AUTHORS: Nadia Fezai, Abdessattar Ben Amor

Download as PDF

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.

KEYWORDS: Fixed attenuation, Variable attenuation, Intermediate Frequency, Bolometric Bridge, power sensor, Power Variation

REFERENCES:

[1] D.Allal et B.Mellouet, “Traçabilité au SI des mesures effectuées a l’aide d’analyseurs de réseaux vectoriels ”, 13ème Congrès International de Métrologie, Lille, 18-21 juin 2007, Paris.

[2] M. désenfant et M. Priel, Cédric Rivier, “ De la validation des méthodes d’analyse a l’évaluation de l’incertitude des résultats de mesure ”, BNM-LNE, Paris.

[3] ISO / TS, “Guide to the use of repeatability, reproducibility and trueness estimates in measurement calibration”, 2004.

[4] ISO / TS, “Guide to the use of repeatability, reproducibility and trueness estimates in measurement calibration”, 2004.

[5] NF X 07-001, “Normes fondamentales - Vocabulaire international des termes fondamentaux et généraux de métrologie“, (VIM), AFNOR, 2012.

[6] NF EN ISO/CEI 17043, “ Evaluation de la conformité – Exigences générales concernant les essais d’aptitude “, Avril2010, AFNOR.

[7] NF EN ISO/CEI 17025, “ Exigences générales concernant les compétences des laboratoires d’étalonnages et d’essais “, nov 2017, AFNOR.

[8] A .Kazemipour, “ nouvel étalon primaire de puissance HF, DC-26.5GHz “, JNM, 2003.

[9] S. Seghier et N. Benahmed, “ Analyse et conception d’un coupleur coaxial rectangulaire à conducteurs internes circulaires par la méthode des éléments finis “, SCIENCE 02(3) (2006), pp : 300 – 313.

[10] EA-4/02, « Expression of uncertainty of measurement in calibration», European cooperation for Accreditation, 2004.

[11] EA-4/16, « Lignes directrices d’EA pour l’expression de l’incertitude des résultats d’essais quantitatifs », European co-operation for Accreditation, Avril 2004.

[12] S. M. Abd-Elazim, and E. S. Ali, “Optimal Power System Stabilizers Design for Multimachine Power System Using Hybrid BFOA-PSO Approach”, Int. J. of WSEAS Transactions on Power Systems, Vol. 8, No. 2, April 2013, pp. 85-94.

[13] S. M. Abd-Elazim, and E. S. Ali, “Synergy of Particle Swarm Optimization and Bacterial Foraging for TCSC Damping Controller Design”, Int. J. of WSEAS Transactions on Power Systems, Vol. 8, No. 2, April 2013, pp. 74-84.

[14] E. S. Ali, and S. M. Abd-Elazim, “Power System Stability Enhancement via Bacteria Foraging Optimization Algorithm”, Int. Arabian Journal for Science and Engineering (AJSE), Vol. 38, No.3, March2013, pp.599-611.

[15] K.Wong, “Traceability of vector network analyzer measurements”, IEEE Xplore, 9-12 Dec.2008,pp.157-167.

[16] A.Widarta, H. Iida and T. Kawakami “AttenuationMeasurement System in the Frequency Range of 18– 40 GHz”, IEEE Transactions on Instrumentation And Measurement, VOL. 56, NO. 2, APRIL 2007.

[17] N. Ridler1, R. Clarke2, M. Salter1 and A. Wilson1 “Traceability to national standards for S-parameter measurements in waveguide at frequencies from 220 GHz to 330 GHz”, IEEE Xplore, 1-2 Dec. 2011, pp.

[18] N. Fezai, Abdessattar Ben Amor “Traceability and Calibration Techniques for Vector-NetworkAnalyzer,” 2018 International Conference on Advanced Systems and Electric Technologies (IC_ASET 2018), 978-1-5386-4449- 2/18/$31.00 ©2018 IEEE., pp. 127-131

[19] N. Fezai, Abdessattar Ben Amor “Measure of Reflection Factor S11 High Frequency,” 2017 International Conference on Advanced Systems and Electric Technologies (IC_ASET 2017), 978-1-5090-6634-6/17/$31.00 ©2017 IEEE, pp. 384-388.

[20] N. Fezai, Abdessattar Ben Amor “Measures of attenuation High Frequency: Application to variable attenuators,” The 7th International Conference on Modelling, Identification and Control Sousse - Tunisia, December 18-20, 2015.

[21] N. Fezai, Abdessattar Ben Amor, “Traceability of high frequency attenuation measures,” CESA2015:6th-Multi-Conference on Computational Engineering in Systems Applications Cesa2015. March 24-26, 2015, Marrakech, Morocco.2015.

[22] N. Fezai, Abdessattar Ben Amor “Measure of Reflection Factor High Frequency ‘Reflectometer Method’,” European Journal of Scientific Research, ISSN 1450-216X / 1450-202X Vol. 143 No 3 December, 2016, pp.265-272

[23] N. Fezai, Abdessattar Ben Amor “On the improvement of the High Frequency traceability chain: application to attenuators,” WSEAS Transactions on Circuits and Systems, ISSN / EISSN: 1109-2734 / 2224-266X, Volume 14, 2015, Art. #34, pp. 295-303.