Author: John D. Wright
Publisher:
ISBN:
Category : Hydrometer
Languages : en
Pages : 40
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Book Description
The National Institute of Standards and Technology (NIST) provides calibration services for hydrometers by Cuckow s method, i.e. by weighing the hydrometer while it is immersed to specified scale markings in a liquid of known density (tridecane). Normally a calibration is done at three points, at approximately 10 %, 50 %, and 90 % of the scale. The calibration report includes a simple equation for each calibration point that gives the user a correction to the hydrometer reading that accounts for the surface tension of the liquid in which the hydrometer is used. The calibration results have an expanded uncertainty (with coverage factor of 2) of 100 parts in 10^6 or less of the liquid density. The apparatus was validated by comparisons using liquids of known density: water, toluene, tridecane, and trichloroethylene. Results from these comparisons agreed within 40 parts in 10^6 or less.
Author:
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages : 84
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 82
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Vern E. Bean
Publisher: Createspace Independent Publishing Platform
ISBN: 9781495921513
Category : Technology & Engineering
Languages : en
Pages : 46
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Book Description
The Special Publication 250-72 presents the detailed descriptions of the Liquid Volume Calibration Services offered by NIST. Information provided in this document includes: 1) specifications for the services; 2) design philosophy and theory; 3) NIST measurement system; 4) NIST operational procedures; 5) assessment of the measurement uncertainty including random and systematic errors and an error budge; and 6) internal quality control procedures used by NIST.
Author:
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ISBN:
Category :
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Calibration
Languages : en
Pages :
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Book Description
The National Institute of Standards and Technology (NIST) Calibration Services Users Guide provides detailed descriptions of currently available NIST calibration services, measurement assurance programs, and special test services. The following measurement areas are covered: (1) dimensional; (2) mechanical, including flow, acoustic, and ultrasonic; (3) thermodynamic; (4) optical radiation; (5) ionizing radiation; and (6) electromagnetic, including dc, ac, rf, and microwave. A separate Fee Schedule is issued annually, providing current prices for the services offered, updates on points of contact, and information on measurement seminars.
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ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 209
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