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6290 Micro-Ohmmeters

The 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.

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.

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  • 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, lightweight and water-resistant
  • Test switchgear contact resistance
  • Test circuit breaker contact resistance
  • Test airframe bonding
  • Test rail bonding
  • Test pipeline bonding