Micro Ohmmeters

RMO-A series

Powerful and lightweight Micro Ohmmeters with IP43 protective rating

RMO-G series

Micro Ohmmeters with Both Sides Grounded feature

RMO-D series

Micro Ohmmeters with Both Sides Grounded and Demagnetization features

RMO-H series

Handheld, battery operated micro ohmmeters

Picture rmoa rmog rmod rmoh
Models RMO100A, RMO200A, RMO300A, RMO400A, RMO500A, RMO600A RMO100G, RMO200G, RMO300G,RMO400G, RMO500G, RMO600G, RMO800G RMO200D, RMO500D, RMO600D RMO-H2 and RMO-H3
Current Range 5 A – *600 A

*600A for RMO600A model, 100 A for RMO100A

5 A – *800 A

*800A for RMO800G model, 100 A for RMO100G

5 A – *600 A

*600A for RMO600D model, 200 A for RMO200D

Up to *300 A

*Up to 220A for RMO-H2,
*Up to 300A for RMO-H3

Resistance Range 0,1 µΩ – 999,9 mΩ 0,1 µΩ – 999,9 mΩ 0,1 µΩ – 999,9 mΩ 0,1 µΩ – 2000 mΩ
Resolution 0,1 µΩ 0,1 µΩ 0,1 µΩ 0,1 µΩ
Accuracy ± (0,1 % rdg + 0,1 % FS) ± (0,1 % rdg + 0,1 % FS) ± (0,1 % rdg + 0,1 % FS) ± (0,1 % rdg + 0,1 % FS)
SINGLE / CONTIN test YES YES YES SINGLE
DTRtest mode YES YES YES NO
Both Sides Grounded NO YES (with current clamps) YES (with current clamps) YES
Demagnetization feature NO NO YES NO
Built-in thermal printer YES (optional) YES (optional) YES (optional) NO
Pass/Fail criteria YES (Rmax feature) YES (Rmax feature) YES (Rmax feature) YES (Rmax feature)
Communication ports USB
RS232 (optional)
Bluetooth (optional)
USB
RS232 (optional)
Bluetooth (optional)
USB
RS232 (optional)
Bluetooth (optional)
Bluetooth
PC Software YES (DV-Win software) YES (DV-Win software) YES (DV-Win software) YES (DV-Win software)

Applications

  • Power circuit breakers (including dead-tank circuit breakers)
  • Disconnecting switches
  • Interrupters
  • Bar installation
  • Cable splices
  • Welded joints
  • Groundings

The Micro Ohmmeters – RMO series instruments are designed for contact resistance measurement of non-inductive test objects. RMO instruments are based on state of the art technology, using the most advanced switch mode technique available today. RMO generates a true (ripple free) DC current with automatically regulated test ramps. During the test RMO ramps with increasing current before measuring and decreasing current after the measurement. This approach significantly reduces magnetic transients.

With over 15 Years in designing and manufacturing Micro Ohmmeters, DV Power has established wide range with 16 portable and 2 handheld models of high-precision micro ohmmeters.

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