T&R Digital Micro-Ohmmeter DMO200

  • Ultra lightweight (6.9kg)
  • 1-200A DC test current with <2.5% ripple
  • Supplied with standard 3m output lead set
  • 0.1μΩ resolution
  • mV, A, and m/μΩ displayed simultaneously
  • 100A continuous current
  • USB memory key for data storage
  • USB keyboard for comment entry
  • Pre-settable test current with three buttons to store user test currents
  • Large back-lit liquid crystal display
  • Universal supply voltage 90-264V
  • Thermal and over-current protection
  • Optional current clamp to allows testing of objects with both sides earthed
  • IP rating 54


The DMO200 Digital Micro-Ohmmeter is a highly versatile and reliable device designed for precise measurement of low resistances. It excels in various applications, making it suitable for commissioning, maintenance, and production line environments. Additionally, it enables efficient and safe measurement of contact resistances in circuit breakers, switch panels, isolators, and busbar joints.

Operating the DMO200 Digital Micro-Ohmmeter is remarkably simple. With just a few steps, users can effortlessly select the desired test current and activate the output. The unit offers the convenience of presettable test currents, allowing users to store commonly used settings for quick access. Moreover, range selection is fully automatic, ensuring accurate measurements at all times. The simultaneous display of current, voltage, and resistance provides comprehensive insights. By calculating resistance based on the test current and sense voltage, the unit delivers precise and reliable results. All readings are held on the display even when the output is switched off, facilitating easy reference.

Further enhancing usability and data management, the DMO200 features results storage capabilities. Users can conveniently save test results using a USB memory key. Additionally, the unit comes equipped with a USB keyboard. This enables the input of comments that can be stored alongside the readings. This comprehensive approach ensures that results are organized, time-stamped, and saved in a CSV file format, streamlining analysis and record-keeping processes.

The DMO200 Digital Micro-Ohmmeter boasts a bright and clear backlit display with a wide viewing angle, guaranteeing optimal visibility even in various lighting conditions. Users can swiftly assess test results as they appear on the display, providing immediate access to crucial information such as current, sense voltage, and resistance.


Operating Manual


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