Der bedea-Meßplatz "Mikrofoniespannung" ermöglicht die Messung der piezoelektrischen und triboelektrischen Eigenschaften von Kabeln in Anlehnung an IEC 46A/349/FDIS "Admedment to IEC 61196-1: Addition of Clause 12.5 - Test for low frequency mechanically induced microphony in coaxial cables".
Das Meßverfahren gewährleistet eine definierte und kontrollierte Anregung des Meßobjekts und eine gute Reproduzierbarkeit der Messungen.
Cables which are subjected to mechanical stresses such as shock, pulling force, physical pressure or torsion generate electrical charges noticeable as disturbing currents or disturbing voltages on the cable. These disturbances called "mechanically induced noises" or "cable microphony" are superimposed to the signals which the cable is carrying. They become significant in the case of low level signals in the µV or µA range. In case of measuring-, controlling-, monitoring- or audio applications, the used cables should be optimized with regard to their microphony behaviour.
bedea´s test set-up allows to measure the cable microphony charge level in accordance with the International Standard IEC 61196-1, Amendment 1, clause 12.5.
The advantage of the new measuring procedure is the exactly defined and controlled excitation of the cable sample under test and the good reproducibility of the measuring results.
