The continuous current micro-ohmmeter RMO-C is the most powerful series of DV Power micro-ohmmeters with increased output capabilities and unlimited test duration at 200 A DC test current. RMO300C and RMO500C models can also generate 300 A current during 10 min.

RMO-C is designed for contact resistance measurement of non-inductive test objects and applications with increased safety requirements. It tests medium and high-voltage circuit breakers, disconnecting switches, high-current bus bar joints, cable splices, and different high-current links. Due to Both Sides Grounded and Remote Control functionalities, the instrument accurately measures even in the most demanding environments, providing additional safety to testing personnel.

The instruments are placed in an unbreakable plastic case with an IP67 protective rating (with a closed lid). Although very portable and lightweight, RMO-C micro-ohmmeters have very high output power capabilities. High output voltage enables a wider measurement range at higher test currents. Consequently, it enables the usage of thinner/longer test cables. RMO-C generates a true DC ripple-free (less than 1 % ripple) current with automatically regulated test ramps. During the testing, it increases current before measuring and decreases current after the measurement. This significantly decreases magnetic transients and ensures great accuracy.

Special current clamps measure a current through groundings when the instrument tests in BSG conditions. The instrument itself powers these clamps. If an even higher safety level is required, the Remote Control feature enables the operator to perform measurements from distant locations.

RMO-C instruments can store up to 500 measurements in internal memory. Also, they have a USB flash drive available as an option. An additional feature is the built-in High Precision module suitable for measurement of very low resistance values, in the range from 1 to 30 µΩ, with 0,01 µΩ resolution.

Our free DV Win software communicates with the RMO-C micro-ohmmeters via a USB interface. It allows a user to run the test remotely from a PC. Also, a user can download test results,  analyze them, and generate fully configurable test reports through the software.