1、BRITISH STANDARD BS6911-7: 1992 ISO9248:1992 Testing earth-moving machinery Part 7: Specification for units of measurement and tolerancesBS6911-7:1992 This British Standard, having been prepared under the directionof the Technical Committee B/513, was publishedunder the authority ofthe Standards Boa
2、rd and comesinto effect on 15August1992 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference B/513/1 Draft for comment 90/18411 DC ISBN 0 580 21062 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted b
3、y Technical Committee B/513, Construction equipment and plant, and site safety, to Subcommittee B/513/1, Earth-moving machinery, upon which the following bodies were represented: Associated Offices Technical Committee British Coal Corporation Construction Plant (Hire Association) Federation of Civil
4、 Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Institution of Highways and Transportation Ministry of Defence Silsoe Research Institute Amendments issued since publication Amd. No. Date CommentsBS69
5、11-7:1992 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative reference 1 3 Units 1 4 Accuracy 1 5 Rounding off 1 Table1Measurement accuracy 2 List of references Inside back coverBS6911-7:1992 ii BSI 10-1999 National foreword This Part of
6、BS 6911 has been prepared under the direction of Technical Committee B/513, Construction equipment and plant, and site safety, and is identical with ISO9248:1992 Earth-moving machineryUnits for dimensions, performance and capacities, and their measurement accuracies, published by the International O
7、rganization for Standardization (ISO). ISO9248 was prepared by Subcommittee 1, Test methods relating to machine performance, of ISO Technical Committee127, Earth-moving machinery, with the active participation and approval of the UK. A British Standard does not purport to include all the necessary p
8、rovisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO 6165:1987 BS 6914 Terminology (i
9、ncluding definitions of dimensions and symbols) for earth-moving machinery. Part 1:1988 Glossary of terms for basic types of earth-moving machinery (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover and a back
10、 cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS6911-7:1992 BSI 10-1999 1 1 Scope This International Standard specifies basic units, symbols and tolerances for the measurem
11、ents of general machine dimensions, performance and capacities of earth-moving machinery as defined in ISO 6165. It does not cover methods and instrumentation to be used. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of
12、this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated
13、below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6165:1987, Earth-moving machineryBasic typesVocabulary. 3 Units Basic and derived units for earth-moving machinery shall be as specified in Table 1. 4 Accuracy The accuracy of measurements shall be withi
14、n the tolerances specified in Table 1. 5 Rounding off The rounding off of measurement results shall be done by adding or subtracting numerical values compatible with the specified tolerance.BS6911-7:1992 2 BSI 10-1999 Table 1 Measurement accuracy NOTE 1Basic and derived units and symbols in Table 1
15、have been taken from ISO 1000:1981, SI units and recommendations for the use of their multiples and of certain other units. Quantity Unit Symbol Tolerance a Basic units Linear dimension Mass Time Celsius temperature Angle Frequency metre kilogram second degree Celsius radian hertz m kg s C rad Hz 0,
16、5% 2% 1% u 200 C: 11 C 200 C:2% 100 0,02rad 1% Derived units Area Volume Force Pressure Power Angular velocity Speed Acceleration Torque Energy Volumetric rate Sound pressure level square metre cubic metre litre b newton pascal watt radian per second metre per second metre per second squared newton
17、metre joule cubic metre per second decibel (ref. 204Pa) m 2 m 3 l, L N Pa W rad/s m/s m/s 2 Nm J m 3 /s dB 2% 3% 1% 2% 2% 2% 2% 2% 2% 2% 2% 1dB a These tolerances also apply to other units used for the same quantity. Tolerances for specific quantities not covered in this International Standard, on a
18、 larger or a smaller scale, or for precision measurements, shall be specified in the individual International Standards which require them. b 11=1dm 3 BS6911-7:1992 BSI 10-1999 List of references See national foreword.BS6911-7: 1992 ISO9248:1992 BSI 389 Chiswick High Road London W4 4AL BSIBritishSta
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