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TeLC1976
Dipl. Ing. A. Kutschelis & Sohn

Technische Lehrmittel Construktion
Hochstr. 8
D- 59425 Unna
Germany

web: http://www.telc.de
mail: mail@telc.de
phone.: +49 (0) 2303 239999
facs: +49 (0) 2303 239990
   
 
printable version Level- and flow control LFIC 2000
 
Prozessleittechnik LFIC 2000

"The Unit" to learn about two typical controlled members level & flow and to study the PID algorithms using original industrial components.

Prozessleittechnik LFIC 2000
 
Control modes:
  • 2-Position control switching pump on/off
  • 3-Position step control with slow motor valve
  • Continous control with speed controlled pump
  • Feed foreward
  • Cascade
 
Controlled members:
  • Waterlevel measured by bottom pressure
  • Waterflow measured by magnetic flow-meter
 

Controller:

Industrial controller or PLC
PC and TeLC software controller, special features when using PC and TeLC software controller: Time plots of I/O and of PID - actions of output value (Windows-software).

 
On-off control
Prozessleittechnik LFIC 2000
 
3-Position step control
Prozessleittechnik LFIC 2000
Y: calculated output action of PID-controller. Y3: Transformed step-output for slow motorvalve
 
Continous control
Prozessleittechnik LFIC 2000
Control of pump speed
Keywords: Process Trainer, Automatic Control, Controller Tuning, Plant Technology, Process Control, Level, Flow, Control, Automatic Control, Continuous Action Control,Compound Action Controller, Discontinuous Action Controller, Integral Controler,Differential Controller, Proportional Controller, PID Controller, Vaiable Feedback Controller
 
©TeLC Unna 2004 
   
 
printable version Interactive miniplant
 
Interactive miniplant
This mini plant combines the control of water flow, water level, water temperature and air pressure. The unit principle is similar to a steam generation and heat consumption process. Because of safety the heat generation indeed is a hot water generation. All elements are connected by PROFIBUS to an automation system.
 
Sensors:
  • Limit sensors
  • Capacitive level transmitter
  • Magnetic flow transmitter
  • Pt 100 temperature transmitter
  • Piezo-resistive pressur transmitter
 
Controlled members:
  • Pneumatic valves
  • Fast electric motor valves
  • 21 kW resistor water heater
 
Power control:
  • By boiler-temperatur
  • By mixing ratio of boiler- and bypass-wate
  • Flow-rate of used water
 

Control:

Discrete electronic controller and automation system

 

Technical details:

Dimensions:
2.9 m
Weight: 280 kg
Power supply: 380V AC 3~
Air supply: Compressed air
 
Interactive miniplant
Keywords: Process Trainer, Automatic Control, Controller Tuning, Plant Technology, Process Control, Level, Flow, Temperature, Ratio, Split Range, Feed foreward, Cascade control, Rationcascade Control, Control, Automatic Control, Continuous Action Control, Compound Action Controller, Discontinuous Action Controller, Integral Controler, Differential Controller, Proportional Controller, PID Controller, Vaiable Feedback Controller
 
©TeLC Unna 2004 
   
 
druckbare Version Miniplant FIRCA
 
FIRCA

Philosophy of TeLC Miniplants:

TeLC Miniplants follow a standardized design principle which adopts to some extent the real situation in an industrial plant.So is found the field department and the control department. Field and control are both equipped with original industrial instruments. The control department contains the mimetic display and the control instruments. Deviating from reality the field which is concentrated in the mimetic display is to be physically connected with the control instruments

may be with pneumatic hoses or electric wiring. So the trainee has got an additional task to solve. This connecting is eased in that way that especially for the wiring needs be taken no care with normal bipolar wiring and polarity. Connecting of pneumatics and electrics feels equal. The standardisation of the TeLC Miniplants goes so far as the dimensions height 1.95m and depth 0.65m are equal. Only width differs between 2.2 and 2.9 m and of course weight. Within the abbreviation naming of the units is indicated the control task and instrumentation so e.g. here FIRCA means: Flow - Indication - Registration - Control - Alarm
 
Wide range of Training Tasks:
  • identification of the process elements and their connection
  • put in action and calibration of elements
  • connection of the process with the control terminal
  • structurizing and configuration of transmitters and controllers
  • running of the process (start & stop )
  • study and optimize the control performance by adjusting the parameters
 
Built-up of FIRCA:
  • This Miniplant contains a complex circuitry using pneumatic and electric equipment.
  • The fluid flow (water) can take 2 possible ways:
    • The stronger pump drives the water into the blue pipeline through the magnetic F/I- transmitter , the controlvalve with positioner and linear characteristic, the alarm actuator and a rotameter back into the reservoir.
    • The second pump drives water into the red pipeline through an orifice plate with connected p/p-transmitter and the controlvalve without positioner but with logarithmic characteristic, a rotameter and a handvalve for disturbance back into the reservoir.
  • The flowlines can be run under constant pressure conditions which is regulated by the spill valve.
  • Both pumps can be connected in parallel to pump into the blue line.
  • Corresponding to the pneumatic and electric instrumentation p/I and I/p signal converters are existing in the field.
  • The ratio control is realized with the electronic controler used as master and the pneumatic one as slave.
  • The square root transfer of the pneumatic flow signal is realised with the electric controller.
  • length 2,9 m, weight 195 kg. supply 380 V AC and pressed air.
 
©TeLC Unna 2004 
   
 
printable version Miniplant LIRCA
 
LIRCA

Philosophy of TeLC Miniplants:

TeLC Miniplants follow a standardized design principle which adopts to some extent the real situation in an industrial plant.So is found the field department and the control department. Field and control are both equipped with original industrial instruments. The control department contains the mimetic display and the control instruments. Deviating from reality the field which is concentrated in the mimetic display is to be physically connected with the control instruments

may be with pneumatic hoses or electric wiring. So the trainee has got an additional task to solve. This connecting is eased in that way that especially for the wiring needs be taken no care with normal bipolar wiring and polarity. Connecting of pneumatics and electrics feels equal. The standardisation of the TeLC Miniplants goes so far as the dimensions hight 1.95m and depth 0.65m are equal. Only width differs between 2.2 and 2.9 m and of course weight. Within the abbreviation naming of the units is indicated the control task and instrumentation so e.g. here LIRCA means: Level - Indication - Registration - Control - Alarm
 
Wide range of Training Tasks:
  • identification of the process elements and their connectio
  • put in action and calibration of elements
  • connection of the process with the control terminal
  • structurizing and configuration of transmitters and controllers
  • running of the process (start & stop )
  • study and optimize the control performance by adjusting the parameters
 

Built-up of LIRCA:

The fluid flow is easy to ceive:
Water is pumped out of the reservoir through the magnetic flow transmitter and the control valve with positioner into the perspex vessel. The vessel is discharged by handvalve back into the reservoir again. The level L/p-transmitter is on gravity principle. The vessel can be pressurized by controlling two valves with positioners in split range connection. For operation with 3 pneumatic controllers a p/p transmitter and an I/p- converter are installed in the field.

By this configuration are created 3 dependant control loops: FIC, LIC and PIC. The pneumatic 3-pen recorder is for high speed registration. The alarm device is activated by the alarm actuator in the field. The delay units can be intermitted into every signal path. The pump delivery is variable through a bypass. Flow can also be restricted by a handvalve before the entry to the vessel. The control loops FIC and LIC can be connected in cascade with FIC as follower to improve control performance at upstream disturbances.

Width 2.9 m net weight 220 kg. services AC 3-phase and pressed air.

 
©TeLC Unna 2004 
   
 
printable version Pumps and Valves
 
Pumps and Valves

The unit is for the training of waterhydraulics which are used in house installations for heating and water supply.

Installations:

  • 3-stage centrifugal pump with frequency controlled speed.
  • heating circulating pump pressure controlled
  • heating circulating pump 4-stage speed controlled
  • parallel- and series connection
  • with/without system pressure (close/open system)
  • in cold or hot water (inbuilt heater )
 

Valves characteristics test:

  • straight- / inclined seat-, ball-, V-, release/reducer-, others (1 free duct)
 
Measuring:
  • pressures with 8-fold switch against a piezoresistive sensor of 0,1% accuracy
  • flow with magnetic flow meter
  • temperatures with pt100 resistors
 
Automatic Control:
  • with digital continous controller or PC
 
Terminal for PC connection:
  • provided for use with TeLC acquisition program.
 
Details:
  • rollable stand with dimensions 1.8m x 0.8m x 1.7m
  • weight 170kg
  • services 230V AC.
 
©TeLC Unna 2004 
   
 
printable version Miniplant TIRCA
 
TIRCA
Philosophy of TeLC Miniplants:

TeLC Miniplants follow a standardized design principle which adopts to some extent the real situation in an industrial plant.So is found the field department and the control department. Field and control are both equipped with original industrial instruments. The control department contains the mimetic display and the control instruments. Deviating from reality the field which is concentrated in the mimetic display is to be physically connected with the control instruments may be with pneumatic hoses or electric wiring. So the trainee has got an additional task to solve. This connecting is eased in that way that especially for the wiring needs be taken no care with normal bipolar wiring and polarity. Connecting of pneumatics and electrics feels

equal. The standardisation of the TeLC Miniplants goes so far as the dimensions hight 1.95m and depth 0.65m are equal. Only width differs between 1.8 and 2.9 m and of course weight. Within the abbreviation naming of the units is indicated the control task and instrumentation so e.g. here TIRCA means: Temp - Indication - Registration - Control - Alarm
 
 

Wide range of Training Tasks:

  • identification of the process elements and their connection
  • put in action and calibration of elements
  • connection of the process with the control terminal
  • structurizing and configuration of transmitters and controllers
  • running of the process (start & stop )
  • study and optimize the control performance by adjusting the parameters
 

Buildup of TIRCA:

TIRCA is a heat treating process. The furnace heats up to 1000 °C rather fast. The special isolation material efects a not too longtime accumulation of heat. The water basin down under the furnace is for cooling the piece of metal. The metalpiece and a pair of pliers belong to the equipment.

 
Electric power installations:
  • continous power regulator phase control
  • continous power regulator thyristor control
  • on/ off power regulator tyristor switch
  • variable transformer for the current supply disturbance
 
Controllers:
  • 2 digital continous controllers
  • 1 on/off controller with feedback
 
Registration and indication:
  • 3-pen recorder
  • voltmeters
  • temperature and current transmitter
 
Details:
  • width : 1,85 m weight: 230 kg optional on rollers
 
©TeLC Unna 2004 
   
 
printable version Miniplant PIRCA
 
PIRCA
Philosophy of TeLC Miniplants:

TeLC Miniplants follow a standardized design principle which adopts to some extent the real situation in an industrial plant.So is found the field department and the control department. Field and control are both equipped with original industrial instruments. The control department contains the mimetic display and the control instruments. Deviating from reality the field which is concentrated in the mimetic display is to be physically connected with the control instruments may be with pneumatic hoses or electric wiring. So the trainee has got an additional task to solve. This connecting is eased in that way that

especially for the wiring needs be taken no care with normal bipolar wiring and polarity. Connecting of pneumatics and electrics feels equal. The standardisation of the TeLC Miniplants goes so far as the dimensions hight 1.95m and depth 0.65m are equal. Only width differs between 2.2 and 2.9 m and of course weight. Within the abbreviation naming of the units is indicated the control task and instrumentation so e.g. here PIRCA means: Press - Indication - Registration - Control - Alarm
 
Wide range of Training Tasks:
  • identification of the process elements and their connection
  • put in action and calibration of elements
  • connection of the process with the control terminal
  • structurizing and configuration of transmitters and controllers
  • running of the process (start & stop )
  • study and optimize the control performance by adjusting the parameters
 

Buildup of PIRCA:

A digital electronic controller is to be connected to the pressure control loop. 2 lines can be activated for the control. The pneumatic control valves have different capacity. For interfacing are used the p/I-transmitter and I/p-converter. A system of needle valves with positionscales together with the 3 reservoirs allow the simulation of delays up to third capacity. For data logging an electric 3-pen recorder with variable paper speed is existing. The alarm device can be connected to the alarm actuator in the field.

 
Dimensions:
  • width 2.2 m weight 170 kg, services AC 1-phase and pressed air
 
©TeLC Unna 2004 
   
 
printable version Building Automation
 
Building Automation

Heatexchange water-air, Centrifugal Fan, centrifugal pump , Automatic Control, Building Automation, Accounting, PC-Data-acquisition

The unit is an Air Heater with Hot Water circuit . The temperature of which is controlled by on/off controller, continous quality c. and mixing c.

 
It carries different technical elements that grant multipurpose use:
  • speed controlled Radial Fan with measurement of torque, speed, airvolume flow, temperatures and pressures
  • Centrifugal 4-speed waterpump
  • measurement of waterflowrate, pressures and temperatures
  • Heat Consumption Meter for the accounting
  • Controller with RS485 communication terminal for PC connection incl.program for the remote dialogue with this c. (and 254 others in bus operation )
  • the controller is outdoortemperature conducted and outputs to the 3-way mixing valve to control the heating temperature
  • the outdoor temperature is simulated by potentiometer
  • PC data acquisition of all values with notebook PC and PCMCIA-slotcard provided.
 
rollable unit w. dimensions: 1.5x0.65x1.8m weight: 180 kg. services 230V AC
visit also Fan & Thermic teststand which is an extraction of this unit.
 
©TeLC Unna 2004 
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