Determining the Temperature Coefficient of Reference Resistors
| Autor: | V. Žužek, Jovan Bojkovski, V. Batagelj |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Wheatstone bridge Materials science Condensed matter physics 020208 electrical & electronic engineering Thermistor 02 engineering and technology Atmospheric temperature range Type (model theory) Condensed Matter Physics 01 natural sciences Stationary point law.invention Electrical resistance and conductance law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Resistor Temperature coefficient |
| Zdroj: | International Journal of Thermophysics. 38 |
| ISSN: | 1572-9567 0195-928X |
| Popis: | The influence of temperature on electrical resistance of standard resistors is presented within this paper. Electrical resistance is like any other quantity temperature dependent. This dependence is specified with the temperature coefficient, which gives the relative change of resistance with temperature. The level of resistance change is not linear as it changes with temperature, and therefore the coefficient is temperature dependent as well. At a certain temperature, its value is equal to zero—the stationary point. Use of the standard resistor at this exact temperature or in a narrow interval around it greatly reduces the influence of temperature on electrical resistance, even if the thermal conditions are not optimal. Measurements of temperature coefficient were taken on a group of standard resistors of the same type in a wide temperature range, and the temperature of the stationary point was determined. Measurements were taken by placing the resistors in an oil bath and changing its set point temperature from 18 $${^{\circ }}\hbox {C}$$ to 38 $${^{\circ }}\hbox {C}$$ . Electrical resistance of each resistor was measured using a resistance bridge, which had its reference resistor placed in a separate thermal enclosure at a constant temperature. |
| Databáze: | OpenAIRE |
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