The DLRO10HD features an internal rechargeable battery and can also operate from a mains supply, even if the battery is completely flat.
Like all models in the DLRO10 range, the DLRO10HD, when used with optional terminal insulating test leads, is rated CATIII, 300 V in line with IEC61010.
This versatile new test set is built into a tough but easy to carry case that provides an IP65 ingress protection rating when closed and an IP54 rating when the instrument is in use and operating from battery power.
Key features of the DLRO10HD Low Resistance Ohmmeter include:
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, great for charging inductance
High input protection to 600 V, inadvertent connection to line or UPS voltage will not blow a fuse
Heavy duty case: IP 65 lid closed, IP54 operational (battery operation only)
Rotary switch selects one of five test modes, including auto start on connection, giving ease of use
Easy to use with gloved hand
The instrument’s rotary switch controls are convenient to operate even with gloved hands, and it incorporates a large backlit liquid crystal display that can be easily read from a considerable distance.
With 0.1 µΩ resolution, 0.2% basic accuracy, and a dedicated mode for use with inductive loads, the DLRO10HD is ideal for applications as diverse as checking the integrity of welded joints and verifying winding resistance in large motors and transformers.
To provide maximum versatility, this innovative test set not only features high compliance but also offers user selectable high or low power ranges. The high power < 25 W ranges (measuring up to 250 mΩ at 10 A, or 2.5 Ω at 1 A) are ideal for heating a weakness or charging inductive loads. The low power ranges are power limited to 250 mW for applications where it is desirable to avoid heating the item under test.
Choice of test modes
The instrument offers a choice of five test modes. In normal mode, the test is initiated by pressing the “test” button. The instrument verifies continuity of all four connections, and then applies the test current in both forward and reverse directions before displaying the result. In automatic mode, the test starts as soon as the probes make contact with the item under test.
Automatic unidirectional mode is the same as automatic mode, but the test current is applied in one direction only. This reduces the testing time, but thermal EMFs from contact between dissimilar metals may reduce the accuracy of the results.
Continuous mode makes repeated measurements at three second intervals on the same sample. Inductive mode is, as the name suggests, optimised for tests on motors, transformers and other inductive loads, supplying a full 10 Amps for 60 up to seconds.
The DLRO10HD heavy duty low resistance ohmmeter from Megger is supplied as standard, with a set of test leads fitted with high quality duplex hand spikes featuring lights to remotely indicate when a test is complete or inadvertent connection to live supply. Test leads with Kelvin clips are also available as an option.
Megger offers a wide range of test and measurement instruments for use in the building wiring, electrical power and communications industries. Established originally in the late 1800’s the company has been manufacturing test and measurement instruments designed to perform preventive maintenance and troubleshooting for decades.
Our products provide testing solutions in the most critical maintenance areas including cable fault location, protective relay testing, and power quality testing, as well as being the supplier of choice for hand-held electrical test and measurement instruments for electrical installation, data and telecom engineers.
Over the years Megger has acquired several other major electrical test and measurement manufacturing companies both in the USA and UK. These companies now operate under the Megger name and include the well known brand names of Multiamp, Biddle, Foster, AVO and Metrosonics.
Megger’s commitment to the industry is reflected in its technical leadership and in being the first to design and introduce many key products to the marketplace. These include the first portable insulation tester, commercial cable fault locator, DSP based watthour meter test system, and software-driven protective relay test set.
Megger manufacturing plants are certified to the full operational requirements of ISO9001 and the manufacturing process strictly adheres to the highest standards for quality, reliability and safety.