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January 26, 2012

Introducing the New Micro-Ohmmeter
Model 6290

The AEMC® high-current Micro-Ohmmeter Model 6290 is a portable, microprocessor-controlled instrument. It has optimized filters and protection for measurements in electrical substations. The Model 6290 can be used to accurately measure very low contact resistances of high voltage circuit breakers, switches, busbars, etc., with test currents up to 200A. It employs the four-terminal Kelvin method to prevent errors caused by test leads and their contact resistances.

Measurement accuracy is guaranteed through a state-of-the-art signal amplification system, offset-free with high long-term stability. Resistance readings are shown in the alphanumeric display with up to 4½-digit resolution. It allows measurement resistances up to 20mΩ, and resolution of 0.1µΩ.

Test currents may be adjusted by the operator and are measured using an analog bargraph indicator and backlit digital display.

The Model 6290 has an internal memory for storing up to 200 readings. The USB interface may be connected to a computer to download the stored values. The high-current generation system is based on modern technology that allows for a significant decrease in both weight, 24.25 lbs (11 kg), and size. The case is made of hard plastic, highly resistant to impact and environmental conditions. Internal thermal sensors, in all sensitive components, prevent damage to the instrument caused by overheating.

This is a rugged but lightweight instrument, and may be easily carried by one person. It is water-resistant and can be used under poor weather conditions (IP54 with closed lid) offering an excellent performance working both in the laboratory and out in the field.


  • Accurately measures low contact resistances with test currents up to 200A
  • Measures resistances from 0 to 20mΩ
  • Resolution of 0.1µΩ
  • Analog bargraph indicator with backlit digital display
  • Stores up to 200 test results
  • USB interface
  • Direct printout using supplied software and a PC
  • Rugged, light-weight and water-resistant


  • Test switchgear contact resistance
  • Test circuit breaker contact resistance
  • Test airframe bonding
  • Test rail bonding
  • Test pipeline bonding

Full Product Information:
Model 6290  (Cat. #2129.82)

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