Articles Published in Cal Lab Magazine
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 […]
By Rachael V. Coquilla Wind measuring instruments, such as cup anemometers, propeller anemometers, ultrasonic anemometers, velocity meters, airflow meters, and many other types, are commonly used in various industries as monitoring devices or for evaluation […]
By Michael J. Haugh, Travis Pond, Christopher Silbernagel, Peter Torres, Kent Marlett, Fletcher Goldin, Susan Cyr National Security Technologies, LLC (NSTec), Livermore Operations, has two optical radiation calibration laboratories accredited by the National Institute of […]
By Martin L. Kidd This Metrology 101 article addresses the impact of thermoelectric voltage (EMF) on low-voltage measurements. Using a high precision digital multimeter, the author demonstrates how you can inadvertently introduce thermal EMF errors. […]
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