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This paper presents methods of photovoltaic panel inspection in the field. The aim is to verify value of on-site tests. The basic parameters for comparing the quality of photovoltaic panels are indicated by the manufacturer’s datasheet. Diagnostic in the field commonly uses a combination of different analyzers and infrared cameras. The paper compares the evaluation of the parameters at different climatic conditions by special photovoltaic analyzer, conventional analyzer with recalculation according the IEC standards and flash tester. The comparison of different methods and analyzers has been performed with the practical experience from the measurements. Further, the standards for the inspection of photovoltaic panels and best practices for their implementation are described.
The paper presents the elements of the principles of diagnosing the technical condition of turbogenerators. The problem was examined in terms of methodology based on the types of sensors and their distribution structure and principles of analysis of symptoms of the technical condition of machines. We postulate to increase the diagnostic instrumentation of the turbogenerator and to determine the basic characteristics and measurement of diagnostic signals. The work also discusses the basic patterns of diagnostic signals and proposes general dependencies of transformation and evaluation of these signals. The aim of this approach is to increase the unambiguity, sensitivity, informativity and multidimensionality of the condition symptoms.[b]Keywords[/b]: diagnostic, turbogenerator, monitoring, symptoms, sensors