Abstract: Provided is a plasma device for applying a cold atmospheric plasma to a surface to be treated, in particular on textiles, leather and/or plastic fibers. The plasma device includes a housing, a plasma source in the housing, and a voltage source in the housing for applying a voltage to the plasma source, wherein the plasma device is configured to enable activation of the plasma source and/Oor to selectively switch the plasma source on only if a distance between the plasma source and the surface to be treated is within a predetermined distance.

Abstract: The invention relates to a method for testing an electrode arrangement (1) for generating a non-thermal plasma, having the following steps: determining at least one power parameter which characterizes a plasma power of the electrode arrangement (1); comparing the at least one power parameter with at least one predetermined target parameter value, and obtaining a comparison result; assessing the functionality of the electrode arrangement (1) on the basis of the comparison result, and preferably selecting at least one action according to the comparison result.