Description; Operating Principle - TENTECH MPK-254 Manual De Uso

1. Description

The MPK-254 micro-ohmmeter is a portable, microprocessor controlled
instrument, used to accurately measure very low contact resistances of
breakers and switches, busbars, transformers and engines windings, etc,
with test currents from 1 mA to 5 A.
Kelvin architecture (four-terminal method).
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Digital reading, alphanumeric display.
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Up to 4½ digits readings.
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Powered by rechargeable battery.
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1 µ resolution.
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200 maximum reading.
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1.1. Operating principle

This device uses the Kelvin Bridge architecture, with four terminals,
avoiding testing leads resistance to cause error during measurement. The
operator may choose test current and the reading is obtained by
comparison through internal high-stability standards. The result appears
in the alphanumeric display that is very easy to read.
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