Laboratory Virtual Instrument Engineering Workbench Lab Report

LabVIEW (Laboratory Virtual Instrument Engineering Workbench), created by National Instruments is a graphical programming language that uses icons instead of lines of text to create applications. A LabVIEW program consists of one or more virtual instruments (VIs), Virtual instruments are called such because their appearance and operation often imitate actual physical instruments. The objective of developing a virtual interface that acquires data from physical instrument (pH probe) used in the monitoring of a chemical process (in our case an acid base titration and a saponification reaction). The acquired data is processed offline and analyzed for further calculations.
Key Words: -Virtual interface, Saponification Reaction, pH probe, etc.

I. INTRODUCTION

A LabVIEW program consists of one or more virtual instruments (VIs). Virtual instruments are called such because their appearance
The first experiment performed was a simple acid–base titration using oxalic acid and KOH. The experiment was performed so as to check the feasibility of the idea behind the development of automated system for the measurement of pH and to have enough confidence in performing future experiments and also to check the response of the interface towards the pH change. Calibration was performed before the start of the each experiment so as to calibrate the LabVIEW program against the value of mV generated by the probe per value of pH. After the end of the experiments, the observed changes in the value of pH during the experiment are plotted against time. The graph is shown in figure 9.1.The system shows to perform well in both sensing of the pH and exporting of the data to the excel sheet and no unforeseen condition were observed such as data mismatching and error in read and write value which can lead to stopping of the