The MH-10 is a portable digital micro-ohmmeter controlled by a microprocessor. It works as a highly precised reading instrument which provides measurement of extremely low resistances in circuit breaker contacts, keys, conductive bars, transformer coils/motors, weld points and many more. They measure test currents that ranges from 1 mA up to 10 A. The meters are operates with the 4 arm method to prevent resistance effects on injection tables. The test current is adjustable through an operator. Values are attained through a comparison with a high stability internal pattern. A readable alphanumeric display shows the results.