The AMATROL Process Control Level and Flow Learning System (T5552) does not have graphing tools included in its design, therefore they could not be tested. Instead the display it has will be briefly describedand a test will be explained to see its behavior. The oscilloscope was not used either because it is not clear what kind of lectures or measurements could be obtained when using it. As well, it was not clear how the process-oscilloscope connections had to be done.
This workstation had a display instead of a graphing . This display is used to show characteristics of the process as the water level , although there are several other ways to measure it. It is also used to calibrate how data and electrical signals from the computer are interpreted. By properly calibrating the display, the more accurate readings will be obtained.
While some older process meters have an analog display (scale and pointer), most of today's process meters have a digital display. Process meters can be programmed to display either the actual value of the input signal, a percentage of the input signal, or most commonly, the physical units of the process variable that the input signal represents. Below you will find a video where it is shown an application of the display; which is to show the input of the process in physical units.