ID C Technology Training that Works www.idc-online.com/slideshare Practical Troubleshooting of Data Acquisition & SCADA Systems
May 28, 2015
IDC Technology Training that Workswww.idc-online.com/slideshare
Practical Troubleshooting of Data Acquisition & SCADA Systems
IDC Technology Training that Workswww.idc-online.com/slideshare
ObjectivesTo Review:
• PC-based data acquisition.• Examine installation of PC-based data acquisition
systems.
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Fundamentals of Data Acquisition
• Sensors and Transducers• Field Wiring• Signal Conditioning• Data Acquisition Hardware• PC (Operating System)• Data Acquisition Software
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Transducers and Sensors Electrical Signals are acquired using different devices
• Strain Gauges• RTD’s • Thermocouples• Thermistors• Flow Meters
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Field & Communications Cabling
• Physical connection from transducers and sensors to signal conditioning hardware/data acquisition hardware.
• Susceptible to noise (Good earthing & shielding vital).
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PC Based Data Acquisition
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Signal Conditioning Principle Tasks here:
• Amplification • Filtering• Linearisation• Isolation• Excitation
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Data Acquisition Hardware• Input, processing and conversion to digital format
using analog to digital converters.• Input of digital signals.• Digital signals in PC to analog outputs.• Output of digital signals.
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Data Acquisition Software
Three options here:• Program registers directly• Utilize low level driver software• Off the shelf application software
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Host Computer
Various buses• ISA• EISA• PCI
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Some typical configurations• Computer Plug-in• Distributed I/O• Stand-alone IEEE 488• Data Logger
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Computer Plug-in
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Distributed I/O
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Memory cards and standalone
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Direct Connection to Logger
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Remote Connection to Logger
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Distributed Logger Network
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Typical IEEE 488
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PC Based Data Acquisition
• High Speed• Low cost• Not as reliable as loggers
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IDC Technology Training that Workswww.idc-online.com/slideshare
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