Reset of Integral Action Most of the processes we will be controlling will have a clearly defined setpoint. If we wish…
RATE OR DERIVATIVE ACTION Consider a control system subjected to a disturbance, which causes the error to increase in a ramped…
A thermocouple consists of two pieces of dissimilar metals with their ends joined together (by twisting, soldering or welding). When heat…
Every type of metal has a unique composition and has a different resistance to the flow of electrical current. This is…
Diaphragm Digital Control Valve is an electrically actuated, hydraulically operated multi-function control valve. It can be used for local as…
Level measurement systems that use differential pressure ΔP as the sensing method, are by their very nature affected by temperature and…
Drum Level Control Systems are used extensively throughout the process industries and the Utilities to control the level of boiling…
The Below Figure depicts the control scheme for single-element drum level control. In this configuration, only the water level in…
A two-element drum level control system is capable of providing close adherence of drum level to its set-point under steady-state…
In most drum level control applications, the two-element drum level control will maintain the required water/steam interface level – even…
