An electronic device and a fixing module are provided. A means of mounting, which may be an adjustable clamp, permits the base assembly to be connected to a seat post or other mounting point on a bicycle or other vehicle. An instrumentation module is contained in the housing and is coupled to the current sensors and the voltage leads, the instrumentation module being adapted and configured to record voltage and current measurements from the current sensors and voltage leads. Therefore, each vapor deposition process can be accurately controlled according to the refractive index of a thin film even if repeated vapor deposition processes change the refractive index. Of course, other claims and combinations are provided as well. A jet system may clean the surface with fluid after degradation.