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The MPK-105x high-current micro-ohmmeter is a portable, microprocessor-controlled instrument. Has optimized filters and protections for measurements in electrical substations. Can be used to accurately measure very low contact resistances of high voltage circuitbreakers and switches, busbars, etc., with test currents up to 100A. It employs the 4 terminals-method (U/I measuring principle) to avoid errors caused by test leads and their contact resistances.

Test currents 
to 100 A (True DC). 
The test current can be set between 10% and 100% of the working stream with a resolution of 1 A. 

Resistance ranges 
0.1 µΩ to 300 mΩ. 

Measurement Principle 
Four-terminal, Kelvin-type. 

Test with programmable time 
Allows programming the test period of 5 seconds to 120 seconds.

Continuous operation time 
At 200 A this equipment may be used continuously for aprox. 1 minute before the thermal protection activates.
At 100 A this equipment may be used continuously for aprox. 15 minutes before the thermal protection activates. 

Basic accuracy
± 1% of reading ± 1 digits.

Built-in printer 
Allows print the measured values. 

Built-in memory 
Capacity to store 50 records with 80 readings each. 

Thermal protection
Protects all sensitive components, avoiding any damage due to overheating. 

Advanced features 
Digital direct reading of very low resistances in the alphanumerical display, with up to 4½ digits. Very fast and accurate measurements.