SSR20240409B01 Pressure control unit Technical Training Equipment

SSR20240409B01 Pressure control unit Technical Training Equipment

Description

This 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 standardised 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

Specification

[1] trainer for control engineering experiments

[2] pressure control process, equipped with standard industrial components

[3] pressure measurement by pressure sensor

[4] generation of disturbance variables by drain valve

[5] 2 pressure tanks with pressure relief valve and manometer for direct observation of the tank pressure

[6] valves permit investigation of a 1st order controlled system (1 tank) or 2nd order controlled system (2 in-line tanks)

[7] pneumatically operated control valve with electro-pneumatic positioner

[8] digital controller, parameterisable as a P, PI or PID controller

[9] 2-channel line recorder

[10] process variables X and Y accessible as analogue signals via lab jacks

Technical Data

2 pressure tanks

– capacity: each 10L

– max. 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

1 Pressure controlled by proportionally varying pump speed (Inflow Control)

2 Pressure controlled by time-proportionally opening of a solenoid valve (Outflow Control)

3 * Direct control or Indirect control using an external controller:

* PID Controller

* PLC Controller