Measuring method for determining measuring resistance, involves leading current by measuring resistance, detecting potential at connection of measuring resistance, and changing current around changing current value

摘要

The measuring method involves leading a current by a measuring resistance (10), detecting a potential at a connection of the measuring resistance, and changing the current around changing current value. Another potential is detected at the connection of the measuring resistance. A potential difference is determined between the former potential and the latter potential. The resistance value is determined by calculating ratio of the potential difference to the changing current value. An independent claim is also included for a test circuit, which has a voltage source that is connected with ameasuring resistance.