Megger DLRO10HD NLS – Digital Low Resistance Ohmmeter, 10 Amp

Megger DLRO10HD NLS – Digital Low Resistance Ohmmeter, 10 Amp

Equally at home in the laboratory, the workshop or in the field, on the bench or on the ground, Megger’s new heavy duty DLRO10HD low resistance ohmmeter combines rugged construction with accuracy and ease of use. It features an internal rechargeable battery and can also operate from a mains supply, even if the battery is completely flat.

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.

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.

• Maximum current rating: 20 A
• Connector to clip resistance: 10m ohm
• Clip capacity: 52 mm to 7 5mm with sliding jaw
• Will fit: Any duplex connect test lead and extension lead
• Safety: CAT IV 600 V

The actual safety CAT rating in use will always be the rating of the lowest part of the complete system For example if used with a DLRO10 without terminal covers the system will be unrated and must not be connected to live voltages above 30 V.

In this example using a DLRO10HD a terminal cover should also be.

Additional Features and Benefits

• Rugged case well suited to transportation with shoulder strap and lead set pouch
• Removable lid facilitates easy test lead connection
• Operational ingress protection is IP 54 (battery power only) ensuring protection from the elements
• 7Ah lead acid battery provides extended operation and can be charged whilst operating from line power
• Rotary mode switch with bidirectional (current reversal with averaging cancels thermal EMFs), unidirectional, automatic, continuous and inductive modes
• Large, clear LCD display with backlight and contrast adjustment
• Auto power off function conserves battery