DSM600 High Current Micro-Ohmmeter


  • 0-600A DC test current
  • 0.1μΩ resolution
  • mV, A, and mΩ/μΩ displayed simultaneously
  • Direct Ohms reading at any current
  • Large back-lit liquid crystal display
  • Thermal and over-current protection
  • Compact and portable
  • Isolated RS232 interface for printer or PC connection
  • 90-264V Supply voltage range*
  • High quality 3m lead set supplied as standard

*See output ratings section below for details

Product Data

T&R Test Equipment is a market leader in the field of high current micro-ohmmeters, manufacturing durable, accurate and user friendly units. The DSM600 is a high current micro-ohmmeter suitable for measuring very low resistances in a wide range of applications. The unit is equally suited to commissioning, maintenance, and production line environments. Contact resistances in circuit breakers, switch panels, isolators, and busbar joints are all easily and safely measured.

The DSM600 is simple to operate, only requiring the user to switch the output on and set the test current. Selection of all ranges is fully automatic, and current, voltage and resistance are displayed simultaneously at all times. The resistance is calculated from the test current and sense voltage, and there is no need to set an exact test current to guarantee an accurate test result. To assist the user, all readings are held on the display when the output is switched off.

The back-lit display on the DSM600 is bright and clear with a wide viewing angle. The results of a test can be seen here as they appear on the display of the unit, showing current, sense voltage and resistance

Connecting the DSM600 to a PC running the optional DSMlog software adds data capture and reporting functions to the unit, allowing test results to be exported directly to Excel or saved to a file. All results are time stamped, and a comment may be added to each test. Data capture can be controlled from the PC, and the resistance of a test object can be monitored over a period of time.


Alternatively, connecting a printer allows all of the test parameters to be printed automatically whenever the reading is held.


Spare fuses
Supply lead
3 metre output lead set
Operating manual

Optional accessories

DSM600 printer
DSMlog software
Lead set extension
1m lead set for increased output current with low mains voltages
100µΩ shunt
Longer leads sets are available to order.
Remote control sense leads (allows the output to be switched on and off from the sense probes).