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24 relations: Certified reference materials, Dimensionless physical constant, Gauge block, History of measurement, History of the metre, Institute of Electrical and Electronics Engineers, International Bureau of Weights and Measures, International System of Units, Josephson effect, Kibble balance, Kilogram, Measurement, Measurement uncertainty, Measuring instrument, Metre, Metrology, National Institute of Standards and Technology, Platinum-iridium alloy, Realisation (metrology), Speed of light, Technical standard, Unit of measurement, Volt, Weston cell.
Certified reference materials
Certified Reference Materials (CRMs) are ‘controls’ or standards used to check the quality and metrological traceability of products, to validate analytical measurement methods, or for the calibration of instruments.
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Dimensionless physical constant
In physics, a dimensionless physical constant, sometimes called a fundamental physical constant, is a physical constant that is dimensionless.
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Gauge block
Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths.
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History of measurement
The earliest recorded systems of weights and measures originate in the 3rd or 4th millennium BC.
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History of the metre
In the aftermath of the French Revolution (1789), the traditional units of measure used in the Ancien Régime were replaced.
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Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers (IEEE) is a professional association with its corporate office in New York City and its operations center in Piscataway, New Jersey.
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International Bureau of Weights and Measures
The International Bureau of Weights and Measures (Bureau international des poids et mesures) is an intergovernmental organization established by the Metre Convention, through which Member States act together on matters related to measurement science and measurement standards.
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International System of Units
The International System of Units (SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement.
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Josephson effect
The Josephson effect is the phenomenon of supercurrent—i.e. a current that flows indefinitely long without any voltage applied—across a device known as a Josephson junction (JJ), which consists of two superconductors coupled by a weak link.
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Kibble balance
A Kibble balance (previously watt balance) is an electromechanical weight measuring instrument that measures the weight of a test object very precisely by the strength of an electric current and a voltage.
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Kilogram
The kilogram or kilogramme (symbol: kg) is the base unit of mass in the International System of Units (SI), and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as "Le Grand K" or "Big K"), a cylinder of platinum-iridium alloy stored by the International Bureau of Weights and Measures at Saint-Cloud, France.
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Measurement
Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events.
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Measurement uncertainty
In metrology, measurement uncertainty is a non-negative parameter characterizing the dispersion of the values attributed to a measured quantity.
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Measuring instrument
A measuring instrument is a device for measuring a physical quantity.
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Metre
The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).
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Metrology
Metrology is the science of measurement.
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National Institute of Standards and Technology
The National Institute of Standards and Technology (NIST) is one of the oldest physical science laboratories in the United States.
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Platinum-iridium alloy
Platinum-iridium alloys are alloys of the platinum group precious metals platinum and iridium.
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Realisation (metrology)
The realisation of a unit of measure is the conversion of its definition into reality.
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Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
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Technical standard
A technical standard is an established norm or requirement in regard to technical systems.
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Unit of measurement
A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.
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Volt
The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.
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Weston cell
The Weston cell is a wet-chemical cell that produces a highly stable voltage suitable as a laboratory standard for calibration of voltmeters.
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References
[1] https://en.wikipedia.org/wiki/Standard_(metrology)
