Lucon, E.
, Quintavalle, J.
and Lauria, D.
(2023),
New NIST Acquisition System for Reading Charpy Machine Encoders, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956902
(Accessed October 17, 2025)
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New NIST Acquisition System for Reading Charpy Machine Encoders
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Abstract
A new acquisition system was developed at NIST for reading angle values from the digital encoders of the three Charpy reference machines in Boulder, Colorado. The associated LabView software provides the conversion from encoder angles to absorbed energies, and allows quantifying energy losses due to windage and friction through the execution of five free swings. The accuracy of the a new acquisition system was verified by comparing Charpy test results obtained using both the old system (Tinius-Olsen encoder boxes) and the new system (National Instruments DAQ board + LabView software).Citation
NIST Interagency/Internal Report (NISTIR) - 8497
Report Number
8497
NIST Pub Series
Pub Type
NIST Pubs
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Keywords
Absorbed energy, acquisition system, Charpy test, digital encoder, LabView software
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Created November 13, 2023