Micro Ohmmeter RMO800G



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RMO800G is a Micro Ohmmeter based on a state of the art technology, using the most advanced switch mode technique available today. RMO800G generates a true DC ripple-free current with automatically regulated test ramps. During a test the RMO800G ramps with increasing current before measuring and decreasing current after the measurement. This eliminates magnetic transients. After the test current has been set, the automatic test procedure is started by pressing the O-button.

The RMO800G instrument can store internally up to 500 measurements. All measurements are time and date stamped. Using the DV-Win software a test can be performed from a user’s PC, and the results can be obtained directly on the PC. Communication between the RMO800G and a PC is through an USB (as standard) or an RS232 cable (as an option). Using the DV-Win the result can be arranged as an Excel spreadsheet which can be later shown as a diagram and printed for a report.

The set is equipped with a thermal and an overcurrent protection. The RMO800G has a very high ability to cancel electrostatic and electromagnetic interference in HV electric fields. It is achieved by very efficient filtration. The filtration is made utilizing a proprietary hardware and software.


Included accessories

  • DV-Win PC software
  • Ground (PE) cable
  • USB cable
Recommended accessories

  • Current cables 2 x 5 m 95 mm2 with battery clips
  • Sense cables 2 x 5 m with alligator clips
  • Cable bag
Optional accessories

  • Built-in thermal printer
  • Thermal paper roll
  • Remote Control Unit
  • Both Sides Grounded Unit
  • Test shunt 1000 A / 100 mV
  • Current cables 2 x 10 m 95 mm2
  • Sense cables 2 x 10 m with alligator clips
  • Cable plastic case


Technical data

Mains Power Supply
  • Connection
according to IEC/EN60320-1; C320
  • Mains supply
90 V – 264 V AC
  • Frequency
50/60 Hz
  • Input power
3860 VA (230 V AC); 2300 VA (115 V AC)
  • Fuse
20 A / 250 V, type F
Output data
  • Test current
10 A – 800 A DC
  • Full Load Voltage
    *At 230 V of supply voltage
4,7 V DC at 800 A
  • Resistance range
0,1 µΩ – 500,0 mΩ
  • Resolution
    • 0,1 µΩ – 999,9 µΩ
    • 1,000 mΩ – 9,999 mΩ
    • 10,00 mΩ – 99,99 mΩ
    • 100,0 mΩ – 499,9 mΩ
    • 0,1 µΩ
    • 1 µΩ
    • 10 µΩ
    • 0,1 mΩ
  • Typical accuracy
± (0,1 % rdg + 0,1 % FS)
  • Display
LCD screen 20 characters by 4 lines; LCD display with backlight, visible in bright sunlight
  • Interface
RMO800G is equipped with an USB port (optional: RS232) to connect to an external computer
Test Result Storage
  • Test Result Storage
RMO800G can store up to 500 measurements
Environment conditions
  • Operating temperature
–10°C – +55°C / 14 F – 131 F
  • Storage and transportation
–40°C – +70°C / -40 F – 158 F
  • Humidity
5 % – 95 % relative humidity, non condensing
  • Installation/overvoltage category
  • Pollution degree
Dimensions and Weight
  • Dimensions
480 mm x 197 mm x 395 mm
18,9 in x 7,75 in x 15,55 in
  • Weight
11,5 kg / 25,4 lb
  • Warranty
three years
Safety Standards
  • European standards
EN 61010-1
LVD 2006/95/EC
  • International standards
IEC 61010-1
UL 61010-1
CAN/CSA-C22.2 No. 61010-1, 2nd edition, including Amendment 1
Electromagnetic Compatibility (EMC)
  • CE conformity
EMC standard 89/336/EEC
EMC directive 2004/108/EC
  • Emission
EN 61326-1
  • Immunity
EN 61326-1

DV Win

RMO DV-Win Software provides several advanced features as a supplement to multiple functions of RMO devices. Testing in Continuous mode is upgraded with a sample time feature which allows user to record test results in specific time intervals set in seconds. After performed measurements results can be saved in a various formats and test report can be generated and saved or printed. Result can also be downloaded from the device to the PC by use of several different search filters.

For the RMO form of DV-Win software there is Help menu available, with detailed instructions and explanations of all functions and features.


Download brochure

Version: 300
Published: 2015-06-17

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