Weis has developed the Self Powered MM600 portable micro-ohm meter. It is used for measurement of resistance (μΩ) by injecting a heavy current through a breaker contact or load carrying joint.

A high current pulsed output (typically 600A DC) allows for testing of the latest arcing and main contacts that require 500-600A to determine the difference between them, as well as to see if they are able to carry such a current.


Back-lit 3½ digit LCD for readout of  or Amps.
Current On lamp indication (red).
Unit Armed lamp indication (green).
Trigger In (volt free contact) for Dynamic Micro-Ohm Test
(SA100 / SA100R / SA100RS required) and Trigger Out
(15V logic).
‘Operate’ push button for 600A pulse mode of operation.
Rotary Mode selector switch for Off / 199.9 / 1999.
LED indicators: Fault, Over Current, Battery Low and
Multipurpose accessory socket for in-car charging,
remote meter, power out, trigger in and trigger out.