10A Portable Micro-ohmmeter For Inductive & Non-inductive Resistors – AOIP OM 17 Milliohmmeter


  • Measures 4 wires of inductive and non-inductive resistances
  • DC or pulsed DC current, from 1 mA to 10 A
  • Measurement accuracy: 0.05% Reading
  • Automatic FEM compensation
  • Room temperature compensation (measured or programmed)
  • Compensation of the metal temperature coefficient
  • Choice of reference temperature
  • 2 programmable alarm thresholds, visual and audible signal
  • Memory: 1000 identified measurements
  • Ideal for long-term tests at 10 A on transformers

Designed for use on site – in the workshop, on a platform or outdoors – the OM 17 micro-ohmmeter is above all a field device with performance worthy of a laboratory device. Successor of the OM 16, the OM 17 offers improved performance, especially in the case of inductive resistances: With better autonomy, it allows longer measurement campaigns (up to 60 min) at 10 A in direct current and provides faster charging of the wound resistors (stabilization of the measurement <2 s). Easy to use, it measures in 4 wires any inductive or non-inductive resistance with DC or pulsed DC current up to 10 A. Offering a high accuracy of 0.05% L and a resolution of 0.1 µΩ, it covers a wide range of selectable ratings from 5 mΩ to 2.5 kΩ.

Easy to use, robust and well protected (IP 53 box open / IP 64 closed, metal measuring terminals with locking mechanism), the OM 17 is very popular in different industries:

  • Aeronautics
  • Energy
  • Home appliance
  • Wire and cable manufacturing
  • Telecommunication
  • Electronic
  • Automobile
  • Railway

Wide Fields Of Applications

  • Metallization and ground continuity check
  • Quality control of welds
  • Contact resistance test (low voltage connectors, relays, etc.)
  • Electronic components test
  • Resistance measurement, calculation of losses and heating of coils, transformers, motors
  • Resistivity and length of flat and braided cables
  • Railway network, electrical network maintenance

Two forms of current

Direct current

  • Inductive resistors, coils
  • Automatic triggering of measurements with the use of a trigger probe
  • Compensation of the FEMs before triggering of the measures

Pulsed current

  • Non-inductive resistors
  • Automatic release when continuity is established – 1 operator is sufficient
  • Automatic current stop at the end of the measurement
  • FEM compensation at each measurement

Configuration and display

All parameters are configurable by the user, from the instrument or by software (LOG OM, supplied as an option): Measuring current, rating, resistance type, unit of measurement, reference temperature, value and state of alarm thresholds, calculations … The large screen of the OM 17 informs the user in real time of the measurement conditions. Any detection of overshoot, open circuit or low battery is indicated by LEDs and messages on the screen. Before each measurement, the electromagnetic forces are measured and automatically compensated for greater measurement accuracy. For non-inductive resistances, a single operator is sufficient to carry out the measurements since the measurement is triggered automatically when continuity is established between the two measurement points.

The user can also program the nature of the metal or its temperature coefficient, the reference temperature to which the measured resistance will be brought down and the ambient temperature. The ambient temperature can also be measured using an external temperature sensor. Usable on battery only, the OM 17 has a storage capacity of 1000 measurements, usable from the device screen directly or transferable to PC via OM Log. Protection up to 250 V is ensured at each measurement terminal, while any detection of overshooting of rating, open circuit or low battery is signaled by LEDs and messages on the screen.


Dimensions L x W x H 270 x 250 x 180 mm
Mass 4 kg
Food 100 to 240 V (50/60 Hz)
Drums Type: Ni / Mh 8.5 Ah (Size D)
Charging time: 5 h
Autonomy:> 5000 ech. (pulsed),> 60 min (direct current on 250 mΩ rating at 10 A)
Communication interfaces RS 232
Memory 1000 measurements identified by number
Memory reading on the screen, by software or via a printer
Reference area 23 ° C ± 5 ° C (45 to 75% RH non-condensing)
Nominal operating range 0 to 50 ° C (20 to 75% RH non-condensing)
Operating limit range -10 ° C to + 55 ° C (10 to 80% RH non-condensing)
Storage conditions -40 ° C to + 60 ° C (-15 ° C to + 50 ° C with battery charged)
Protection sign IP53 open / IP64 closed, according to EN 60529
Protections • Electronics: Up to 250 V on ‘voltage’ wires
• By fuse on the ‘current’ wires
• Against the opening of the ‘current’ circuit in measurement of inductive resistances
Assignment voltage with respect to earth 60 V
Electrical safety EN 61010-1
EMC compliance EN 61326
• Electrostatic discharges: EN 61000-4-2
• Radiated fields: EN 61000-4-3
• Shock waves: EN 61000-4-5
• Conducted disturbances: EN 61000-4-6
• Voltage dip: EN 61000-4-11
• Salvo: EN 61000-4-4Radiated emission and conduct:
• EN 55022, class B
• EN 61000-3-2
• EN 61000-3-3


AOIP OM 17 Field 10A micro-ohmmeter for inductive and non-inductive resistance-DpstarGroup


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