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Helium gas thermometer: Calibrated at three fixed points in this range and interpolated in a specified way. [11] 13.8033 1234.93 11 Platinum resistance thermometer: Resistance calibrated at various fixed points and interpolated in a specified way. Eleven distinct calibration procedures are specified. [8] 1234.93 3 Radiation thermometer
A maximum minimum thermometer, also known as Six's thermometer, is a thermometer which registers the maximum and minimum temperatures reached over a period of time, typically 24 hours. The original design contains mercury, but solely as a way to indicate the position of a column of alcohol whose expansion indicates the temperature; it is not a ...
A thermometer is a device that measures temperature ... The NIST Industrial Thermometer Calibration Laboratory Archived 2016-07-22 at the Wayback Machine;
E1256-11a Standard Test Methods for Radiation Thermometers (Single Waveband Type) This standard contains test methods for the following areas: [2] Calibration accuracy test method; Repeatability test method; Target size test method; Response time test method; Warm-up time test method; Long-term drift test method
The thermometers being calibrated are compared to calibrated thermometers by means of a bath whose temperature is uniformly stable. Unlike fixed-point calibrations, comparisons can be made at any temperature between −100 °C and 500 °C (−148 °F to 932 °F).
NIST had an operating budget for fiscal year 2007 (October 1, 2006 – September 30, 2007) of about $843.3 million. NIST's 2009 budget was $992 million, and it also received $610 million as part of the American Recovery and Reinvestment Act. [18] NIST employs about 2,900 scientists, engineers, technicians, and support and administrative personnel.
The Sakuma–Hattori equation shown above was found to provide the best curve-fit for interpolation of scales for radiation thermometers among a number of alternatives investigated. [2] The inverse Sakuma–Hattori function can be used without iterative calculation. This is an additional advantage over integration of Planck's law.
Scale of temperature is a methodology of calibrating the physical quantity temperature in metrology.Empirical scales measure temperature in relation to convenient and stable parameters or reference points, such as the freezing and boiling point of water.
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