The automatic portion of this water control circuit is presented in the top half ( PQRST) of the ladder diagram. ... Figure 16.7(a) shows that there is high-level and low-level monitoring as well as pressure control for the pressure tank and low-level monitoring of the storage tank. ... The operation of the pump is also governed by the low-level sensors on the pressure and storage tanks (LSL 102, and LSL 103).
|Title||:||Industrial Instrumentation & Control,2e|
|Author||:||S. K. Singh|
|Publisher||:||Tata McGraw-Hill Education - 2003-04-01|