AOIP OM 17 Milliohmmeter 10A Portable Micro-Ohmmeter For Inductive & Non-Inductive Resistors


  • 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

AOIP OM 17 Milliohmmeter is designed for on-site use, whether in a workshop, on a platform, or outdoors. It has improved autonomy, allowing longer measurement sessions (up to 60 minutes) at 10 A DC, and faster charging of wound resistors (measurement stabilization in under 2 seconds). Easy to use, Simple to operate, it can measure both inductive and non-inductive resistances with DC or pulsed DC current up to 10 A using 4 wires. With high accuracy (0.05% L) and resolution (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

Users can configure all parameters either directly from the instrument or via software (LOG OM, available as an option). These parameters include measuring current, rating, resistance type, unit of measurement, reference temperature, alarm thresholds, and 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, only one operator is needed to perform measurements because the measurement starts automatically when continuity is detected between the two measurement points.

Users can program the type of metal or its temperature coefficient, set the reference temperature for the measured resistance, and adjust the ambient temperature. The ambient temperature can also be measured using an external temperature sensor. The OM 17 operates on battery power and can store up to 1000 measurements, usable from the device screen directly or transferable to PC via OM Log. Each measurement terminal on the device is protected up to 250 V. 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