Method and welding device for carrying out a multiple welding method

A welding device for carrying out a multiple welding method, the welding device comprising:

• at least two electrodes, wherein each of the at least two electrodes has its own welding current circuit and each of the at least two electrodes has a control unit, which is provided in the welding device,
• the at least two control units being configured to control the welding current circuits of the at least two electrodes in order to carry out a welding process with each of the at least two electrodes on a workpiece,
• wherein a control unit of at least one electrode of the at least two electrodes is configured to apply a test parameter to the welding current circuit of the at least one electrode before a start or after an end of the multiple welding method and
• wherein a control unit of at least one other of the at least two electrodes is provided to record at least one electrical welding parameter in the welding current circuit of the at least one other electrode, and
• wherein, one of:
• the welding device is configured to detect an electrically conductive connection between the at least two welding current circuits when the recorded welding parameter is influenced by the test parameter and a specified test criterion is fulfilled or
• the control units of the at least two electrodes are each configured to record at least one electrical welding parameter in their welding current circuit during the multiple welding method and the welding device is configured to detect an electrically conductive connection between the at least two welding current circuits when the recorded welding parameters change simultaneously.