A coating apparatus includes a first coating element, a second coating element, an isolating element, at least one isolating block, and at least one linear driving element. A second clock generator circuit has a second voltage supply for generating a second signal of a second frequency or of a second frequency range, such that the second frequency or a mean value of the second frequency range is lower than the first frequency. The method uses the independent positioning device to measure the position of the mobile terminal at one or more first locations. The pressure regulators and flow orifices are provided to regulate the hydrogen pressure and to minimize the fluctuation in pressure of the hydrogen received by the fuel cell.