Voltage coefficient of high-ohmic mox type resistors

• Autorzy: Kłos Z. , Krysiak J.
• Języki publikacji: EN

Abstrakty

EN

MOX-type high-ohmic precise resistors are used both in highest resistance standards and in structures of pico-ammeters and mega-ohmmeters with highest measuring ranges. The parameters of applied resistors decides about instrument's accuracy class, available measuring ranges and also have influence on measurement results stabilization time. High-ohmic resistors, especially those with highest resistance values, show considerable voltage unstablility. Larger when forcing voltages are lower. One of the most important parameters of precise high-ohmic resistors besides quality of work tolerance, temperature coefficient (TCR) and noise tension is VCR - the Voltage Coefficient of Resistance. This coefficient is given by the producers usually for voltages higher than 10 V [1]. Therefore when there occurs a need of high-ohmic resistor use for different working voltage an resistance vs. voltagemeasurement R=f(U) has to be made. The article shows obtained up to now results of MOX high-ohmic resistors voltage coefficients examinations in wide range (1-1000) V. The method of obtaining VCR presented in this article can be applied also for determination of MOX high-ohmic resistors parameters in the lowest working voltages.

Słowa kluczowe

EN

voltage coefficient of resistance; high ohmic MOX resistors

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
• Rocznik: 2009
• Tom: Vol. 63, nr 29
• Strony: 487--500
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Kłos Z.

autor

Krysiak J.

• Wroclaw University of Technology, Institute of Electrical Machines, Drives and Measurements, 19 Smoluchowskiego, 50-372 Wroclaw,

Bibliografia

• [1] KŁOS Z.: Problematyka wzorcowania aparatury elektrometrycznej. Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław, 2004.
• [2] KŁOS Z., KRYSIAK J.: Factors limiting extremely sensitive measuring ranges of contemporary picoammeters. Metrology and Measurement Systems, vol. XIV, No. 4, pp. 603-633, 2007.
• [3] KŁOS Z.: Pomiary elektrometryczne, WKŁ, Warszawa, 2008.
• [4] KOSSAKOWSKI J.: Elementy dyskretne RC. Wydawnictwo Ministerstwa Obrony Narodowej, Warszawa, 1979.
• [5] Low Level Measurements Handbook – Precision DC Current, Voltage and Resistance Measurements, 6th Ed. KEITHLEY Instruments, Inc., USA 2004.
• [6] KŁOS Z., MADEJ P.: Elektroniczny megaomomierz analogowy typ EMA-1. Pomiary Automatyka Kontrola, 1, ss. 3-5, 1994.
• [7] KEITHLEY, Model 6514 System Electrometer Instruction Manual, Keithley Instruments, Inc., USA 2004.
• [8] KŁOS Z.: Wysokoomowe rezystory precyzyjne stosowane w elektrometrii, Normalizacja, 7, ss. 12-15, 1992.
• [9] Ohmite Manufacturing Company, Mini-Mox Resistors Catalogue, 2007.