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Megger DLRO10HD Dual Power 10A Low Resistance Ohmmeter

The Megger DLRO10HD Dual Power 10A Low Resistance Ohmmeter. Part No: 1006-603

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including VAT @ 20%)
  • Multiple operating modes
  • Quick, accurate results
  • 0.1 µΩ to 2000 Ω
  • Fuse protected to 600 V
  • 10A for 60 seconds
  • IP65 rated
  • Small and weighs less than 15 kg
  • FreeDelivery
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Megger DLRO10HD Dual Power 10A Low Resistance Ohmmeter

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.

Key Features:

• 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


Test Current Resistance Range Resolution
(as displayed)
Basic Accuracy* Full Scale Voltage Max Power Output
0.1mA 0 to 
0.1 Ω ±0.2% 25 mV 25 μW
0.1mA 0 to
250.00 Ω
0.01 Ω ±0.2% 25 mV 2.5 μW
1mA 0 to
25.000 Ω
1 mΩ ±0.2% 25 mV 25 μW
10mA 0 to
2500.0 mΩ
0.1 mΩ ±0.2% 25 mV 250 μW
100mA 0 to
250.00 mΩ
0.01 mΩ ±0.2% 25 mV 2.5 μW
1A 0 to
25.000 mΩ
1 μΩ ±0.2% 25 mV 25 mW
10A 0 to
2500.0 µΩ
0.1 μΩ ±0.2% 25 mV 0.25 W
1A 0 to
2500.0 mΩ
0.1 mΩ ±0.2% 2.5 V 2.5W
10A 0 to
250.00 mΩ
0.01 mΩ ±0.2% 2.5 V 25W

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.

Measurements on electric motors and generators will be inductive and require the user to understand the inductive mode and charging process before a correct result is achieved.

The DLRO10HD is well suited to measuring thick conductors, bonds and quality of welding because of its 10 A range for resistance values up to 250 mΩ.

Electromagnetic noise induced into the leads can interfere with a reading. A noise symbol alerts the user and prevents a measurement when the instrument detects noise above its threshold.

When dissimilar metals are joined a thermocouple effect is created. Users should select a bidirectional mode to ensure cancellation of this effect. The instrument measures with current flowing in both directions and averages the result.

Normal mode is initiated by pressing the ‘Test’button after connecting the test leads to the unit under test. Continuity of all four connections is checked. Current is applied in both forward and reverse direction following which measurement is displayed.

Automatic mode is started as soon as the probes make contact. Forward and reverse current measurements are made and the average value is displayed. This mode is ideal when working with the supplied DH4 handspikes. Each time the probes are removed and reconnected to the load a new test will be performed without the need to press the test button.

TEST 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 stabilise 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 stabilises. The operator decides when the result is stable and presses the ‘Test’button to terminate the test.

Megger DLRO10HD Dual Power 10A Low Resistance Ohmmeter
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
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 L315 mm x W285 mm x H181 mm
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 300V when used with optional terminal cover (details in ordering information)
Operating Temp/Humidity -10 °C to +50 °C
(14 °F to 122 °F) <90% RH
Reference Conditions 20 °C ±3 °C
Storage Temp/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.

Standard Delivery 3-5 Day Delivery – UK
£2.95 for all all orders under £40.00 (exld vat). Sent by Royal Mail Tracked, delivered/posted within 3-5 working days from the date of your order, subject to availability.

Standard Free Delivery 3-5 Day Delivery – UK Mainland only - Zone A & B
Included in the price for all orders over £40.00 (exld vat). Sent using FedEx, delivered within 3-5 working days from the date of your order, subject to availability.

Express DPD Delivery 1-2 Day Delivery – UK Mainland only - Zone A & B
£4.50 select at the checkout. Sent using DPD on their Award Winning “Predict” Service with these great key benefits:

  • You are given a one hour delivery window. (no more waiting in all day for your parcel)
  • You are notified by text or e-mail on your parcels progress.
  • Change of plan? You can easily use the text or e-mail to rearrange your delivery.
  • Notifications on your parcel up to 15 minutes before delivery.

Orders must be placed before 3pm for next day delivery and a mobile number supplied, subject to availability.

Next Day Delivery – UK Mainland only - Zone A & B
£8.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for next day delivery, subject to availability.

Saturday Pre 12am - UK Mainland only - Zone A & B
£15.00 select at the checkout. Sent using FedEx, orders must be placed before 3pm for Saturday delivery.

Delivery Surcharges
Because of the high cost of carriage we need to apply a surcharge on all deliveries made in the following regions: 

  • Scotland, Isle of Wight & Isles of Scilly - £6.00  
  • Scottish Highlands and Northern Ireland - £12.00  Zone C
  • Scottish Islands, Isle of Man and Channel Islands - £14.00  Zone D
  • Southern Island - £15.00  Zone E


 International delivery

International delivery charges are automatically added to your order at the checkout; you can also use the guide below for a guide on prices. For any questions regarding international deliveries please contact us at

 Zone 1:

  • France, Germany, Belgium, Netherlands, Luxembourg. £20.00 per parcel

Zone 2:

  • Austria, Denmark. £22.00 per parcel
  • Liechtenstein, Switzerland £47.00 per parcel (added cost for custom clearance surcharge)

Zone 3:

  • Czech Republic, Italy, Slovakia, Spain. £28.00 per parcel

Zone 4:

  • Estonia, Finland, Hungary, Poland, Portugal, Slovenia, Sweden. £50.00 per parcel

Zone 5:

  • Bulgaria, Croatia, Greece (incl islands) Latvia, Lithuania, Romania. £60.00 per parcel

Bosnia-Herzegovina, Iceland, Norway, Serbia. £85.00 per (added cost for custom clearance surcharge)

If no shipping option is available to your selected country.  Please call us on +44 (0) 1603 406 148 to purchase your items.