Extracts from the
CALIFORNIA CODE OF REGULATIONS TITLE 4, DIVISION 9
WEIGHTS AND MEASURES FIELD REFERENCE MANUAL (2017)
Chapter 1
Tolerances and Specifications for Commercial Weighing and Measuring Devices
Part 7: NIST Handbook 44 Appendices
Appendix A. Fundamental Considerations Associated with the Enforcement of Handbook 44 Codes
Appendix B. Units and Systems of Measurement Their Origin, Development, and Present Status
Appendix C. General Tables of Units of Measurement Appendix D. Definitions
CALIFORNIA DEPARTMENT OF FOOD AND AGRICULTURE
DIVISION OF MEASUREMENT STANDARDS
CCR 4000. Application Handbook 44 2017 Appendix A Fundamental Considerations
(DMS 01-01-17)
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DISCLAIMER
This document represents the Division of Measurement Standards field manual for enforcing regulations pertaining to weights and measures in California. This field manual is not to be considered as the official Code of Regulations, as published by Barclays Law Publishers.
NOTE: Language in Handbook 44 that is not adopted is annotated [NOT ADOPTED] in this document.
NOTE: Requirements that are different from, or in addition to, the requirements of Handbook 44 are included in the appropriate section this document. They are shaded, bordered, and numbered in the 4002 series to differentiate them from the Handbook 44 requirements.
To find the latest online version of the California Code of Regulations (CCR) Title 4, Division 9, visit the California Office of Administration Law (OAL) at:
http://ccr.oal.ca.gov/linkedslice/default.asp?SP=CCR-1000&Action=Welcome
The CCR may also be accessed at http://oal.ca.gov/ by selecting the link Titled California Code of Regulations under the list of Sponsored Links in the left column on the OAL Home page.
For information concerning the contents of this document, please contact the Division of Measurement Standards by e-mail at [email protected].
NIST Handbook 44 (2017 Edition) - Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices as adopted by the 101st National Conference on Weights and Measures in July 2016 is available at:
www.nist.gov/pml/wmd/pubs/hb44.cfm
http://ccr.oal.ca.gov/linkedslice/default.asp?SP=CCR-1000&Action=Welcomehttp://oal.ca.gov/mailto:[email protected]://www.nist.gov/pml/wmd/pubs/hb44.cfm
CCR 4000. Application Handbook 44 2017 Appendix A Fundamental Considerations
APNDX-A-i (DMS 01-01-17)
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Table of Contents
Appendix A. Fundamental Considerations Associated with the Enforcement of Handbook 44 Codes ........................................................................................ A-1
1. Uniformity of Requirements .................................................................................................................... A-11.1. National Conference Codes. ...................................................................................................... A-1 1.2. Form of Promulgation. .............................................................................................................. A-1
2. Tolerances for Commercial Equipment ................................................................................................. A-22.1. Acceptance and Maintenance Tolerances .................................................................................. A-2 2.2. Theory of Tolerances. ................................................................................................................ A-2 2.3. Tolerances and Adjustments...................................................................................................... A-2
3. Testing Apparatus .................................................................................................................................... A-23.1. Adequacy. .................................................................................................................................. A-2 3.2. Tolerances for Standards. .......................................................................................................... A-2 3.3. Accuracy of Standards. .............................................................................................................. A-3
4. Inspection of Commercial Equipment .................................................................................................... A-34.1. Inspection Versus Testing. ........................................................................................................ A-3 4.2. Necessity for Inspection. ........................................................................................................... A-3 4.3. Specification Requirements. ...................................................................................................... A-3 4.4. General Considerations. ............................................................................................................ A-4 4.5. Misuse of Equipment. ................................................................................................................ A-4 4.6. Recommendations. .................................................................................................................... A-4 4.7. Accurate and Correct Equipment. ............................................................................................. A-4
5. Correction of Commercial Equipment ................................................................................................... A-45.1. Adjustable Elements. ................................................................................................................. A-4 5.2. When Corrections Should Be Made. ......................................................................................... A-5 5.3. Gauging. .................................................................................................................................... A-5
6. Rejection of Commercial Equipment ............................................................................................................... A-56.1. Rejection and Condemnation .................................................................................................... A-5
7. Tagging of Equipment.............................................................................................................................. A-67.1. Rejected and Condemned. ......................................................................................................... A-6 7.2. Nonsealed and Noncommercial. ................................................................................................ A-6
8. Records of Equipment.............................................................................................................................. A-69. Sealing of Equipment ............................................................................................................................... A-6
9.1. Types of Seals and Their Locations. ......................................................................................... A-6 9.2. Exceptions. ................................................................................................................................ A-7
10. Rounding Off Numerical Values ............................................................................................................. A-710.1. Definition. ................................................................................................................................. A-7 10.2. General Rules. ........................................................................................................................... A-7 10.3. Rules for Reading of Indications. .............................................................................................. A-8 10.4. Rules for Common Fractions..................................................................................................... A-8
CCR 4000. Application Appendix A Fundamental Considerations Handbook 44 2017
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CCR 4000. Application Handbook 44 2017 Appendix A Fundamental Considerations
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Appendix A. Fundamental Considerations Associated with the Enforcement of Handbook 44 Codes
1. Uniformity of Requirements
1.1. National Conference Codes. Weights and measures jurisdictions are urged to promulgate and adhere to the National Conference codes, to the end that uniform requirements may be in force throughout the country. This action is recommended even though a particular jurisdiction does not wholly agree with every detail of the National Conference codes. Uniformity of specifications and tolerances is an important factor in the manufacture of commercial equipment. Deviations from standard designs to meet the special demands of individual weights and measures jurisdictions are expensive, and any increase in costs of manufacture is, of course, passed on to the purchaser of equipment. On the other hand, if designs can be standardized by the manufacturer to conform to a single set of technical requirements, production costs can be kept down, to the ultimate advantage of the general public. Moreover, it seems entirely logical that equipment that is suitable for commercial use in the specification states should be equally suitable for such use in other states.
Another consideration supporting the recommendation for uniformity of requirements among weights and measures jurisdictions is the cumulative an
