The ”LabTek” Trainer provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of pressure control.
The air pressure control system is a 2nd order system. It comprises two in-line pressure tanks interconnected by a flow control valve. An additional valve on the second tank makes air tapping possible and so can be used to simulate a disturbance variable. A pressure sensor measures the pressure in the second vessel. The controller used is a state-of-the-art digital industrial controller. The actuator in the loop is a pneumatically operated control valve with a standardized current signal input. The controlled variable X and the manipulating variable Y are plotted directly on an integrated 2-channel line recorder. Alternatively, the variables can be tapped as analogue signals at lab jacks on the switch cabinet. This enables external recording equipment, such as an oscilloscope or a flatbed plotter, to be connected.
FEATURES
Experimental introduction to control engineering using an example of pressure control
Construction of the system with components commonly used in industry
Digital controller with freely selectable parameters: P, I, D and all combinations
SPECIFICATION
2 pressure tanks
Capacity: each 10L
Pressure: 10bar
Operating pressure: 6bar
Pressure sensor: 0…6bar Pneumatically operated control valve
Connecting flanges: DN15
Kvs: 0,1m3/h
Reference variable: 4…20mA
Stroke: 15mm
Characteristic curve equal-percentage
Line recorder
2x 4…20mA
Feed rate 0…7200mm/h, stepped
Controller
Process variables X, Y as analogue signals: 4…20mA