The Trainer provides a comprehensive experimental introduction to the fundamentals of control engineering using an example of level control.
A pump delivers water from a storage tank to the transparent level-controlled tank. The liquid level is measured by a pressure transducer installed at the base of the level-controlled tank. The controller used is a state-of-the-art digital industrial controller. The actuator in the control loop is a pneumatically operated control valve with an electro-pneumatic positioner. A ball valve in the outlet line enables defined disturbance variables to be generated. 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.
Process control software is optionally available.
FEATURES:
•    Experimental introduction to control engineering using an example of level control
•    Construction of the system with components commonly used in industry
•    Digital controller with freely selectable parameters: P, I, D and all combinations
•    Level measurement by pressure sensor
 
SPECIFICATION:
Storage tank: 30L
Centrifugal pump
•    Power consumption: 250W
•    Flow rate: 150L/min
•    Head: 7m
•    Speed: 2800min-1
Level-controlled tank
•    7L
•    Level: 0…0,6m
Pressure sensor: 0…100mbar
Pneumatically operated control valve DN 20
•    Kvs: 4,0m3/h
•    Reference variable: 4…20mA
•    Nominal 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
•    Power required for operation
230V, 50Hz, 1 phase
230V, 60Hz, 1 phase