Description
OM 21 / 22 micro-ohmmeters are used for 4-wire resistance measurement of very low values up to 20 KΩ with a high accuracy of 0.3% RDG and a 0.1 uΩ resolution. Reliability and accuracy of the instruments is improved by a low temperature coefficient of 10 ppm degree/C, automatic removal of EMF parasites before each measurement and compensation of ambient temperature.
Thanks to the choice of current waveform -pulse or AC current from 100 uA to 10 A- and high flexibility of trigger and sampling, OM 21 / 22 low resistance ohmmeters cover a wide range of applications:
-Cable resistance and resistivity measurement
-Inductive resistance measurement (motors and transformers winding resistance)
-Contact resistance measurement (connectors, switches, relays)
-Test of electrical components and heat sensitive devices
-Metallisation / earth bonding and ground continuity measurement
Powered from mains or from rechargeable batteries, both units are electronically calibrated, with no internal adjustment needed and are able to store 1,000 samples to to be read directly on the display or via Log OM data management software.
Functionalities
Measurement: Four-wire resistance
Range: Up to 20 KΩ, manual and auto ranging
High accuracy: 0.03 % RDG
Current: Pulse or AC current, from 100 uA to 10 A
High resolution: 0.1 uΩ
Low temperature coefficient: 10 ppm/degree C
Channel number: 2
Operating modes: 6 pre-set programs
Power: Mains and rechargeable battery
Communication modes: RS 232 and IEEE 488-2
Additional functions Digital calibration without internal adjustment, Alarms, error message...
Applications
Routine repetitive measurements
Test of cable resistance and resistivity
Metallisation and ground continuity
Contact resistance
Inductive resistance
Heat-sensitive devices
Log OM
Full configuration of OM21 and OM 22
Download, store, read and export data from the instruments
Scaling, statistical functions, alarms...
