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Stopwatch and Timer Calibrations

By Gust, Jeff C.

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Book Id: WPLBN0000695844
Format Type: PDF eBook
File Size: 903.23 KB.
Reproduction Date: 2005

Title: Stopwatch and Timer Calibrations  
Author: Gust, Jeff C.
Volume:
Language: English
Subject: Technology., Reference materials, Technology and literature
Collections: Techonology eBook Collection
Historic
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Gust, J. C. (n.d.). Stopwatch and Timer Calibrations. Retrieved from http://community.worldlibrary.in/


Description
Technical Reference Publication

Excerpt
Introduction: To Stopwatch and Timer Calibrations. This document is a recommended practice guide for stopwatch and timer calibrations. It discusses the types of stopwatches and timers that require calibration, the specifications and tolerances of these devices, and the methods used to calibrate them. It also discusses measurement uncertainties and the process of establishing measurement traceability back to national and international standards.

Table of Contents
TABLE OF CONTENTS List of Figures .....................................................................................ix List of Tables ........................................................................................x 1. Introduction to Stopwatch and Timer Calibrations ..........1 1.A. The Units of Time Interval and Frequency ................1 1.B. A Brief Overview of Calibrations ...............................3 1.C. Traceability and Coordinated Universal Time (UTC) ...................................................................5 2. Description of Timing Devices that Require Calibration ..............................................................9 2.A. Stopwatches ................................................................9 2.A.1. Basic Theory of Operation ............................ 11 2.B. Timers ..........................................................................13 2.C. Commercial Timing Devices .....................................14 3. Specifications and Tolerances ..........................................15 3.A. Interpreting Manufacturer's Specifications..............15 3.B. Tolerances Required for Legal Metrology ...............19 4. Calibration Methods...........................................................21 4.A. Direct Comparison Method .......................................21 4.A.1. References for Direct Comparison Method ......................................21 4.A.2. Calibration Procedure for Direct Comparison Method ...........................25 4.B. Totalize Method ...........................................................27 4.C. Time Base Method......................................................29

 

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