The analysis and recommended design of a high-resolution digital data acquisition system for the in situ measurement of various physical and chemical parameters of sea water Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/76537390k

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  • The lack of availability of a single, complete paper on the analysis of a digital data acquisition system for in situ oceanographic measurements brought about the present work. In order to compile an accurate technical paper on such a complex system, it was necessary to design, construct, and calibrate a system for the in situ measurement of various physical and chemical properties of sea water. A unique digital encoding circuit was developed which utilizes the basic principles of null balance, resistance ratio bridge and potentiometer measurements. The circuit is a uniquely loaded binary ladder resistance network. Variation of the loading allows resistance ratio and potentiometric measurements to be made over different ranges with a constant high degree of resolution. The developed system has the capability of measuring any parameter which can be converted into a varying voltage, current, or resistance. The range over which the measurement can be made is adjustable; and the resolution equals ± 0.006% of the full range value. The resolution is constant over the full range, as a result of the analog-to- digital converter linearity characteristics.
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  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-03-16T15:44:03Z (GMT) No. of bitstreams: 1 AlbinArthurGrayson1968.pdf: 949347 bytes, checksum: 85264fd56f498b68b0c475437edddf2f (MD5)
  • description.provenance : Made available in DSpace on 2012-03-16T15:44:03Z (GMT). No. of bitstreams: 1 AlbinArthurGrayson1968.pdf: 949347 bytes, checksum: 85264fd56f498b68b0c475437edddf2f (MD5) Previous issue date: 1968-03-14
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-03-16T15:40:18Z (GMT) No. of bitstreams: 1 AlbinArthurGrayson1968.pdf: 949347 bytes, checksum: 85264fd56f498b68b0c475437edddf2f (MD5)
  • description.provenance : Submitted by Sergio Trujillo (jstscanner@gmail.com) on 2012-03-14T22:37:02Z No. of bitstreams: 1 AlbinArthurGrayson1968.pdf: 949347 bytes, checksum: 85264fd56f498b68b0c475437edddf2f (MD5)

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