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OM 21

OM 21
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Programmable table micro-ohmmeter – High accuracy: 0.03 % OM 21 benchtop micro-ohmmeter is used for 4-wire measurement of very low resistance values up to 20 kΩ with an accuracy of 0.03% RDG and a 0.1 µΩ resolution. The reliability and accuracy of the measurements is improved by a low temperature coefficient of 10 ppm/°C, automatic removal of EMF parasites before each measurement, metal temperature compensation and compensation of ambient temperature.

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Description OM 21 benchtop micro-ohmmeter is used for 4-wire measurement of very low resistance values up to 20 kΩ with an accuracy of 0.03% RDG and a 0.1 µΩ resolution. The reliability and accuracy of the measurements is improved by a low temperature coefficient of 10 ppm/°C, automatic removal of EMF parasites before each measurement, metal temperature compensation and compensation of ambient temperature. With three current waveforms available -continuous, pulse or AC current- from 100 µA to 10 A and high flexibility of trigger and sampling conditions, OM 21 low resistance ohmmeter covers...

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Specifications Resistance measurement Range Measuring current Voltage drop Automatic or manual selection of measurement range Accuracy given in % of reading + counts over 90 days at 23 ±1°C Maximum capacity: 26,000 counts Max. open circuit voltage: 3 V (can be limited to 20 mV or 50 mV at the terminals of the resistor to be measured) Further features Resistance types Inductive resistances: Coils, transformers, motor windings... Non-inductive resistances: Earth

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bonding, coating, contact resistances... Measuring current Internal or external source DC current from 100 µA to 10 A Continuous, pulsed or pulsed alternated Measurement time < 1 s in direct current mode < 1,5 s in pulse current mode < 2 s in alternate current mode Measurement trigger conditions Manual or automatic trigger from 2 measures/s to 1 measure/9h, allowing a single operator to be able to perform measurements Automatic compensation of EMF parasites before each measurement for a greater accuracy Temperature compensation Choice of metal temperature coefficient Choice of ambient...

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Battery with internal charger(option) Type: 12 V battery pack Battery life:2 to 8 h according to use Charging time: 14 h Communication ports RS 232 in standard IEEE 488-2 in option Allows programming, data management and unit calibration directly from a computer Storage capacity 1,000 measurements with average, minimum and maximum value Memory reading directly on the display or through digital and analogue interfaces Environmental specifications Reference range Operating reference range Limit operating range Storage temperature limits -30°C to +55°C (- 15°C to + 50°C for model with battery)...

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Models and accessories Instrument: OM 21-1 Programmable benchtop micro-ohmmeter With RS 232 interface Programmable benchtop micro-ohmmeter With RS 232 interface and battery + charger Programmable benchtop micro-ohmmeter With RS 232 interface and IEEE 488 Programmable benchtop micro-ohmmeter With RS 232 interface, IEEE 488 and battery + charger Clips and probes: Please note that 2 clips are needed per OM 21. AN5806-2 Gold plated Kelvin clips, set of 2 Opening diameter: 12 mm, cable length: 2 m Kelvin clips, set of 2 Opening diameter: 12 mm, cable length: 3 m Test probe, per unit Cable...

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