10A Micro Ohmmeter / 10A Ductor | MEGGER DLRO10HD 10 Amp Digital Low Resistance Ohmmeter

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The Megger 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 1A into measurements up to 2.5 Ω. The duration of each test may be up to 60 seconds.

The DLRO10HD is rated CAT III 300 V. A range of test leads is available to suit the application.

The DLRO10HD provides five test modes each of which is selected through a simple rotary control.

PDF Download icon Megger DLRO Connector Test Leads Datasheet

PDF Download icon Megger DLRO10HD Datasheet

SKU: MEGGER DLRO10HD Category: Tag:

The Megger DLRO10HD 10A Micro Ohmmeter combines ultimate simplicity of operation with a rugged IP65 case and is 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 10A Ductor 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 10A Micro Ohmmeter is rated CAT III 300 V. A range of test leads is available to suit the application.

The 10A Ductor provides five test modes each of which is selected through a simple rotary control: Rotary mode switch with bidirectional (current reversal with averaging cancels thermal EMFs), unidirectional, automatic, continuous and inductive modes.

Automatic unidirectional mode applies current in one direction only to speed up the measurement process. However thermal EMF resulting from dissimilar metal bonds can cause lower accuracy. Test starts automatically when probes are connected.

Continuous mode allows repeated measurements to be made on the same sample. Simply connect the test leads and press the test button. The measurement is updated every three seconds until the circuit is broken.

Inductive mode is selected when measuring resistance on, for example, motors and generators. When measuring inductive loads it is necessary to wait for the voltage to stabilize as the inductive element is charged. Test leads are firmly connected to the device under test and the ‘Test’ button pressed. The instrument will pass the selected current through the sample continuously in one direction only and take repetitive readings that will gradually decrease to the true value as the voltage stabilizes. The operator decides when the result is stable and presses the ‘Test’ button to terminate the test.

The DLRO10HD includes the following accessories:

  • DH4 duplex handspike 1.2m
  • Test lead pouch (lid mounted)
  • DLRO10HD user guide CD
  • Warranty book

Specifications

Electrical Specifications
Resistance/Current Ranges

The green resistance ranges on the keypad indicate low output power (<0.25 W) outputs. Red ranges indicate higher 2.5 W (1 A) and 25 W (10 A) power outputs.

Resolution and Accuracy

Test current accuracy ±10%
Voltmeter input impedance >200 kΩ

Test Current Resistance Range Resolution Accuracy* Full Scale Voltage Max Power Output
0.1 mA 0 to 2500.0 Ω 100 mΩ ±0.2%
±200 mΩ		 25 mV 2.5 µW
0.1 mA 0 to 250.00 Ω 10 mΩ ±0.2%
±20 mΩ		 25 mV 2.5 µW
1 mA 0 to 25.000 Ω 1 mΩ ±0.2%
±2 mΩ		 25 mV 25 µW
10 mA 0 to 2500.0 Ω 100 mΩ ±0.2%
±200 mΩ		 25 mV 250 µW
100 mA 0 to 250.00 Ω 10 mΩ ±0.2%
±20 mΩ		 25 mV 2.5 µW
1 A 0 to 25.000 Ω 1 mΩ ±0.2%
±2 mΩ		 25 mV 25 µW
10 A 0 to 2500.0 Ω 0.1 mΩ ±0.2%
±0.2 mΩ		 25 mV 0.25 µW
1 A 0 to 2500.0 Ω 100 mΩ ±0.2%
±200 mΩ		 2.5 mV 2.5 µW
10 A 0 to 250.00 Ω 10 mΩ ±0.2%
±20 mΩ		 2.5 mV 25 µW

* The accuracy stated assumes forward and reverse measurements. Inductive mode or undirectional mode will introduce an undefined error if an external EMF is present.
General Specifications
Temperature Coefficient < 0.01% per ºC, from 5 ºC to 40 ºC
Maximum Altitude 2000m (6562 ft) to full safety specifications
Display size/type Main 5 digit + 2 x 5 digit secondary displays
Battery type 6 V, 7Ah sealed lead acid
Mains voltage input range 90 – 264 V, 50-60 Hz
Charge time 8 hours
Backlight LED backlight
Battery life 1000 Auto (3 sec) tests
Auto power down 300s
Mode Selection Rotary switch
Range selection Rotary switch
Weight 6.7 kg
Case dimensions L315mm x W285mm x H181mm
Pouch for test leads Yes (lid mounted)
Test leads DH4 lead set included
IP rating IP65 case closed, IP54 battery operation
Safety rating In accordance with IEC61010-1, CATIII 300 V when used with DH7 leads
Operating temperature and humidity +5ºC to +45ºC (41ºF to 113ºF) at full specification, -10°C to +50°C (14°F to 122°F) at reduced accuracy of ±0.5%, <90% RH
Storage temperature and humidity -25°C to +60°C, <90%RH
EMC In accordance with IEC61326-1 (Heavy industrial)
Noise rejection Less than 1% ±20 digits additional error with 100 mV peak 50/60 Hz. on the potential leads. Warning will show if hum or noise exceeds this level.
Maximum lead resistance 100 mΩ total for 10 A operation irrespective of battery condition.

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