Articles – Page 21 – Cal Lab Magazine

An Introduction to the Differences Between the Two Most Recognized Force Standards

April 3, 2018 Office

by Henry Zumbrun Morehouse has been performing both ASTM E74 and ISO 376 calibrations for more than fifteen years. We have been calibrating in accordance with the ASTM E74 standard since its introduction in 1974, […]

Creating a Taxonomy for Metrology

April 3, 2018 Office

by Michael Schwartz This paper covers the progress of the MII (Measurement Information Infrastructure) effort to create a standard for expressing a calibration laboratory capabilities, ISO/IEC 17025 Scope of Accreditation (SoA) in a XML formatted […]

Basic Rise Time Measurements

December 14, 2017 Office

by Jerry Eldred Although rise time is a common calibration measurement in pulse/function generators and some oscilloscopes, it is often not well understood. Making a good rise time measurement is somewhat similar to home stereo […]

Large Volume Cone Differential Pressure Meters

December 14, 2017 Office

by Richard Steven & Joshua Kinney Cone DP meters are a member of the generic DP flow meter family. Used extensively throughout different industries for quarter of a century, the cone meter is now a […]

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 […]