AOIP-Onsite micro-ohmmeter up to 10 A (Model:OM 16)

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 Designed for field use as well indoor as outdoor, OM 16 micro-ohmmeter performs 4-wire measurements of inductive and non-inductive resistances with continuous, pulse or AC measuring current up to 10 A. Offering a high accuracy of 0.05 % and resolution of 0.1 µΩ, it works over a large selectable range of resistances from 5 mΩ up to 2.5 KΩ.

Designed for field use as well indoor as outdoor, OM 16 micro-ohmmeter performs 4-wire measurements of inductive and non-inductive resistances with continuous, pulse or AC measuring current up to 10 A. Offering a high accuracy of 0.05 % and resolution of 0.1 µΩ, it works over a large selectable range of resistances from 5 mΩ up to 2.5 KΩ. 

All parameters are user-programmable, either directly through the instrument interface or via Log OM software delivered in option: measuring current, range, unit, alarmes, automatic average function, absolute autozero. Before every measurement, EMFs are measured and automatically removed for a greater accuracy of measurements. For non-inductive resistances, a single operator is enough to perform the measurement since it will be automatically triggered once continuity is established between the two points.

The user can also set the metal nature or its temperature coefficient, the reference temperature and the ambient temperature. The ambient temperature might be also measured by an external temperature probe.

2 alarm thresholds are programmable and either notified by a signal displayed on the screen, a light or a loud beeper.

The large interactive display of OM 16 informs in real time the operator about the type of measurement, range, calculation conditions and threshold values. 

Battery-powered, OM16 has a high storage capacity of 1,000 measurements to be read directly on the display or via Log OM software or printer available in option.

Protection up to 250 V is ensured at every measurement terminal, while any overrange, open circuit or empty battery signal detected is notified by LEDs and messages displayed.

Easy-to-use, rugged and protected agains rough environment (IP 53 when opened, IP 64 when closed), OM 16 is widely used indoors and outdoors in many industries:

  • Aerospace
  • Energy field
  • Domestic electrical appliances
  • Cable manufacturing
  • Telecommunication
  • Electronics
  • Automotive industry
  • Railway

Resistance measurement

Measurement range Resolution Accuracy (1 year)
(23°C ±5°C)
Measuring current Voltage drop
5 mΩ 0.1 μΩ 0.05 % + 0.5 μΩ 10 A 50 mV
25 mΩ 1 μΩ 0.05 % + 3 μΩ 10 A 250 mV
250 mΩ 10 μΩ 0.05 % + 30 μΩ 10 A 2.5 V
2500 mΩ 0.1 mΩ 0.05 % + 0.3 mΩ 1 A 2.5 V
25 Ω 1 mΩ 0.05 % + 3 mΩ 100 mA 2.5 V
250 Ω 10 mΩ 0.05 % + 30 mΩ 10 mA 2.5 V
2500 Ω 100 mΩ 0.05 % + 300 mΩ 1 mA 2.5 V

Automatic or manual selection of measurement range
Accuracy given in % of reading + fixed value at 23°C ± 5°C
Possible excess over the normal rating:

  • 5 mΩ range: + 20 %
  • 25 mΩ range: + 20 %

Maximum voltage between the terminals in an open circuit: 7V.

Further features

Resistance types
  • Inductive resistances: Coils, transformers, motor windings…
  • Non-inductive resistances: Earth bonding, coating, contact resistances…
Measurement current DC current from 1 mA to 10 A
Continuous ou pulsed
Measurement trigger conditions Manual or automatic trigger allowing a single operator to be able to perform measurements
EMFs Automatic compensation of EMF parasites before each measurement for a greater accuracy
Temperature compensation Choice of metal temperature coefficient
Choice of reference temperature and ambient temperature (programmed or measured with integrated sensor)
Temperature compensation for measurements at Tref Saisie ou mesurée par Pt100 interne ou externe reliée à l’instrument
Résolution : 0,1°C
Précision : ± 0,5°C
(Tref = Température de reference programmée, à laquelle la mesure est ramenée)
Temperature coefficient beyond operating range <10% accuracy/°C (from 0 to18°C and from 28 to 50°C)
Alarms 2 programmable thresholds with visuel and sound signal
Calibration Digital calibration without internal adjustment

Resource & Download

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