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ITEM : TEMPERATURE PROCESS CONTROL TRAINERMODEL : LDA-TPC-A

This training system provides a comprehensive experimental of two loop system process control using water asthe process fluid in a temperature control system. The system comprises primary and secondary water circuits.2 loop control system is implemented using water temperature in primary and secondary circuit as the processvariable (PV). In the secondary circuit fresh water is heated up by warm water through a heat exchanger. 4temperatures measurement points are used to monitor the inlet and outlet of the primary and secondary watercircuit of the heat exchanger. The primary and secondary water flow also monitored by pulse flow transmittertype of flow sensor. The fresh water outlet temperature in the secondary circuit is regulated by changing theflow rate of warm water in the primary circuit. The primary circuit comprises an electrically heated tank, apump and a 3-Way motorized proportional valve as the control valve. The secondary circuit contains a forcedair cooling heat exchanger.

The Process Controller used in the process control trainer is microprocessor based and is easily configured bythe user to provide a range of control functions from 2-state control to 3-term PID control. It also features localcontrol or remote control with PC control software. Set-point and process variables can be analyzed, adjustedand monitored from the PC Screen during the controlled process loop to get the optimum performance. The Pvariable, I variable, D variable, controlled output level and the set point level are also displayed on the LCDdisplays of the controllers for easy monitoring. Setting of Proportional, Integral, Derivative, Set Point valuesare done from the control panel section of the PID controller. Setting of Set Point and Hysteresis are done fromthe control panel section of the ON/OFF controller. The control variable X (Output level) and the manipulatingvariable Y (Time stamped) and Set Point level is recorded in the DAQ system that can be used to plot theprocess variables.

FEATURESAll components in the system are commonly used in industry and are systematically installed on a powdercoated steel bench. The system uses an electronic pulse flow transmitter type of water flow sensor andtemperature sensors to monitor the water temperature in the primary and secondary circuits. On/Offproportional controller and PID controllers are used in the system for closed loop control experiments. Water iscirculated in primary circuit using water pump through motorized 3-Way proportional valve. Generation ofdisturbance variables by manual valves to change the flow rate in primary and secondary circuits. Teachesstudents to do PID parameter setting for optimum performance as well as other practical aspects in achievingstable system in a real process control system. Familiarization of process control software and DAQ system aswell as transducers calibration in Data Acquisition process. The well-structured instructional material outlinesthe technological fundamentals and provides a step-by-step guide through the experiments.

LDA-TPC-A with optional

item : LDA-TPC-1

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COMPONENTS AND SYSTEMS INCLUDED:

Water pump, heated water tank, forced air cooling heat exchanger, water inline filter, 2 electronic water flowmeters (pulse flow transmitter), 4 temperature sensors, motorized 3-way proportional valve, manual valves,On/Off controller with LCD display, set-point and hysteresis adjuster knobs, PID Controller with LCD display,Proportional Integral Derivative values adjuster knob, water flow rate digital display, temperature reading

digital display, proportioning valve adjuster, main ON/OFF switch and protection ELCB.

EDUCATIONAL OBJECTIVES:

Introduction to the fundamentals of process control (open loop, close loop, control response). Familiarization with industrial process control components (controllers, transducers, actuators). Implementation of controlled variable in a open loop and manual control system. Implementation of controlled variable in a closed loop control system. Application of On/Off controller in single loop controlled system. Investigation of disturbance and control response. Application P, PI and PID control in single loop controlled system. Influence of different control parameters (P, I and D) on stability and control quality. Tuning of PID controller. Implementation of dual loop control.

Application of cascade control (temperature and flow) Processing of process variables using data acquisition (DAQ). Using computer for process control monitoring and analysis (SCADA).

Process Schematic On/Off Control Loop 1

On/Off Control Loop 2 PID Control

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ACCESSORIES:

Experiment Manual. Computer software for DAQ, monitoring and control (SCADA)

OPTIONAL ITEMS:LDA-TPC-1: Water source tank with forced air cooling heat exchanger and water pump.

Additional features : Provide a stable temperature and flow rate of fresh/cool water source for

the trainer. (Using of fresh water source from water tap in the laboratory is subjected to

unstable pressure and temperature and creates waste water that has to be drained to a water

drainage system in the laboratory).

LDA-TPC-2: Analog signal interface for PV (process variable) and SP (set point variable).

Additional objectives : Ability to use oscilloscope to monitor the PV and SP during the

experiment when the Computer DAQ System is not used.

LDA-TPC-3: Replacement of micro-controller based controller with PLC (Programmable Logic Controller) .

Additional objectives : Using PLC as controller in level and flow control application.

LDA-TPC-4: PLC programming software (computer is not included).

Additional objectives : Teaches students to do Ladder programming for PLC application in PID

close loop control.

LDA-TPC-5: Mobile Frame.

Additional feature : Provide mobility to the trainer and replace the need of a workbench in the

Laboratory.

LDA-TPC-6: Dust Cover.

Additional feature : to protect the trainer from dust and humidity.

LAB REQUIREMENTS:

Electrical Outlet: Single Phase 220 230 VAC, 50/60Hz , 16 A

Working space area (W x L): (eg : 160 cm x 180 cm).

Water source and waste water disposal drain is recommended.

APPROXIMATE SHIPPING DIMENSION AND WEIGHT:

Dimension (W x L x H) : 70 cm x 140 cm x 140 cm

Weight : 180 kg

Disclaimer;

This product is designed for technical educational purposes. Due to the nature of technology and our continuous R&D, Labtech reservesthe right to upgrade our product designs, literature descriptions and images without notice. In the event of an order, Labtech will issue aletter to the buyer notifying them of any substantial upgrades or revisions in the product ordered. Should any software either optional orincluded in the system be included in the order, Labtech recommends supply of the computerized system. Should end user choose tosupply their own computers, a minimum specification is required.