GRAPHING TOOLS
In order to obtain the curve of the analytic process, the Amatrol's T-5554 includes a graphic display for different measurements. The main parameter used for the current project was the measurement of pH; however, it is not the only parameter that the equipment is able to measure.
In order to obtain the required graphs, the display must be set with specific characteristics which can be selected in the Main Menu, this menu contains several options that modify the appearance of the graph in terms of color, scale, type of curve and amount of curve, among others. The required configuration for the pH measurement was obtained from the Data Acquisition Manual of the Amatrol's T-5554 in pages 106 and 107.
It is important to mention that in the first attempts, the graphing tool was not showing any output values even when it was correctly configured, this was mainly because in order to obtain the desired display output it was necessary to add a 10 Ohm resistor module for the input channel, once this resistor was added, the graph showed in the display. The performance of the graphing tool can be observed in Video 3. Open Loop Control System for the Amatrol's T-5554 in the Open-Loop tab.
Figure 30 shows the display of the graphing tool during one of the tests performed, in the mentioned figure it can be observed the menu button where the configuration of the display is performed; the screen button is used for amplifying or decreasing the speed of the curve's measurement in order to zoom in or out the visibility of the graph.
Figure 30. Graph tool display
Instituto Tecnológico de Estudios Superiores de Monterrey Campus Estado de México.