WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 14, 2019
Traceability Chain for the Improvement of the Attenuation High Frequency
Authors: ,
Abstract: The ISO/CEI 17025 standard requires to validate the testing and analytical methods when they are standardized or after amplification or modification of these methods. A measurement uncertainty must also be associated with the results. Metrology is the science of measurement associated with the evaluation of uncertainty. The metrologist is interested in the quality of measurements and in particular to two factors. The first of these factors is to ensure that the measurement is connected to reference standards. The second factor in the quality of the measurement is the calculation of uncertainty. To evaluate the sources of measurement uncertainty, the so-called 5M method is commonly used (Manpower, Machines, Materials, Methods, Management); In High Frequency metrology, all measurement devices are linked to a standard. In High Frequency attenuation, there are no physical standards in this area for most of the national metrology laboratories. Thus, a large number of theoretical measurement methods are adopted for the attenuators calibration. Thus, this paper improves the feasibility of a developed method HF attenuation, called Power variation, realized within the laboratory of electrical metrology DEF-NAT in close collaboration with Computer Laboratory for Industrial Systems LISI to ensure traceability to the International System of Units SI according as the requirements of ISO/CEI 17025. The obtained results by the adopted method are compared against to those of the traceable Intermediate Frequency method for fixed and variable attenuators to prove the chain of metrological traceability according to the attenuation parameter.
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Keywords: Fixed attenuation, Variable attenuation, Intermediate Frequency, Bolometric Bridge, power sensor, Power Variation
Pages: 213-219
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 14, 2019, Art. #27