Gust, J.
, Graham, R.
and Lombardi, M.
(2009),
Stopwatch and Timer Calibrations (2009 edition), Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50659
(Accessed October 27, 2025)
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Stopwatch and Timer Calibrations (2009 edition)
Published
Author(s)
Jeff C. Gust, Robert M. Graham,
Abstract
Stopwatch and timer calibrations are perhaps the most common calibrations performed in the field of time and frequency metrology. Hundreds of United States laboratories calibrate many thousands of timing devices annually to meet legal and organizational metrology requirements. However, until the first publication of this guide (in 2004), no definitive text had existed on the subject. This revised NIST Recommended Practice Guide fills a gap in the metrology literature. It assists the working metrologist or calibration technician by describing the types of stopwatches and timers that require calibration, the specifications and tolerances of these devices, the methods used to calibrate them, and the estimated measurement uncertainties for each calibration method. It also discusses the process of establishing measurement traceability back to national and international standards.Citation
Special Publication (NIST SP) - 960-12
Report Number
960-12
NIST Pub Series
Pub Type
NIST Pubs
Download Paper
Keywords
calibration, frequency, legal metrology, time interval, traceability
Citation
Issues
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Created January 28, 2009, Updated January 27, 2020