Articles Published in Cal Lab Magazine
by Henry Zumbrun, Morehouse Instrument Company Load cells are subject to numerous factors that can affect their performance. Some factors include the design of the load cell, the readout used with the load cell, environmental […]
by Lichun Wang & Yifan Zhang, Keysight Technologies In time response tests involving “non-ideal” pulse-modulated signals for wideband power sensor characterization, result correction becomes essential. Traditionally, the Root Sum Square (RSS) calculation is employed for […]
Now that more jobs have a “work from home” aspect, I thought I would focus this Automation Corner on how debugging has changed over the years. Back in the late 1990s, I first started working […]
by David F. Martson The development and use of intrinsic standards, e.g., Josephson Voltage Standard or JVS, has brought the primary level of uncertainty achievable for DC voltage down to a few nV/V (ppb), while […]
by James G. Salsbury When an accredited laboratory makes a statement of conformity to a specification, ISO/IEC 17025 requires the use of a decision rule that takes into account the level of risk associated with […]
by Dan Wiswell We’ve all heard people speak of accuracies and tolerances in more colorful language than what would be expected in a metrology lab. “Plus-or-minus a hand grenade” or, “Close enough for government work” […]
Over the years, I have had one foot in the metrology/test and measurement world and the other foot in software and software architecture. With two different perspectives, I tend to look at things from multiple […]
by David Lohbeck As an assessor, I am often asked the following question: “Is a calibration certificate issued from an ISO/IEC 17025-accredited laboratory always acceptable?” My answer: “No, it may not be.” Read on to […]
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