Articles – Page 21 – Cal Lab Magazine

History of Lowry PMEL School

December 14, 2017 Office

by Sita Schwartz, Editor For an industry outsider looking in, an awful lot of metrology technicians and metrologists have their background in the military. There’s a reason for that: Precision Measurement Equipment Laboratories (PMEL) schools […]

Calibrating Long Scale DMMs with Fluke MET/CAL and the Fluke 57xxA Through 90-day Characterization

September 11, 2017 Office

by Michael Johnston Due to the high accuracy of the long scale (8½-digit) meters, the standards and methods required to perform a verification of the device often make automation of the process difficult. Alternatively, guardbanding […]

Using Metrology.NET to Calculate ISO/IEC 17025 Uncertainties for Fluke MET/CAL

September 11, 2017 Office

by Michael Schwartz Writing automated calibrations and controlling test equipment is easy. But once you have the automation working, now it’s time to calculate the uncertainties. Often calculating uncertainties and documenting the results takes longer […]

The New ISO/IEC 17025:2017

September 11, 2017 Office

by Dr. George Anastasopoulos This article has been written during the final draft (FDIS) stage of ISO/IEC 17025. As usual, only editorial changes are expected between FDIS and the final version of the standard. ISO/IEC […]

Metrology – Why We Do What We Do

September 11, 2017 Office

by Paul Hanssen It’s a familiar story. We’ve all been there. Your kids, wife, friends (and maybe even your dog) ask: “What is it you do again?” “Metrology,” you say. “Oh right, meteorology. Is it […]

Weigh Standard Assessment – Calibrating Liquid Flow Instruments Beyond +5 °C to +90 °C

June 21, 2017 Office

by Richard Fertell, Hamed Ershad, York Xu, Osborne Gumbs, & Tammy Tran This article is the second of a series describing how to perform liquid flow rate calibrations at fluid temperatures below +5 °C and […]

What is Measurement Risk?

June 21, 2017 Office

by Henry A. Zumbrun Imagine that a satellite is launched into space and communications are intermittent. This happens because the satellite is wobbling, which causes connection problems in the receiver. The cause of the wobbling […]

Chapter Two: The Pendulum and Standards of Measure in the Ancient World

June 21, 2017 Office

by Roland A. Boucher When the French proposed their first metric system in 1723, they had no idea it had been invented by the ancient Mesopotamians 5000 years earlier. Just as the French proposed to […]