Battery

• Type: Li-Po (User-replaceable)
  • 2 x 4 cells, 1300 mAh
•  Recharge time: 1 hour 

AC Adapter

• Input voltage 90 – 264 V AC, 47-63 Hz
• Output voltage 18 V DC
• Output current 3,33 A

Output data

• Test current range:
  • 1 mA – 10 A DC
  • *Test current is regulated and user-selectable
•  Maximum DC output voltage:
  • 16,8 V (4 cells x 4,2 V)

Measurement

•  Resistance range 0,1 μΩ – 5 kΩ
• Resolution
  • 0,1 – 999,9 μΩ: 0,1 μΩ
  • 1 – 9,999 mΩ: 1 μΩ
  • 10 – 99,99 mΩ: 10 μΩ
  • 100 – 999,9 mΩ: 0,1 mΩ
  • 1 – 9,999 Ω: 1 mΩ
  • 10 – 99,99 Ω: 10 mΩ
  • 100 – 999,9 Ω: 0,1 Ω
  • 1000 – 4999 Ω: 1 Ω
•  Typical accuracy
  ± (0,2 % rdg + 0,2% FS) – at the maximum used test current per range 
• The device is equipped with the overcurrent, overvoltage, and undervoltage protection
• Response time less than 3 seconds

Display

•  LCD display TFT 2.8 in (43,2 mm x 57,6 mm) / 1.8 in x 2.3 in 320 x 240 pixels

Memory

• Internal: 32 GB SD Card
• RMO-EH can store up to 10 000 measurements*
  • *Time and date stamped resistance, measured and selected test current, and voltage drop values

Interface

• Bluetooth communication

Environment conditions

• Operating temperature:
  • -10 ºC - +55 ºC / +14 ºF - +131 ºF
• Storage & transportation temperature:
  • -40 ºC - +70 ºC / -40 ºF - +158 ºF
•  Humidity: up to 95 %, non-condensing

Dimensions and Weight

• Dimensions (L x W x D):226 mm x 116 mm x 50 mm 8.9 in x 4.5 in x 1.9 in
• Weight: 0,95 kg / 2.1 lbs

Applicable Standards

• Installation/overvoltage: category II
• Pollution: degree 2
• Environmental tests, Shock: IEC 60068-2-27 
• Environmental tests, Vibrations: IEC 60068-2-6
• Safety: Directive 2014/35/EU (CE conform) Standard EN61010-1 (LVD Directive)
• EMC: Directive 2014/30/EU (CE conform) Standard EN 61326-1:2021

All specifications herein are valid at the rated battery voltage (or higher output voltage), ambient temperature of + 25 °C and recommended accessories. Specifications are subject to change without notice

The RMO-EH, battery-powered, and handheld micro-ohmmeter is the unique solution on the market manufactured for low (mΩ) resistance measurement. It is designed to provide fast, repeatable, and accurate measurements, where non-inductive resistance is checked during factory, maintenance, and commissioning inspections or testing in high-induction field environments. It is ideal for electrical substations and other facilities in which the availability of power supply is limited or when the lightweight, handheld, and easily portable test set with long test leads is required.

It provides a maximum of 10 A test current, and test leads even up to 200 m (on reels). It has a very user-friendly interface (1-click test), which is achieved with an intuitive keyboard, menu design, and remote-control probe with a test button. The weight of the RMO-EH is less than 1 kg.

The RMO-EH device can be used for various applications, such as:

• Wind turbines – lightning protection
• On-board aircraft electrical systems – bonding tests
• Rail vehicle, lines, and rail track joints testing
• Earthing systems continuity verification
• HV and MV disconnecting switches
• High-current busbar joints
• Oil and gas pipelines bonding
• Continuity of protective bonding conductors
• Welding joints
• Cable splices and cable resistance