Low resistance measurementscan help indicate any restrictions in current flow that might prevent a machine from generating its full power, or insufficient current to flow where activation of protective devices could be restricted as a result of a fault.
The front end of the AEMC 6250 Micro-Ohmmeter employs a four-wire Kelvin configuration, which eliminates test lead resistance for a measurement accuracy of 0.05%, and a built-in circuit filters out AC signals.
One of the best methods of testing the current carrying efficiency of conductor junctions is by measuring the junction resistance. Circuit breaker or relay contacts, bus bars and switchgears constantly carry high currents. If the junctions deteriorate, the current carrying efficiency may be reduced and cause several problems like welding of contacts, localized Ohmic heating and eventual component failure.
When testing for electrical problems in various types of equipment, a low resistance ohmmeter will locate most issues. The versatility and usefulness of low resistance ohmmeters make them a preferred tool of technicians in a broad range of residential, commercial and industrial applications.