Megger DLRO10 Low Resistance Ohmmeter

  • Outputs up to 10 A DC to measure resistance from 0.1 µ ohms - 2000 ohms
  • Multiple operating modes including fully automatic
  • Manual, Auto, Continuous and Inductive measurement modes
More Info

Megger DLRO10 Low Resistance Ohmmeter

The Megger DLRO10 Low Resistance Ohmmeter offers automatic testing by selecting the most suitable test current (up to 10A DC), in order to measure resistance from 0.1 micro ohms to 2000 ohms across seven ranges.

The DLRO10 micro ohmmeter is built into a strong, lightweight case that is at home in either the field or in the laboratory. Light enough to be worn around the neck and small enough to be taken into areas which were previously too small to access, the DLRO 10 uses a large, bright 4-1/2-digit LED display to produce low resistance readings in under 3 seconds.

Megger DLRO10 Key Features:

  • Accurate results in under three seconds
  • Auto current reversal cancels standing emfs
  • Fuse protected to 600 V
  • NiMH battery reduces weight
  • 250 mW power limit (with optional override) to avoid heating the test sample
  • Automatically detects continuity in potential and current connections
  • Visible warning of high voltages present at the terminals
  • Visible warning of current flowing in the test sample
  • Multiple operating modes including fully automatic

Which Test Leads?

The Megger DLRO10 Micro-Ohmmeter can be supplied without test leads or with two Megger 1.2m DH4 Duplex handspikes with indicator lights (6111-503) selectable above.

Other test lead sets are available to purchase with the Megger DLRO10, including the popular choices of the Megger 2.5m DH5 Duplex handspikes (6111-517) and the 600V rated CAT III DH6 Megger Duplex handspikes (6111-518) which can be selected from the options above.

Wind turbine lightning protection testing is made possible with the options of a 30m, 60m or a 100m extension reel. The 100m Megger KC100 Reel (1000-809) can be selected above, although for a full list of available test leads, please click here and contact us for a price and availability.

DLRO Model Comparison

Nominal Current Up to 10A Up to 10A Up to 10A
No. of ranges with power limited to 0.25W 6 6 6
No. of higher power ranges 2 - -
Display LCD Backlit LCD Backlit LED 4½ digit
Results storage and download -
Power supply -
Mains Optional Optional
Rechargable battery
Weight 6.7 kg 2.6 kg 2.6 kg

What's In The Box?

7 Ah NiMH battery module. 6121-492
2 x DH4 Duplex handspikes (optional, please select above)
one with indicator lights. 1.2m / 4 ft 6111-503
Battery charger for operation from 115/230 V .
50/60Hz supply. 6280-333
Cigar lighter adapter for battery charging. 6280-332
User guide. 6172-473
Warranty book. 6170-618

  • Measurement mode: (DLRO 10) Manual, Auto, Continuous, Inductive; (DLRO 10X) Manual, Auto, Continuous, Inductive, Undirections
  • Measurement control: (DLRO 10) Fully Automatic; (DLRO 10X) Fully Automatic/Manual
  • Measurement speed: <3s for forward and reverse current and to display average
  • Display: 4 1/2 digit seven segment LED 
  • Range and safety: (DLRO10) LED indications; (DLRO10X) Large backlight LCD 
  • Test method: Single cycle reversing d.c. ratiometric measurement - average result display. 
  • Test current accuracy: ±10%
  • Test current stability: <10ppm per second
  • Lead resistance: Maximum 100 mΩ total for 10 A operation irrespective of battery condition
  • Voltmeter input impedance: >200kΩ
  • 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.
  • Data transfer: (DLRO10X) Real Time or from storage via RS232 
  • Data storage: (DLRO10X) 700 tests
  • Memo field: (DLRO10X) Up to 200 characters per test via integral alphanumeric keypad
  • Battery type: 7Ah NimH rechargeable
  • Battery life: Typical 1000 x 10A tests before rechargeable
  • Battery charge time: Via external 90 V - 260 V 50/60 Hz charger from 12 to 15 V dc supply; Standard: 2.5 hours to 90% capacity, 4 hours to fully charged; Slow Charge: +10 °C to + 45 °C
(50 °F to 113 °F) 
  • Operating temperature range and humidity: +5 °C to +45 °C (41 °F to 113 °F) at full accuracy; -10 °C to +50 °C (14 °F to 122 °F) at reduced accuracy; <90% RH @ 40 °C (104 °F) non-condensing 
  • Storage temperature range and humidity: -30 °C to +70 °C (50 °F to 113 °F); <90% RH @ 40 °C (104 °F) non-condensing
  • Temperature co-efficient: <0.01% per °C, over range 5 °C to 40 °C (<0.0006% per °F from 41 °F to 104 °F) 
  • Maximum altitude: 2000m (6562 ft) to full safety speci cations 
  • Safety: In accordance with IEC61010-1, CAT III 600 V - only when DH6 leads are used 
  • EMC: IP65 case closed, IP54 battery operation 
  • Dimensions: 220 x 100 x 237mm
  • Weight: 2.6kg
Label Type Size Download
pdf Megger DLRO Test Leads pdf 937.5 KB Download
pdf Megger DLRO10 Datasheet pdf 412.6 KB Download