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The RMO-H is a battery-operated handheld micro-ohmmeter. It is designed for a variety of applications for contact resistance measurement of non-inductive test objects. Typical applications are accurate testing of:
Even more, it accurately measures in high-induction field environments and substations, as well as in factory testing.
RMO-H Series contains six models in total, divided into 2 sub-series depending on the test lead length requirement and the battery type:
The test current is regulated and can be selected in a range of 1 A to a maximum of 300 A, depending on the maximum test current rating:
Unlike many other handheld micro-ohmmeters available on the market, our instruments have regulated and user-selectable test currents. Therefore, RMO-H instruments generate an automatically regulated test ramp with stable and ripple-free current during measurement. These revolutionary characteristics in handheld micro-ohmmeters technology are possible by using sophisticated Li-Po batteries. Consequently, modern battery technology enables you to do multiple measurements, and a full day of testing without recharging the battery.
With all RMO-H models, it is possible to make tests on Both Sides Grounded testing objects, in an increased safety environment. Finally, these features in combination with a user-friendly interface (1-click to measure) significantly speed up the testing procedure and make it safer.
These instruments store up to 10000 measurements on the internal micro SD card.
Our free DV Win software communicates with the RMO-H micro-ohmmeters via a wireless Bluetooth interface. Furthermore, it allows you to download test results, analyze them, and generate fully configurable test reports.
The RMO-H Series is a handheld micro-ohmmeter designed for accurate low-resistance measurements of non-inductive test objects. It is commonly used for contact resistance testing of circuit breakers, disconnecting switches, busbar joints, cable splices, welding joints, and grounding connections.
The RMO-H Series combines a lightweight handheld design with regulated DC test currents of up to 300 A. Unlike many battery-powered micro-ohmmeters, users can select a precise test current, which remains stable throughout the measurement.
The series includes six models: RMO-H1 and RMO-H21 (up to 100 A), RMO-H2 and RMO-H22 (up to 220 A), and RMO-H3 and RMO-H23 (up to 300 A). The RMO-H21, RMO-H22, and RMO-H23 models are optimized for the us of longer test leads.
Contact resistance testing helps identify worn contacts, corrosion, loose connections, and other defects that can lead to overheating, increased power losses, reduced efficiency, and premature equipment failure.
Yes. The RMO-H Series uses the Kelvin four-wire measurement method, which eliminates the influence of test lead resistance and provides highly accurate low-resistance measurements.
Yes. The RMO-H Series supports Both Sides Grounded measurements, allowing safer testing of circuit breakers, switchgear, and other equipment in substation environments.
The RMO-H weighs approximately 0.95 kg and is designed for one-hand operation, making it ideal for field testing, elevated work platforms, and locations with limited access.
Yes. The instrument stores up to 10,000 measurements with date and time stamps. Results can be transferred via Bluetooth to DV-Win software for analysis, reporting, and documentation.
The RMO-H Series measures resistance values from 0.1 μΩ up to 3000 mΩ with high accuracy and resolution.
Yes. The instrument is widely used during manufacturing, factory acceptance testing, commissioning, and routine maintenance inspections of electrical equipment.
