Electronic system for experimentation in ac electrogravimetry II : implemented design

RESUMEN: A detailed description of the electronic system designed to improve the measurements in an experimental AC electrogravimetry setup is presented. This system is committed to acquire appropriated data for determining the Electrogravimetric Transfer Function (EGTF) and provide information regarding the mass transfer in an electrochemical cell in the AC Electrogravimetry Technique, but maintaining a good trade-off between the locking frequency bandwidth and the resolution in the frequency tracking, that is, enlarging the bandwidth of the system to follow signals with frequency as higher as 1 kHz, but maintaining an accurate and continuous tracking of this signal. The enlarged bandwidth allows the study of fast kinetic process in electrochemical applications and the continuous tracking let to achieve a precise measurement with good resolution rather than average frequency records obtained by conventional frequency meters. The system is based on an Analogue-Digital Phase Locked Loop (A-D PLL).

• Autores: Torres Villa, Róbinson Alberto; Arnau Vives, Antonio; Perrot, Hubert; Aedo Cobo, José Edinson
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2007
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/27001
• Acceso en línea: http://hdl.handle.net/10495/27001; https://revistas.eia.edu.co/index.php/reveia/article/view/171
• Palabra clave: AC electrogravimetry; Quartz crystal microbalance; Phase locked loops; Bandwidthresolution trade-off; Coarse and fine tuning; Electrogravimetría AC; Bucles de enganche de fase; Microbalanza de cristal de cuarzo; Compromiso ancho de banda-resolución; Ajuste grueso y fino
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/