Wyniki wyszukiwania - BazTech

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Walidacja a weryfikacja metody pomiarowej

Kołakowska D.

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

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2018

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Nr 59

91--92

PL

Procedury walidacji i weryfikacji laboratoriów badawczych powinny być zgodne z wymogami prawnymi ujętymi w normach. Każde laboratorium badawcze musi dołożyć starań, aby badania i pomiary były wykonywane rzetelnie, zgodnie z aktualnym stanem wiedzy. W artykule przedstawiono wymogi norm, które dane laboratorium powinno przestrzegać.

EN

There are many indicators of the "quality" of laboratory tests confirming the competence of laboratory staff as well as the technologies used. Validation is the process of monitoring a test, procedure or method. It proves that the laboratory controls the method and gives reliable results. Verification, whereas, is a one-off process, carried out to establish or confirm the expected performance of the test before applying it in the lab. Verification means checking the test in a given laboratory. The laboratory, while testing a given product, should be sure of the results obtained. Its duty is to confirm laboratory staff competences and ensure the recipient of the results that the measurements methods are appropriate. The use of welldescribed and tested methods does not automatically give a guarantee of obtaining reliable results. Therefore, the laboratory should control the quality of performed tests in order to be able to prove that it is able to meet the acceptance criteria described in the methods used by it.

2

Testowy mostek aktywny do pomiarów dużych rezystancji

Kołakowska D., Krawczyk K., Lisowski M.

Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej

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2017

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Nr 54

135--138

PL

W referacie przedstawiono analizę testowego mostka aktywnego złożonego z kalibratorów INMEL 7000 jako źródeł napięcia i elektrometru Keithley 6517B jako detektora stanu niezrównoważenia. Przedstawiono wstępne testy mostka. Zaprezentowano algorytmy pomiarowe, a także pomiary testowe. W wyniku testów stwierdzono, iż dla rezystancji rzędu MΩ i GΩ konieczne jest zastosowanie źródeł o lepszych parametrach.

EN

The most accurate high resistance measurements are carried out with bridge methods based on modified Wheatstone’a bridge with precision binary dividers or active arm bridge. These bridges allow precise measurements of resistance in the range from 103Ω to 1015 Ω. Resistance measurements above 100 MΩwith the highest precision can be done with active arm bridge. Research on such bridge has been taken in a few of the National Metrology Institutes, i.e. The National Institute of Standards and Technology (NIST) in the USA, Physikalisch-Technische Bundesanstalt (PTB). Also the authors of this paper develop such bridge as part of a research project. This bridge will be used in the resistance unit transfer system to calibrate (scale) high value standard resistors in relation to high resistance transfer devices.

3

The effective area of measurement electrode in volume resistivity and permittivity of solid dielectrics measurements

Kołakowska D., Lisowski M.

Measurement Automation Monitoring

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2015

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Vol. 61, No. 2

32--34

EN

The problems of determination of the effective area of the measurement electrode during the evaluation of volume resistivity and electrical permittivity based on measurements in three electrode system are discussed. The presented analysis shows that because of the inaccuracies of formulas given in the standards concerning the effective area of the measurement electrode, the calculation of the volume resistivity and electrical permittivity might be encumbered with errors. The values of these errors are presented graphically. It has been shown that the factor of the measurement electrode extension at the electrical permittivity measurements also depends on electrical permittivity.