Calibration of high heat flux sensors at NIST
نویسندگان
چکیده
منابع مشابه
Calibration of High Heat Flux Sensors at NIST
An ongoing program at the National Institute of Standards and Technology (NIST) is aimed at improving and standardizing heat-flux sensor calibration methods. The current calibration needs of U.S. science and industry exceed the current NIST capability of 40 kW/m2 irradiance. In achieving this goal, as well as meeting lower-level non-radiative heat flux calibration needs of science and industry,...
متن کاملRadiative Calibration of Heat-Flux Sensors at NIST: Facilities and Techniques
We present an overview of the National Institute of Standards and Technology high temperature blackbodies, both in operation and in development, suitable for heat-flux sensor calibration. Typical results of calibrations using the transfer technique in the 25 mm Variable-Temperature Blackbody are presented to demonstrate the long-term repeatability of the calibration technique. A comparative stu...
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In the transfer calibration of heat flux sensors, a correction for the irradiance distribution across the sensing area may be required when the sensing areas of the reference and test sensors are different. A method to calculate this correction using well-known equations for the configuration factors is presented. Also, estimates of the correction for test conditions corresponding to the transf...
متن کاملHigh Power CW Wattmeter Calibration at NIST
The National Institute of Standards and Technology has established a measurement capability to support high power systems and devices. The automated wattmeter calibration system operates at power levels of 1 to 1000 W for frequencies from 1 to 30 MHz and 1 to 500 W from 30 to 400 MHz. A cascaded coupler technique is used to extend power measurements to high levels which are traccable to a 10 mW...
متن کاملComparative Calibration of Heat Flux Sensors in Two Blackbody Facilities
National Institute of Standards and Technology, Gaithersburg, MD 20899-0001 This paper presents the results of heat flux sensor calibrations in two blackbody facilities: the 25 mm variable temperature blackbody (VTBB) primary facility and a recently developed 51 mm aperture spherical blackbody (SPBB) facility. Three Schmidt-Boelter gages and a Gardon gage were calibrated with reference to an el...
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ژورنال
عنوان ژورنال: Journal of Research of the National Institute of Standards and Technology
سال: 1997
ISSN: 1044-677X
DOI: 10.6028/jres.102.032