically safe. Do not use in an explosive atmosphere.

Do not operate the test leads or connect to any external system if any visible signs of damage are apparent or if they have been stored for prolonged periods in unfavourable conditions.

Inspection

Before each use of the test leads, perform a thorough visual inspection to conﬁrm that their condition is good, with no damaged or broken insulation.

The Measurement Category rating of the measurement system is that of the lowest rated component. If any part of the measurement leads is unrated, the instrument is safe for connection only up to 30 V.

Lead resistances - C hook termination to connector

1.5m lead (1 off) 20 m ohm

3m leads (1 off) 30 m ohm

6m leads (1 off) 40 m ohm

Description

These duplex test leads are ﬁtted with hook terminations for connecting to an instrument and a connector plug equipped with ultra-bright LED indicator lights viewable from any direction.

Test connection terminations are supplied separately.

The duplex connector incorporates a locking ring to prevent test connections being pulled off in use.

Indicator lights operate with DLRO10, DLRO10X and DLRO10HD via third connection plug. The function of these indicator lights are listed at the beginning of this document in the introduction.

These leads are designed to ﬁt:

 DLRO10

 DLRO10X

 DLRO10HD

 DLRO10HDX

DLRO test leads ﬁtted with duplex Connectors

DLRO test leads

CONNECT TEST LEADS WITHOUT INDICATOR LIGHTS

These duplex test leads are single test leads supplied without terminations.

Test Lead (1 supplied) Order part number:

TL1.5-C 1.5 m connect 1006-452

TL3-C 3 m connect 1006-454

TL6-C 6 m connect 1006-455

Lead resistances - C hook termination to connector

1.5m lead (1 off) 20m ohm

3m leads (1 off) 30m ohm

6m leads (1 off) 40m ohm

Description

These duplex test leads are ﬁtted with hook terminations for connecting to an instrument and a Connex plug.

Test connection terminations are supplied separately.

The duplex connector incorporates a locking ring to prevent test connections being pulled off in use.

These leads are designed to ﬁt:

 DLRO10

 DLRO10X

 DLRO10HD

 DLRO10HDX

There are separate versions available to ﬁt the BT51 as follows:

Test Lead (1 supplied) Order part number:

TL3-C-BT51 3m connect for BT51 1007-023

TL6-C-BT51 6m connect for BT51 1007-024

CONNECT EXTENSION LEAD

EL6-C Extension Lead

6 m connect (1 supplied) 1006-460

Lead resistance 40 m ohm

Description

This 6 m long duplex connect extension lead is designed to extend the duplex connect test leads that are without indicator lights.

More than one extension lead can be used to create even longer test lead lengths. However the overall lead resistance must be taken into account. The higher the overall loop resistance, including the test piece, the lower the maximum test current available will be.

Any 10 A DLRO instrument ﬁtted with a pair of 3 m test leads and any test lead terminations (duplex probes or kelvin clips) can have up to 2 x 6 m extension leads used and still be able to supply 10 A test current. This is because the overall resistance of this combination is below the 100 m ohm lead resistance maximum speciﬁed.

These extension leads are designed to ﬁt any of these test leads:

 TL1.5-C

 TL3-C

 TL3-C-BT51

 TL6-C

 TL6-C-BT51

Note: These extension leads will not ﬁt any of the leads ﬁtted with indicator lights

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