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  • Other Sources  (3)
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  • 1
    Publication Date: 2019-06-28
    Description: The guide is intended as a resource to aid engineers and systems contracts in the design, implementation, and operation of metrology, calibration, and measurement systems, and to assist NASA personnel in the uniform evaluation of such systems supplied or operated by contractors. Methodologies and techniques acceptable in fulfilling metrology quality requirements for NASA programs are outlined. The measurement process is covered from a high level through more detailed discussions of key elements within the process, Emphasis is given to the flowdown of project requirements to measurement system requirements, then through the activities that will provide measurements with defined quality. In addition, innovations and techniques for error analysis, development of statistical measurement process control, optimization of calibration recall systems, and evaluation of measurement uncertainty are presented.
    Keywords: ENGINEERING (GENERAL)
    Type: NASA-RP-1342 , NAS 1.61:1342
    Format: application/pdf
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  • 2
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    In:  Other Sources
    Publication Date: 2019-07-13
    Description: Proposed calibration standard for mass flow rate of oxygen based on conduction of oxygen ions through solid electrolyte membrane made of zirconia and heated to temperature of 1,000 degrees C. Flow of oxygen ions proportional to applied electric current. Unaffected by variations in temperature and pressure, and requires no measurement of volume. Calibration cell based on concept used to calibrate variety of medical and scientific instruments required to operate with precise rates of flow of oxygen.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-19327 , NASA Tech Briefs (ISSN 0145-319X); 20; 1; P. 60
    Format: text
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  • 3
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    In:  Other Sources
    Publication Date: 2019-07-12
    Description: System adapts data in diverse formats for transmission. Microprocessor controls complex activities of data formatting, error checking, and transmission-priority arbitration. System developed for formatting signals from and to telemetry units on spacecraft for widespread telecommunication network.
    Keywords: ELECTRONIC SYSTEMS
    Type: GSC-13104 , NASA Tech Briefs (ISSN 0145-319X); 12; 7; P. 32
    Format: text
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