Span is defined as:
a. enhances controller output by increasing the output in relationship to the changing process variable.
b. the difference ? between the upper and lower range limits.
c. is designed to reduce the difference between the set point and process variable by adjusting the controllers output continuously until the offset is eliminated
d. the portion of the process controlled by the controller
Answer: b
You might also like to view...
Motors are the most important loads in any heating, cooling, or refrigeration system.
Answer the following statement true (T) or false (F)
A common tool used to mark a straight line on a board, wall, ceiling or floor is _____
a. chalk line c. marking gauge b. pencil d. pen
The first written records describing electrical behavior were made ____ years ago.
a. 100 b. 500 c. 1,200 d. 2,500
Determine the estimated cost for the heating system for the residence shown in Figure 20.5. A subcontractor has given you a cost of $1,900 for the heating unit and a cost of $195 per register, which includes the ductwork from the heating unit to the register. A register is required in each of the rooms. Rooms over 150 square feet require one register per 150 square feet or fraction thereof.
What will be an ideal response?