AOIP OM 10 Portable Micro-Ohmmeter Up To 50 KΩ And 100 Ma


  • 4-wire resistance measurement up to 50 KΩ at 10 µΩ resolution and 0.05% accuracy
  • Voltage measurement up to 400 V at 1 V resolution and 1% accuracy
  • Continuous measurement current for inductive loads: Coils, transformers, motor windings, twisted cables…
  • Pulse measurement current for non-selfic resistances: Earth bonding, ground continuity, contact resistances, non-twisted cables…
  • Automatic compensation of thermal E.M.F.
  • Temperature compensation
  • Metal temperature compensation

AOIP OM10 is a portable micro-ohmmeter that measures inductive and non-inductive resistances up to 50 KΩ using continuous or pulse measuring current up to 100 mA. It provides a resolution of 10 µΩ and an accuracy of 0.05%. The accuracy is maintained through automatic compensation of thermal electromagnetic forces, ambient temperature compensation (using an internal sensor set at 20°C), and metal type selection. Additionally, OM10 can measure DC and AC voltages up to 400 volts.


  • Cable resistance and resistivity measurement
  • Inductive resistance measurement (transformers, motors…)
  • Contact resistance measurement (connectors, switches, relays…)
  • Metallisation, earth bounding and ground continuity tests
  • Tests of low power electrical components (fuses…)
  • Tests of heat-sensitive devices
  • Tests of surface states, mechanical bonds and materials


Size 120 x 65 x 245 mm
Weight 1.1 Kg
Display LCD, 50,000 counts,13 mm high
Power supply 10 to 20 V 0.5 A
Internal batteries Type: Ni/Cd 1.7 Ah
Charging time: 14 h
Battery life: 10 h over 500 mΩ range
Reference range 23°C ±5°C (45 to 75% w/o condensing)
Operating reference range 0 to 50°C (RH: 20 to 75% w/o condensing)
Limit operating range -10°C to +55°C (RH: 10 to 80% w/o condensing)
Storage temperature limits -30°C to +60°C
(-15°C to +50°C with battery charged)
Indice de protection IP52 according to EN60529
Protections • 400 V peak when measuring resistances
• 600 V peak when measuring voltages
• Protection against ‘current’ circuit breaking during inductive resistance measurements
Class In accordance with EN 61010-1
Category III, pollution 2
Rated voltage  400 V
Chocks and vibrations EN61010-1
EMC conformity Immunity:
• EN 50082-1/1992
• Radiated: CEI 801-3/1984
• Conducted: CEI 801-4/1988.
• Electrostatic discharges : CEI 801-2/1991Conducted and radiated emissions:
• EN 55022, class B


AOIP OM 10 Portable micro-ohmmeter up to 50 KΩ and 100 mA-DpstarGroup