Articles Published in Cal Lab Magazine
by Edward Morrell High-speed clearance sealed piston provers for measuring gas flow rates have been available for over twenty years and have gained wide acceptance as a fast, cost-effective, primary calibration instrument for gas flow. […]
by Charles Sperrazza Verification of the Standing Wave Ratio (SWR) of the 50 MHz 1 mW output power reference is a key step in performing a calibration of a RF power meter. Higher than desired […]
by David Deaver The Guides to Measurement Uncertainty (GUMs) give very prescriptive methods for calculating measurement uncertainty at individual points. Some laboratories undertake the calculation of uncertainty at many points and state them in their […]
by Wesley B. England This paper is an uncertainty analysis performed by the Liquid Flow Lab of the Army Primary Standards Laboratory (APSL) for the calibration of positive displacement piston prover using a volumetric water […]
by Agilent Technologies Connectors, adapters, and calibration standards in the millimeter-wave frequency range (26 GHz to 70 GHz) are VERY expensive. Although all connectors eventually wear, with knowledge, care, and proper technique, you can easily […]
by Mamdouh M. Halawa This paper describes a practical method for implementation and verification of building-up AC-DC current transfer from 10 mA and up to 10 A. A Planar multi-junction thermal converter (PMJTC) at the […]
by Jacob E. Ricker, Jay H. Hendricks, Douglas Olson, and Greg Strouse In today’s fast-paced world and ever-expanding quality assurance requirements, the National Institute of Standards and Technology (NIST) has developed a system to fill […]
By Jay Klevens Accurate electrical current measurement is critical to the power and electrical test industries. DC and low frequency ac current is usually measured using a current shunt. Shunt calibration has unique error sources […]
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