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Megger DLRO2 Handheld Low Resistance Ohmmeter
The Megger DLRO2 Handheld Low Resistance Ohmmeter is a rugged (IP54), electrically safe (CAT III 600V/ CAT IV 300V) and compact 2A low-resistance meter. It will provide quick, precise and reliable measurements in electrically noisy environments making it suitable for use industrial, railway and aviation sectors. Please see the video below for a quick introduction to the Megger DLRO2 Handheld Low Resistance Ohmmeter.
Introducing the DLRO2
The Megger DLRO2 Handheld Low Resistance Ohmmeter’s rechargeable HR6 NiMH batteries, along with its separate Inductive Load function, ensure that it can provide a 2A test current for approximately 15 seconds. This enables testing of smaller inductive loads. Fully charged, the Megger DLRO2 Handheld Low Resistance Ohmmeter can conduct five-hundred three-second 2A tests.
In addition to this, the Megger DLRO2 Handheld Low Resistance Ohmmeter can safely test the resistance of inductive loads at 1A. It features a Fast/Long Test Lead mode which enables efficient testing at 1A into 4Ω. This function is ideal for testing subsea cables, and wind turbine and avionic lightning protection. It supports manual and automatic starts and will display measurements in mΩ, making it ideal for non-technical or inexperienced users.
The Megger DLRO2 Handheld Low Resistance Ohmmeter also features Normal Resistance and Inductive Resistance modes:
- Normal Resistance mode: the maximum test current can be set at 2A; the Megger DLRO2 Handheld Low Resistance Ohmmeter will auto-range to accommodate the measured resistance up to this value. This mode offers the greatest flexibility, provides full control over the ohmmeter’s test features, and is ideal when the component-under-test has a limit to the current it can withstand.
- Inductive Resistance Mode: ideal for continuity detection below 200Ω, and testing small to medium electric motors and small power distribution transformers, this mode provides a test current of 1A to improve charge time; it will auto-range the test current as the inductance is charged. This mode supports Auto Stop and will halt the test as soon as a stable result is reached.
The Megger DLRO2 Handheld Low Resistance Ohmmeter can run tests in a Bidirectional or Unidirectional mode to improve efficiency and conserve the battery life. The Bidirectional test mode provides forward and reverse measurements which are viewable on the secondary display. Furthermore, this mode reduces the effects of standing EMF voltage.
The Megger DLRO2 Handheld Low Resistance Ohmmeter provides an accuracy of 1%. Moreover, to ensure result stability and repeatability, the Megger DLRO2 will issue a warning when electrical noise or noise caused by poor clip/probe connections is present.
The user can view up to three results via the Megger DLRO2 Handheld Low Resistance Ohmmeter’s display making this instrument ideal for testing three-phase systems. Additionally, it includes a NEW Difference Meter which compares readings to an initial reference measurement. The Difference Meter converts percentage differences into an easily interpretable needle/pointer movement. Please see the video below for further information.
DLRO2 hand-held 2 A Low Resistance Ohmmeter
Finally, to prevent inadvertent downtime, the Megger DLRO2 Handheld Low Resistance Ohmmeter will protect itself, without blowing a fuse, against accidental connection to lines of up to 600V.
The Megger DLRO2 Handheld Low Resistance Ohmmeter is an accurate, reliable and durable low resistance meter suitable for use in a variety of industries.
Applications
| Industry | Potential Applications/ Tests |
| Aviation | Lightning protection testing measuring mΩ resistance between receptors, wing tip to wing tip etc., using long test leads. Optional long cable reel test leads are available, can be used for assembly of components, the interconnection of equipment, repair and maintenance. |
| Wind turbines | Lightning protection, measuring mΩ resistance between wing tip to ground connection at the base using long test leads. Optional long cable reel test leads are available. |
| Rail, tram and underground | Rolling stock and infrastructure, track high current joints, signalling systems. |
| Marine | Power wiring systems, protection systems, ship-to-shore bonding, cathode protection system testing and cable laying applications. |
| Oil and gas pipelines | Bonding between welded joints and grounding systems. |
| Automotive and EV | Battery connections, weld quality, crimped connections quality, assembly robot welding cables. |
| Cable manufacturers | Quality control, cable length. |
| Component manufacturers | Quality control. |
| Space exploration and engineering | Structural metal to metal, ground network metal to metal, carbon fibre to metal, carbon fibre to carbon fibre. |
| Data centres | During the electrical installation of the main panel, generator and UPS systems. Verification of protective device contact resistance, busbar parallel feeds, busbar lapped joints, optimum resistance over torque, and cable lug to busbar connections. During maintenance using trending data for all aspects of the above, verification after repair. |
| Medical hand-held opportunity | Earthing and bonding systems for protection against microshock and macroshock. |
| Panel/switchgear manufacturers | End of production line testing, site commissioning, maintenance and fault finding. |
| Robotics | Wiring systems and connections which are subject to stress/movement/vibration, bonding of component parts to minimise static, grounding of machine, welding leads of robot spot welder. |
| Electrical infrastructure | Cable resistance from one end, cable length, identification of parallel supplies while connected, cable to lug to connection fault finding. Checking assembled connections main supply cables and panels, switchgear and protective devices, UPS and changeover panels, interlinking busbars, interlinking cables, distribution and PDU boards, lightning protection systems, final circuits. |
Megger DLRO2 Handheld Low Resistance Ohmmeter Key Features
- Rugged, electrically safe and compact 2A low-resistance meter
- Provides quick, precise and reliable measurements in electrically noisy environments
- Suitable for use in industrial, railway and aviation sectors
- IP54
- NOT ATEX/ intrinsically safe
- CAT III 600V/ CAT IV 300V
- <600V active protection against accidental line connections without blowing a fuse
- Supplied with compact CAT III/ CAT IV 300V-rated kelvin clip test leads
- Rechargeable HR6 NiMH batteries
- Recharge batteries in 2.5 hours
- Rechargeable batteries can be swapped for non-rechargeable AA alkaline batteries
- Quick recharge time and compatibility with AA batteries maximises uptime
- Rotary dial: easily select functions
- Separate Inductive Load function
- Can provide a 2A test current for approximately 15 seconds
- Can test smaller inductive loads
- Can conduct 500x 2A tests lasting 3 seconds each (when fully charged)
- Safely test the resistance of inductive loads at 1A
- Fast/Long Test Lead mode: enables efficient testing at 1A into 4Ω
- Normal Resistance mode
- Inductive Resistance mode
- Run tests in Bidirectional or Unidirectional mode
- Bidirectional mode reduces the effects of standing EMF voltage
- Bidirectional mode: forward and reverse measurements can be viewed on the secondary display
- Accuracy: 1%
- Result stability: issues a warning when electrical noise or noise caused by poor clip/ probe connections is present
- View up to three readings on the display
- Ideal for testing three-phase systems
- NEW Difference Meter: converts % difference into a needle/ pointer movement allowing users to compare readings to an initial reference measurement quickly and easily
- Set new reference measurements at the push of a button
- An accurate, reliable and durable low resistance meter
What’s Included?
- Megger DLRO2 Handheld Low Resistance Ohmmeter
- 2m Kelvin Clip Test Lead Set (CAT IV 300 10A)
- 2m Kelvin Probe Test Lead Set (CAT IV 300 10A)
- 240V Charger Power Supply
- 6x 1.2V NiMH AA 2000mAHR Batteries
- USB Memory Stick (with User Guide)
- Hanging Hook and Strap
- Soft Pouch
Megger DLRO2 Handheld Low Resistance Ohmmeter Technical Specifications
| Physical | |
| Dimensions | 228 x 105 x 75 mm (8.98 x 4.1 x 2.95 in) |
| Display | Full LCD colour screen with user-configurable backlight. |
| Weight | 905 grams |
| Safety and Electrical Protection | |
| Safety rating | CATIII 600 V / CATIV 300 V to EN 61010, IEC 61010-031 : 2015, IEC 61010-030. |
| Safety category rating valid to an altitude of 3000 m | |
| Live voltage | Active live voltage protection to 600 V between any test terminals without blowing a fuse. Live voltage warning on display and audible when >5 V is applied between any test terminals. Fuse protected to 1000 V, fuses are not user-changeable. |
| Test Current Output (Normal Resistance test mode) | |
| Current ranges | 2 A, 1 A, 100 mA, 10 mA and 1 mA |
| Maximum compliance output voltage | 3.24 V (1 A mode) 2.2 V (2 A mode) |
| Current output accuracy | Normal and inductive mode: ±10 % Long lead test mode: +10 % -0% at all battery conditions except with low battery indication. |
| Thermal EMF/Seebeck effect compensation | Yes, average of forward and reverse test current measurements. |
| Low Resistance Measurement | |
| Resistance measurement test modes | Normal test mode, fast mΩ/long test lead mode and inductive test mode (resistance of inductive loads). |
| Overall resistance range | 1 µΩ – 2000 Ω |
| Max resistance across C terminals | 2 A with up to 1.1 Ω total resistance and 1 A with up to 3.2 Ω total resistance. |
| Basic accuracy | Bi-directional test current mode: +/- 1% +/- 2 digits. Uni-directional test current mode: +/- 1% +/- 10 digits. Inductive mode or unidirectional mode will introduce an undefined error if an external EMF is present |
| Environment | |
| Noise immunity | Less than 1% ±20 digits additional error with 80 mV peak 50/60 Hz with on-screen noise limit indicator. |
| Less than 1% ±20 digits additional error with 80 mV peak 400 Hz with on-screen noise limit indicator. | |
| EMC | IEC61326-1, industrial specification IEC61326-2-2. |
| Dust and moisture ingress | IP54 to IEC60529 in use |
| Altitude | Operational to 3000m |
| Temperature | Operational range 0 ºC to 50 ºC |
| Storage range -20 ºC to 50 ºC | |
| Humidity | Operational to 95 % |
| Storage to 90 % | |
| Power Supply | |
| Power Supply | Rechargeable 6 x HR6 NiMH batteries with built-in fast charge (also has the ability to use non-rechargeable alkaline AA batteries (LR6)) |
| Battery charge time | < 4 hours |
| Battery life | >1000 bi-directional tests at 2 A auto into a 1 Ω load |
| Battery Charger Adapter | |
| Mains/line input voltage | 100 to 240 V |
| Mains/line input frequency | 47 to 63 Hz |
| Output | 12 V DC 1.2 A 14.4 W max |
| Type | Travel adaptor/interchangeable plug adaptor |
| Plug types | Australia, USA, Europe and UK plugs |
| Connections | |
| Test terminals | 4 X 4 mm shrouded sockets |
| Data | USB (For firmware updates only), the user may update instrument firmware to latest version themselves |
| Battery charger | 2.5 mm DC jack connector |
Resistance Measurement Ranges
| Full-Scale Resistance | Test Current | Resolution | Normal Resistance Mode |
Inductive Mode | Long Test Lead Mode (1 A only) |
| 15000 µΩ | 2.00 A | 1 μΩ | Yes | ||
| 120.00 mΩ | 2.00 A | 0.01 mΩ | Yes | ||
| 1000.0 mΩ | 2.00 A | 0.1 mΩ | Yes | ||
| 30.000 mΩ | 1.00 A | 0.001 mΩ | Yes | Yes | Yes |
| 240.00 mΩ | 1.00 A | 0.01 mΩ | Yes | Yes | Yes |
| 2200.0 mΩ | 1.00 A | 0.1 mΩ | Yes | Yes | Yes |
| 300.00 mΩ | 100 mA | 0.01 mΩ | Yes | ||
| 2500.0 mΩ | 100 mA | 0.1 mΩ | Yes | ||
| 20.000 Ω | 100 mA | 0.001 Ω | Yes | Yes | |
| 3000.0 mΩ | 10.0 mA | 0.1 mΩ | Yes | ||
| 24.000 Ω | 10.0 mA | 0.001 Ω | Yes | ||
| 200.00 Ω | 10.0 mA | 0.01 Ω | Yes | Yes | |
| 30.000 Ω | 1.00 mA | 0.001 Ω | Yes | ||
| 240.00 Ω | 1.00 mA | 0.01 Ω | Yes | ||
| 2000.0 Ω | 1.00 mA | 0.1 Ω | Yes | Yes |
Reviews
Additional Information
| SKU | 1012-280 |
|---|---|
| Manufacturer Part Code | 1012-280 |
| Country of Origin | United Kingdom |
