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Definitions (174)

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Span Gas


A calibration gas that is used to set the maximum reading on the scale of an analyzer.
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true value


The real or perfectly accurate value that would be obtained by measuring 100% of all available samples using a measurement process with no random or systematic (bias) variations at all. The true value is, therefore, a theoretical value because all measurement processes have some variations regardless of how small. Accuracy is used to state how clos [..]
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ALPHAGAZ™


A registered trademark for pure and instrumentation specialty gas products offered by Air Liquide worldwide.
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Blended Concentration


The numerical concentration assigned to a component based on the results of blending. A blended concentration is expressed in both concentration units (i.e. percent, parts per million) and concentration basis (i.e.mole/mole, weight/weight). A blended concentration may also be accompanied by a blend accuracy value (i.e. ±2%).
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AA


Abbreviation commonly used for Atomic Adsorption spectroscopy.
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ãÁ


Abbreviation commonly used for Atomic Adsorption spectroscopy.
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ÃÅ


Abbreviation commonly used for Atomic Adsorption spectroscopy.
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absolute pressure


A measurement of pressure which sets a total vacuum as having a value of zero, abbreviated as psia or bar. Absolute pressure is equal to the sum of a pressure gauge reading and atmospheric pressure (14.69 psia or 1 bar at sea level).
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absolute zero


The minimum point on the thermodynamic temperature scale: 0°K, -459.69°F or -273.16°C.
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