Micro-electrolytic conductivity sensor driving circuit modification for variable supply current.
This project focuses on making a circuit that enables the characterization and calibration of the resistance temperature detectors (RTDs) within the micro electrolytic conductivity sensors. For calibrating the devices, voltage vs current plots at different temperatures need to be done. The new driver circuit needs to provide different levels of supply current to the RTDs. The schematics of the original driver circuit where studied and modifications to the circuit where made to achieve the objective. A voltage divider circuit was added to the voltage-to-current converter. In addition, the current resistor in the converter was replaced with a potentiometer allowing further tuning of the output. The circuit was simulated using PSPICE simulation software and the values for the resistors where calculated. Once built, the circuit was tested for proper response. A mock load was used for the testing. A linear and very accurate response was acquired from the circuit. The circuit was then packaged and available for use.
School:
University of Puerto Rico at Mayagüez
Department:
Electrical and Computer Engineering
Research Advisor:
Mark Shannon
Department of Research Advisor:
Mechanical Science and Engineering
Year of Publication:
2006