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campbell scientific dataloggers PDF

18 Pages·2009·1.22 MB·English
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Apurva Gollamudi Brace Centre for Water Resources Management 16 June 2009 CAMPBELL SCIENTIFIC DATALOGGERS: AN INTRODUCTION THE DATALOGGER Controlling unit or “brain” of a monitoring  system Triggers external devices  Initiates measurement of sensors  Processes information  Stores data  Interfaces with communications devices  Independent of external control  DATALOGGER TYPES Size and Functionality • Portable, hand-held – In-built (sensor) – Industry-standard – Research-grade – Features • Customizable? – Interface options? – Power supply options? – CAMPBELL SCIENTIFIC DATALOGGERS Wiring Panel Connections • Analog input, digital I/O, pulse counters, switched – excitation channels, power and ground, data storage and communications ports Interface and Communications • Direct: CS I/O, Serial, USB, Keyboard, display – Remote: Radio, phone, cellular, satellite – Programming Language • CRBasic, Edlog, ShortCut to Windows (SCWin) – Data Storage • Capacity, format, peripherals – MEASUREMENT AND CONTROL SYSTEMS Peripherals  Multiplexers  Synchronous devices for measurement  Serial data interface  Relays  Terminal input modules  DATA STORAGE AND RETRIEVAL Key considerations  Site accessibility  Availability of communications services  Quantity of data collected  Frequency of data collected  Monitoring needs  ON-SITE OPTIONS TELEMETRY OPTIONS TELEMETRY: CONSIDERATIONS Transmission distance or area  Communication rate or throughput  Current drain  Service requirements  SENSORS Climate variables • Temperature – Relative humidity – Barometric pressure – Radiation – Precipitation – Wind speed and direction – Hydrology • Water level – Snow depth – Soil moisture –

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LoggerNet. An all-inclusive package to write programs, connect, view and download data – for Campbell Scientific dataloggers. Communications.
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