GB/T 22773-2008Mechanical stopwatches (English PDF)
机械秒表
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 30, 2008
Implementation date
September 1, 2009
Scope
GB/T 22773-2008 is the English-translated version of 机械秒表.
GB/T 22773-2008 is the Chinese standard "Mechanical stopwatches". Its scope clause reads: This standard specifies the mechanical stopwatch (hereinafter referred to as the stopwatch) definitions, requirements, test methods, inspection rules and signs, packaging, transportation, Storage.
This standard is applicable to a fork tile escapement mechanism vertical mechanical stopwatch. Its clauses include terms and definitions; requirements.
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Document preview — GB/T 22773-2008
National Standard of the People's Republic of China
- ICS
- 39.040.10
- Classification
- Y 11
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Requirements
1 Scope
This standard specifies the mechanical stopwatch (hereinafter referred to as the stopwatch) definitions, requirements, test methods, inspection rules and signs, packaging, transportation,
Storage.
This standard is applicable to a fork tile escapement mechanism vertical mechanical stopwatch.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 2828.1 Sampling procedures for inspection - Part 1. by acceptance quality limit (AQL) retrieval batch inspection sampling plan (GB/T 2828.1-2003, ISO 2859-1.1991, IDT)
GB/T 2829 periodic inspection Sampling procedures and tables (suitable for process stability test)
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Has two seconds, mechanical stopwatch can measure two periods.
3.2
Within the specified test position and a predetermined time period measured by the absolute value of the largest difference between the points go.
3.3
At a predetermined position on the test and each time got all the difference average value within a predetermined time period measured.
3.4
At a predetermined position and a predetermined test period measured average score residuals and take the difference of the time difference.
3.5
At a predetermined position on the test and within the specified time period measured by the absolute value of the difference between the maximum seconds to go.
4 Requirements
4.1 Operating Temperature
Stopwatch when working at a temperature of -10 °C ~ 45 °C environment should not stop and go, which should continue to go meet the requirements of 4.4.
4.2 Reliability
4.2.1
stopwatch under normal conditions of use should not stop and go, zero, unit, component should not be loose.
4.2.2
stopwatch movement and the case should be securely installed on the bar, the button operation timing of the heart should not be loosening.
4.2.3
stopwatch buttons winding mechanism should be flexible and reliable, while the bar and there should be no catching phenomenon reliably on the full winding.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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