Loading-effects reduction using a voltmeter in series and an ammeter in parallel
This article proposes a method for reducing the loading effects when a dc voltage or current is measured in a linear circuit with a digital multimeter (DMM). In the proposed method, the voltmeter is placed in series to estimate the current, and the ammeter is placed in parallel to estimate the volta...
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/381676 |
| Acceso en línea: | https://hdl.handle.net/2117/381676 https://dx.doi.org/10.1109/TIM.2022.3193174 |
| Access Level: | acceso abierto |
| Palabra clave: | Electronic circuits Voltage measurement Electrical resistance measurement Current measurement Resistance Measurement uncertainty Loading Circuits elèctrics lineals Àrees temàtiques de la UPC::Enginyeria electrònica::Circuits electrònics |
| Sumario: | This article proposes a method for reducing the loading effects when a dc voltage or current is measured in a linear circuit with a digital multimeter (DMM). In the proposed method, the voltmeter is placed in series to estimate the current, and the ammeter is placed in parallel to estimate the voltage, which is the opposite of the conventional approach. Its application is particularly of interest when the equivalent resistance between the nodes of the dc voltage (current) under measurement is high (low). In comparison with the conventional method, the relative error is up to a factor of 10 4 lower if the equivalent resistance equals the shunt (input) resistance of the DMM when a dc current (voltage) is measured |
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