QNET-HVAC User Manual
Contents
1. blower is a 24 Volt variable speed fan The input voltage of the halogen light should NOT be set over 6 Volts at any time even though it is rated at 12 Volts The heat radiated from the bulb can be harmful to some components in the HVAC module Revision 02 Page 2 QNET HVACT User Manual 5 HVAC Module Setup Section 5 1 explains how to setup the HVACT module on the ELVIS unit and properly ini tialize the system The LabView controllers associated with the HVACT QNET module are overviewed in Section 5 2 5 1 ELVIS and HVACT Module Setup Procedure The QNET modules are designed to quickly and easily plug into the ELVIS prototype board slot and be ready for operation Please configure the HVACT system for use with the LabView virtual instruments by following the steps below Step 1 Do NOT make the following connections while power is supplied to the hardware even when the Standby Switch on the rear panel of the NI ELVIS Benchtop Workstation is switched to OFF Step 2 Install the QNET HVAC board by completing the following steps a Position the large opening in the QNET board over the mounting bracket on the NI ELVIS benchtop workstation Note that some ELVIS workstations do not have the mounting brackets b Slide the PCI connector of the QNET module end into the female connector of the NI ELVIS workstation as shown in Figure 2 c Gently rock the board to ease it into place It may be a tight fit but do not force the board2. PROTOTYPING BOARD POWER VOLTAGE BYPASS E Figure 4 ELVIS Front Panel Power Switch Step 10 Turn ON the Prototyping Board Power switch on the front panel of the NI ELVIS workstation The Prototyping Board LED on the ELVIS front panel should turn bright green see Figure 4 and the bulk power LED labeled as B on the QNET module board should be bright green as well as shown in Figure 3 The on VARIABLE POWER SUPPLIES MANUAL a MANUAL e VOLTAGE SUPPLY board amplifier that drives the motor is now powered A damage to the halogen light and or fan Step 11 The hardware setup is complete and you are now ready to load a given LabView Turn OFF the Prototyping Board switch if the heater or fan go ON Any voltage applied by analog output channels 0 and 1 is amplified and delivered to the motor Take extra care when powering the QNET module to avoid causing any virtual instrument and interact with the ONET module 5 2 HVACT LabView Controllers There are two Quanser LabView Virtual Instruments supplied with the QNET HVACT module QNET_HVACT_Lab_05_System_ID vi QNET HVACT Lab 06 PI Control vi QNET HVACT Lab 07 ON OFF Control vi The first Quanser LabView virtual instrument is used to identify the heating and ventilation modeling parameters and its associated laboratory manual is QNET Experiment 05 HVAC The second Quanser LabView VI implements a PI controller to control the tem
3. Quanser NI ELVIS Trainer QNET Series QNET HVAC BUA SN ES ES PS Heating Ventilation and Air Conditioning HVAC User Manual User Manual QNET HVACT User Manual Table of Contents o tei Ser t 2 Requirements A A EE 4 A ACP et tl 4 1 Component Nomenclature 4 2 HVAC Plant Description DEN AC Mod le SU od ia 5 1 ELVIS and HVACT Module Setup Procedure 5 2 HVACT LabView Controllers Revision 02 Page QNET HVACT User Manual 1 Introduction The Quanser National Instruments Engineering Trainer QNET is a versatile and powerful training tool Amongst its many capabilities the QNET series of trainers allows for PC based control using the LABVIEW programming language a National Instruments E Series or M Series data acquisition card and an ELVIS workstation The QNET allows for a scalable laboratory setup utilizing the ELVIS workstation platform The Heating Ventillation and Air Conditioning Trainer QNET module is designed to operate on the NI ELVIS platform The ELVIS unit is connected to an NI E Series or M Series data acquisition card inside the PC The Labview program interacts with the data acquisition card to read two inputs chamber temperature and ambient temperature and control the output voltage to the heating halogen light and the cooling fan 2 Requirements The following system is required to complete the Heating Ventillation and Air Conditioning Trainer laboratory PC equipped
4. into place The QNET board should now slide into the board bracket LA T D a E a Figure 2 Fasten QNET Module onto ELVIS Revision 02 Page 3 QNET HVACT User Manual Step 3 Connect the AC DC wall transformer supplied with the ELVIS system to the corresponding input on the back panel of the NI ELVIS Benchtop Workstation Step 4 Connect the power cord to the AC DC transformer and plug the power cord into the wall outlet Step 5 Similarly to power the QNET module connect the AC DC wall transformer that was provided with the QNET module to its bulk power jack as shown in Figure 3 Figure 3 Module Power Step 6 Connect the power cord to the QNET wall transformer and plug the power cord into the wall outlet Step 7 Before powering up the system ensure the Prototyping Board Power switch is set to the OFF position and the Communications switch is set to the BYPASS mode Step 8 Power the NI ELVIS Benchtop Workstation by turning the Standby Switch on the rear panel of the system to ON Step 9 The System Power and Communications LEDs situated on the front panel of the NI ELVIS unit as shown in Figure 4 should be lit As depicted in Figure 3 verify also that the 15V 15V and 5V LEDs on the QNET module are lit They indicate that the board has been properly connected to the ELVIS unit Revision 02 Page 4 QNET HVACT User Manual NATIONAL INSTRUMENTS SYSTEM POWER COMMUNICATIONS SUPPLY
5. perature inside the chamber and its corresponding manual is QNET System Identification Revision 02 Page 5 QNET HVACT User Manual Experiment 06 HVAC PI Temperature Control In the third Quanser LabView VI a more practical on off controller is used to regulate the chamber temperature and its accompanying laboratory manual is QNET Experiment 07 HVAC ON OFF Temperature Control See QNET LabView Controllers guide for a general explanation on the challenges involved in the HVACT control laboratories Revision 02 Page 6
6. with an NI E Series or NI M Series data acquisition card connected to an NI ELVIS station Quanser QNET 012 Heating Ventillation and Air Conditioning Trainer HVACT module ELVIS CD installed for required drivers LabView 7 1 with the following add ons installed Control Design Toolkit Simulation Module 3 References 1 NI ELVIS User Manual 4 ONET Experiment 06 HVAC PI 2 ONET LabView Controllers Temperature Control 3 QNET Experiment 05 HVAC System 5 QNET Experiment 07 HVAC ON OFF Identification Temperature Control Revision 02 Page 1 QNET HVACT User Manual 4 HVAC Plant Presentation 4 1 Component Nomenclature As a quick nomenclature Table 1 below provides a list of the principal elements composing the Heating Ventilation and Air Conditioning HVAC Trainer system Every element is located and identified through a unique identification ID number on the HVAC plant represented in Figure 1 below ID Description ID Description 1 Heater Halogen Lamp 2 Blower Fan 3 Temperature Sensor 4 Chamber Duct Table 1 HVAC Component Nomenclature gene DE Figure 1 HVAC System 4 2 HVAC Plant Description The QNET HVAC Trainer system consists of a pexiglass duct or chamber equipped with a heater on one end and a blower on the other A thermistor is placed in between at the loca tion in the chamber where the temperature is to be controlled The heater is made of a 12 Volt halogen lamp The
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