Stopwatch and Timer Calibrations - National Institute of Standards ...

More documents

Recommendations

Info

Certain equipment, instruments or materials are identified in this paper in order to adequately specify the experimental details. Such identification does not imply recommendation by the National Institute of Standards and Technology nor does it imply the materials are necessarily the best available for the purpose. Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States. _______________________________________ National Institute of Standards and Technology Special Publication 960-12 Natl. Inst. Stand. Technol. Spec. Publ. 960-12 80 pages (January 2009) CODEN: NSPUE2 U.S. GOVERNMENT PRINTING OFFICE WASHINGTON: 2009 For sale by the Superintendent of Documents U.S. Government Printing Office Internet: bookstore.gpo.gov Phone: (202) 512-1800 Fax: (202) 512-2250 Mail: Stop SSOP, Washington, DC 20402-0001
Foreword FOREWORD 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, prior to the publication of the first edition of this guide in May 2004, no definitive text had existed on the subject. This NIST Recommended Practice Guide was created to a fill 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. iii
Page 1: NIST Recommended Practice Guide Sto
Page 7: Acknowledgements ACKNOWLEDGEMENTS
Page 10 and 11: Stopwatch and Timer Calibrations Se
Page 12 and 13: Stopwatch and Timer Calibrations Li
Page 15 and 16: Section 1 Introduction to Stopwatch
Page 17 and 18: Introduction s or 42.13 s, but tha
Page 19 and 20: Introduction basic principles that
Page 21 and 22: Introduction and their traceabilit
Page 23 and 24: Description of Timing Devices Sect
Page 25 and 26: Description of Timing Devices Figu
Page 27 and 28: Description of Timing Devices Figu
Page 29: Description of Timing Devices One
Page 32 and 33: Stopwatch and Timer Calibrations
Page 34 and 35: Stopwatch and Timer Calibrations a
Page 36 and 37: Stopwatch and Timer Calibrations 3.
Page 38 and 39: Stopwatch and Timer Calibrations 3.
Page 41 and 42: The Direct Comparison Method Secti
Page 43 and 44: The Direct Comparison Method Pleas
Page 45 and 46: The Direct Comparison Method uncer
Page 47 and 48: The Direct Comparison Method the u
Page 49 and 50: The Direct Comparison Method path,
Page 51 and 52: The Direct Comparison Method When
Page 53: The Direct Comparison Method Table
Page 56 and 57:
Stopwatch and Timer Calibrations To
Page 58 and 59:
Stopwatch and Timer Calibrations Fi
Page 60 and 61:
Stopwatch and Timer Calibrations di
Page 62 and 63:
Page 65 and 66:
The Time Base Method Section 7 The
Page 67 and 68:
The Time Base Method effectively t
Page 69 and 70:
The Time Base Method 7.B.2. Using
Page 71 and 72:
Required Uncertainty Section 8 How
Page 73 and 74:
Other Topics Related to Measurement
Page 75 and 76:
Page 77:
Page 80 and 81:
Page 82:
Stopwatch and Timer Calibrations [1
show all

Stopwatch and Timer Calibrations - National Institute of Standards ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?