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IEEE 268-1992

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

American National Standard for Metric Practice
Available format(s)

PDF

Superseded date

05-01-1997

Language(s)

English

Published date

10-28-1992

1 Scope
2 SI units and symbols
2.1 Classes of units
2.2 Base units
2.3 Supplementary units
2.4 Derived units
2.5 SI prefixes
2.5.1 Units of mass
3 Application of SI
3.1 General
3.2 Application of SI prefixes
3.2.1 General
3.2.2 Selection
3.2.3 Prefixes in compound units
3.2.4 Compound prefixes
3.2.5 Powers of units
3.2.6 Calculations
3.3 Other units
3.3.1 Units from different systems
3.3.2 Units in use with SI
3.3.3 Units in use with SI temporarily
3.3.4 Units and names to be abandoned
3.4 Other recommendations concerning units
3.4.1 Mass, force, and weight
3.4.2 Temperature
3.4.3 Nominal dimensions
3.4.4 Torque and work
3.4.5 Impact
3.4.6 Pressure and vacuum
3.4.7 Quantities expressed as pure numbers
3.5 Style and usage
3.5.1 Rules for writing unit symbols
3.5.2 Rules for writing names
3.5.3 Units formed by multiplication and division
3.5.4 Numbers
3.5.5 Attachment to unit symbols
3.5.6 Pronunciation
4 Bibliography
Appendices
A Tables of conversion factors
A1 General
A2 Notation
A3 Use
A4 Organization
B Terminology
C Rules for conversion and rounding
C1 General
C2 Significant digits
C3 Operations on data
C4 Accuracy and rounding
C5 Rounding values
C6 Conversion of linear dimensions of
       interchangeable parts
C7 Other units
D Development of the International System of Units
       (le Systeme Internationale d'Unites)
D1 History
D2 Advantages of SI
D3 Selection of units
D4 Definitions of SI base units
D5 Definitions of SI supplementary units
D6 Definitions of SI derived units with special
       names
E The BIPM and the meter convention
Tables
1 Base SI units
2 Supplementary SI units
3 Derived SI units with special names and symbols
4 Some common derived SI units without special
       names or symbols
5 SI prefixes
6 Units in use with SI
7 Units in use with SI temporarily
8 Recommended pronunciation of prefixes
9 Recommended pronunciation of selected units
Figure
1 Illustration of difference between mass (unit:
       kilogram) and force (unit: Newton)
Appendix Tables
A1 Classified list of units - space and time
A2 Classified list of units - mechanics
A3 Classified list of units - heat
A4 Classified list of units - electricity and
       magnetism
A5 Classified list of units - light
A6 Classified list of units - radiology
A7 Alphabetical list of units
C1 Rounding tolerance - inches to millimeters
C2 Conversion of temperature tolerance requirements

Guides application of modernized metric system.

Committee
Quantities, Units, and Symbols Standards Comm
DocumentType
Standard
Pages
80
PublisherName
Institute of Electrical & Electronics Engineers
Status
Superseded
SupersededBy
Supersedes

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ANSI INCITS 126 : 1986 : R2017 INFORMATION TECHNOLOGY - ONE- AND TWO-SIDED DOUBLE DENSITYUNFORMATTED 5.25 INCH (130 MM) 96 TRACKS PER INCH (3.8 TRACKS PER MM) FLEXIBLE DISK CARTRIDGE - GENERAL, PHYSICAL, AND MAGNETIC REQUIREMENTS FOR 7958 BPR USE
API MPM CH15 : 2001 : R2007 MANUAL OF PETROLEUM MEASUREMENT STANDARDS - CHAPTER 15: GUIDELINES FOR THE USE OF THE INTERNATIONAL SYSTEM OF UNITS (SI) IN THE PETROLEUM AND ALLIED INDUSTRIES
NFPA T3.29.2 : 2000 : R2009 PRESSURE SWITCH - PRESSURE RATING SUPPLEMENT TO NFPA/T2.6.1 R2-2000, FLUID POWER COMPONENTS - METHOD FOR VERIFYING THE FATIGUE AND ESTABLISHING THE BURST PRESSURE RATINGS OF THE PRESSURE CONTAINING ENVELOPE OF A METAL FLUID POWER PRESSURE SWITCH
ANSI INCITS 265 : 1995 : R2001 INFORMATION TECHNOLOGY - MAGNETIC TAPE AND CARTRIDGE FOR INFORMATION INTERCHANGE - UNRECORDED, 36-TRACK, PARALLEL, 12.57 MM (0.495 IN), 1944 FTPMM (49378 FTPI) GROUP-CODED RECORDING
ANSI INCITS 187 : 1990 : R2006 RECORDED MAGNETIC TAPE FOR LONGITUDINAL RECORDING OF INSTRUMENTATION DATA-INTERCHANGE
ANSI INCITS 54 : 1986 : R2017 INFORMATION SYSTEMS - RECORDED MAGNETIC TAPE FOR INFORMATION INTERCHANGE - (6250 CPI, GROUP-CODED RECORDING)
ANSI INCITS 171 : 1989 : R2000 ONE- AND TWO-SIDED, HIGH-DENSITY, UNFORMATTED, 90-MM (3.5 IN), 5,3-TPMM (135-TPI) FLEXIBLE DISK CARTRIDGE FOR 15916 BPR USE - GENERAL, PHYSICAL, AND MAGNETIC REQUIREMENTS
ANSI INCITS 264 : 1996 : R2006 INFORMATION TECHNOLOGY - UNRECORDED HELICAL-SCAN DIGITAL COMPUTER TAPE CASSETTE FOR INFORMATION INTERCHANGE, 19 MM (0.748 IN) TYPE D-1
ANSI INCITS 180 : 1990 : R2006 MAGNETIC TAPE AND CARTRIDGE FOR INFORMATION INTERCHANGE - 18-TRACK, PARALLEL, 1/2 INCH (12.65 MM), 37871 CPI (1491 CPMM), GROUP-CODED - REQUIREMENTS FOR RECORDING
ANSI INCITS 282 : 1996 : R2006 INFORMATION TECHNOLOGY - MAGNETIC TAPE CARTRIDGE FOR INFORMATION INTERCHANGE 0.50 IN (12.65 MM), SERIAL SERPENTINE, 128 TRACK, 62 500 BPI (2460 BPMM) DLT3 FORMAT
ANSI INCITS 261 : 1996 : R2006 INFORMATION TECHNOLOGY - EXTENDED MAGNETIC TAPE FORMAT FOR INFORMATION INTERCHANGE (36-TRACK, PARALLEL SERPENTINE, 12.65 MM (0.05 IN), 1491 CPMM (37 871 CPI) GROUP-CODED RECORDING)
ISA 7.0.01 : 1996 QUALITY STANDARD FOR INSTRUMENT AIR
ANSI INCITS 137 : 1988 INFORMATION TECHNOLOGY - ONE- AND TWO-SIDED, UNFORMATTED, 90-MM (3.5-IN) 5,3-TPMM (135-TPI), FLEXIBLE DISK CARTRIDGE FOR 7958 BPR USE - GENERAL, PHYSICAL AND MAGNETIC REQUIREMENTS
ANSI INCITS 204 : 1992 : R2002 INFORMATION SYSTEMS - RECORDED MAGNETIC TAPE FOR INFORMATION INTERCHANGE, 15 AND 18 TRACK, 0.250 INCH (6.35 MM) 10000 BPI (394 BPMM) STREAMING MODE, GROUP CODE RECORDING
SAE ARP 4990B : 2015 TURBINE FLOWMETER FUEL FLOW CALCULATIONS
IEEE 551 : 2006 CALCULATING SHORT-CIRCUIT CURRENTS IN INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
NFPA T3.9.22 : 2000 : R2014 PUMP/MOTOR - PRESSURE RATING SUPPLEMENT TO NFPA/T2.6.1 R2-2000, FLUID POWER COMPONENTS - METHOD FOR VERIFYING THE FATIGUE AND ESTABLISHING THE BURST PRESSURE RATINGS OF THE PRESSURE CONTAINING ENVELOPE OF A METAL FLUID POWER PUMP AND MOTOR
NFPA T3.29.2 : 2000 : R2005 PRESSURE SWITCH - PRESSURE RATING SUPPLEMENT TO NFPA/T2.6.1 R2-2000, FLUID POWER COMPONENTS - METHOD FOR VERIFYING THE FATIGUE AND ESTABLISHING THE BURST PRESSURE RATINGS OF THE PRESSURE CONTAINING ENVELOPE OF A METAL FLUID POWER PRESSURE SWITCH
EIA IS 647 : 1996 REQUIREMENTS FOR THE CONTROL OF ELECTROMAGNETIC INTERFERENCE EMISSIONS AND SUSCEPTIBILITY CHARACTERISTICS OF EQUIPMENT INTENDED TO OPERATE IN SEVERE ELECTROMAGNETIC ENVIRONMENTS
IEEE 647-1995 IEEE Standard Specification Format Guide and Test Procedure for Single-Axis Laser Gyros
ASME Y14.100 : 2017 ENGINEERING DRAWING PRACTICES - ENGINEERING DRAWING AND RELATED DOCUMENTATION PRACTICES

ASTM E 380 : 1993 Standard Practice for Use of the Internation System of Units (SI) (the Modernized Metric System) (Withdrawn 1997)
IEEE 260-1978 IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
ISO 31-11:1992 Quantities and units Part 11: Mathematical signs and symbols for use in the physical sciences and technology
ISO 31-0:1992 Quantities and units Part 0: General principles
ISO 31-2:1992 Quantities and units Part 2: Periodic and related phenomena
ISO 31-10:1992 Quantities and units Part 10: Nuclear reactions and ionizing radiations
ISO 370:1975 Toleranced dimensions Conversion from inches into millimetres and vice versa
ISO 31-12:1992 Quantities and units Part 12: Characteristic numbers

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