Wet Bench Continuous Temperature Measurement

Abstract

This thesis focuses on building an external temperature monitoring system to track the temperature of wet bench process equipment at Murata Electronics Oy. The goal was to implement a system capable of taking measurements continuously and store the taken measurement results in an easily accessible manner.

This project focused on researching available options for how to implement a system containing all the necessary requirements while keeping the system as simple as possible and viable within the allocated budget. Primarily research was focused on comparing different methods of measuring PT100 RTD sensors and how to transmit the measurement results to a microcontroller.

Based on the results of the research into different options, the general layout of the system was decided on. The project then focused on programming the microcontroller to handle receiving measurement results, implementing a method for adjusting offsets and sending data to a SQL database among other smaller features. This report details the process for how the final system layout was decided on and how each section of the microcontrollers program functions to accomplish the necessary tasks.

As a result of the project, Murata Electronics Oy gained a system capable of tracking the wet benches temperature variation over extended periods of time and gathering the data into a database. The system did not manage to flawlessly fulfil every desired function, but it accomplished the primary goal of the project, while laying the groundwork for future additions and improvements.