Patent ID: 7358716

Claim:
A measuring method for measuring currents with a large dynamic range by means of a magnetic measuring module that comprises a magnetic core with at least one compensation coil surrounding said core, an air gap, and a core opening, wherein a magnetic field probe is arranged in the air gap and a primary conductor conducting the current which is to be measured is guided through the core opening, the method comprising the following steps: Switching into a high-current mode when a current threshold value is exceeded, and switching into a low-current mode otherwise, wherein the low-current mode comprises the following steps: Feeding a first current pulse to the compensation coil, which drives the magnetic core in a first direction until magnetic saturation occurs, Measuring a first primary current value I 1 after the current pulse is disconnected, Feeding a second current pulse to the compensation coil, which drives the magnetic core in a counter second direction until magnetic saturation occurs, Measuring a second primary current value I 2 after the second current pulse is disconnected, and Determining the corrected primary current value subsequently as an average value I=(I 1 +I 2 )/2 from the first and the second primary current values I 1 , I 2 .