What might be some examples of situations why we might select one mode over another? What are some of the factors that we should consider when selecting a control mode? ...
The on-off control method is the least expensive closed loop system to use due to its simplicity. The on-off control method does however tend to cause more wear on its equipment due to the excessive amount of on-off cycles. It is also the hardest...
RTDs are more accurate and reliable than thermocouples. You should also understand that RTD's sensing element is a resistor that changes resistance with temperature and it is connected to the control circuitry through a wire. Answer the following: In order to...
In this week of Industrial Automated Systems we discuss process controls that utilize variables and controlled set-points. The following topics are part of this system: On-Off Control mode is as the name implies in that the process control is automated to turn a system...
Abstract A brief description of the experiment. The abstract should not exceed four or five sentences. Introduction In your own words, explain the reason for performing the experiment and give a concise summary of the theory involved, including any mathematical detail relevant to later...
Describe the difference between an INNER JOIN, a RIGHT JOIN, and a LEFT JOIN. Provide a business example where you would want to use each type of join. ...
Depending on the controlled variable and how fast or slow it changes, every control system must have a controller that provides a signal to the final control element. Keep in mind that the controller is the decision maker that sends a signal to a final...
What is the importance of using P&ID for process engineering? I currently work at Georgia Pacific in wood products, we make OSB. I have worked as an electrician on shift for several years which meant that there were several...
What are some of the effects that power quality might play in the selection of different devices? For example, power supplies may be subject to transients, harmonics, variations in voltage and (sometimes) frequency and so forth. Also, what about temperature variations, vibration, dust, and other...
Thyristors are semiconductors that are, essentially control systems for switching and controlling power. The ones used most are Silicon-Controlled Rectifiers (SCRs), Diode AC Switches (Diacs), Triode AC Switches (Triacs), and Uni-Junction Transistors (UJTs). Here's a breakdown of each one and how they function: ...