NLST: United States Department of Commerce Technology Administration National Institute of Standard''''s and Measuring Devices potx

344 689 0
  • Loading ...
1/344 trang
Tải xuống

Thông tin tài liệu

Ngày đăng: 27/06/2014, 08:20

United States Department of Commerce Technology Administration National Institute of Standards and Technology SPECIFICATIONS, TOLERANCES, AND OTHER TECHNICAL REQUIREMENTS FOR WEIGHING AND MEASURING DEVICES as adopted by the 91st National Conference on Weights and Measures 2006 44 2007 NIST Handbook Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices as adopted by the 91 st National Conference on Weights and Measures 2006 Editors: Tina Butcher Linda Crown Lynn Sebring Richard Suiter Juana Williams National Institute of Standards and Technology Weights and Measures Division Gaithersburg, MD 20899-2600 U. S. Department of Commerce Carlos M. Gutierrez, Secretary Technology Administration Robert Cresanti, Under Secretary of Commerce for Technology National Institute of Standards and Technology William A. Jeffrey, Director NIST Handbook 44 2007 Edition Supersedes NIST Handbook 44, 2006 Edition Certain commercial entities, equipment, or materials may be identified in this document in order to describe an experimental procedure or concept adequately. Such identification is not intended to imply recommendation or endorsement by the National Institute of Standards and Technology, nor is it intended to imply that the entities, materials, or equipment are necessarily the best available for the purpose. National Institute of Standards and Technology Handbook 44, 2007 Edition Natl. Inst. Stand. Technol. Handb. 44, 2005 Ed., 319 pages (Oct. 2006) CODEN: NIHAE2 U. S. GOVERNMENT PRINTING OFFICE WASHINGTON: 2006 For sale by the Superintendent of Documents, U. S. Government Printing Office Internet: bookstore.gpo.gov – Phone: toll free (866) 512-1800; DC area (202) 512-1800 – Fax: (202) 512-2550 Mail: Stop SSPO, Washington, DC 20402-0001 Handbook 44 - 2007 Foreword Handbook 44 was first published in 1949, having been preceded by similar handbooks of various designations and in several forms, beginning in 1918. Handbook 44 is published in its entirety each year following the Annual Meeting of the National Conference on Weights and Measures (NCWM). The Committee on Specifications and Tolerances of the NCWM developed the 2007 Edition with the assistance of the Weights and Measures Division (WMD) of the National Institute of Standards and Technology (NIST). This handbook includes amendments endorsed by the 91 st National Conference on Weights and Measures during its Annual Meeting in 2006. NIST has a statutory responsibility for "cooperation with the states in securing uniformity of weights and measures laws and methods of inspection." In partial fulfillment of this responsibility, NIST is pleased to publish these recommendations of the NCWM. This handbook conforms to the concept of primary use of SI (metric) measurements recommended in the Omnibus Trade and Competitiveness Act of 1988 by citing SI units before inch-pound units where both units appear together and placing separate sections containing requirements in SI units before corresponding sections containing requirements in inch- pound units. In some cases, however, trade practice is currently restricted to the use of inch-pound units; therefore, some requirements in this handbook will continue to specify only inch-pound units until the NCWM achieves a broad consensus on the permitted SI units. In accord with NIST policy, the meter/liter spellings are used in this document. However, the metre/litre spellings are acceptable, and are preferred by the NCWM. It should be noted that a space has been inserted instead of commas in all numerical values greater than 9999 in this document, following a growing practice, originating in tabular work, to use spaces to separate large numbers into groups of three digits. This avoids conflict with the practice in many countries to use the comma as a decimal marker. iii Handbook 44 - 2007 Committee on Specifications and Tolerances of the 91 st Conference Clark Cooney, OR Carol Fulmer, SC Todd R. Lucas,OH Bret Saum, CA Michael Sikula, NY Ted Kingsbury, Canada, Technical Advisor Juana Williams and Richard Suiter, NIST, Technical Advisors Past Chairmen of the Committee Conference Chairman Conference Chairman 8-11 L.A. Fischer, NBS 67 F.C. Nagele, MI 12-28 F.S. Holbrook, NBS 68 L.H. DeGrange, MD 29-38 J.P. McBride, MA 69 S.A. Colbrook, IL 39-42 R.E. Meek, IN 70 D.A. Guensler, CA 43-44 J.E. Brenton, CA 71-72 F. Gerk, NM 45-47 C.L. Jackson, WI 73 K. Butcher, MD 48 T.C. Harris, VA 74 R. Andersen, NY 49-50 R.E. Meek, IN 75 D. Watson, TX 51-52 G.L. Johnson, KY 76 J. Truex, OH 53 H.D. Robinson, ME 77-78 C. Carroll, MA 54-55 R. Rebuffo, NE 79 J. Jeffries, FL 56-57 D.E. Konsoer, WI 80 R. Suiter, NE 58 J.C. Mays, FL 81 G. West, NM 59 T.F. Brink, VT 82-83 R. Murdock, NC 60 W.S. Watson, CA 84 D. Brown, IA 61 K.J. Simila, OR 85 M. Hopper, CA 62 W.E. Czaia, MN 86 G. Shefcheck, OR 63 M.L. Kinlaw, NC 87 M. Coyne, MA 64 J.A. Bird, NJ 88 R. Wotthlie, MD 65 D.A. Guensler, CA 89 C. VanBuren, MI 66 G.A. Delano, MT 90 J. Kane, MT iv Handbook 44 - 2007 Table of Contents Page Foreword iii Committee iv Table of Contents v 2006 Amendments vii 2006 Editorial Changes ix Introduction 1 Section 1. 1.10. General Code 1-1 Section 2. 2.20. Scales 2-3 2.21. Belt-Conveyor Scale Systems 2-47 2.22. Automatic Bulk Weighing Systems 2-57 2.23. Weights 2-63 2.24. Automatic Weighing Systems 2-67 Section 3. 3.30. Liquid-Measuring Devices 3-3 3.31. Vehicle-Tank Meters 3-21 3.32. Liquefied Petroleum Gas and Anhydrous Ammonia Liquid-Measuring Devices 3-31 3.33. Hydrocarbon Gas Vapor-Measuring Devices 3-41 3.34. Cryogenic Liquid-Measuring Devices 3-49 3.35. Milk Meters 3-57 3.36. Water Meters 3-65 3.37. Mass Flow Meters 3-71 3.38. Carbon Dioxide Liquid-Measuring Devices 3-83 Section 4. 4.40. Vehicle Tanks Used as Measures 4-3 4.41. Liquid Measures 4-7 4.42. Farm Milk Tanks 4-9 4.43. Measure-Containers 4-15 4.44. Graduates 4-17 4.45. Dry Measures 4-21 4.46. Berry Baskets and Boxes 4-23 Section 5. 5.50. Fabric-Measuring Devices 5-3 5.51. Wire- and Cordage-Measuring Devices 5-7 5.52. Linear Measures 5-11 5.53. Odometers 5-13 5.54. Taximeters 5-17 5.55. Timing Devices 5-23 5.56.(a) Grain Moisture Meters 5-27 5.56.(b) Grain Moisture Meters 5-35 5.57. Near-Infrared Grain Analyzers 5-41 5.58. Multiple Dimension Measuring Devices 5-49 5.59. Electronic Livestock, Meat, and Poultry Evaluation Systems and/or Devices - Tentative Code 5-57 v Handbook 44 - 2007 Table of Contents (continued) Page Appendices A. Fundamental Considerations Associated with the Enforcement of Handbook 44 Codes A-1 B. Units and Systems of Measurement - Their Origin, Development, and Present Status B-1 C. General Tables of Units of Measurement C-1 D. Definitions D-1 vi Handbook 44 - 2007 2006 Amendments 2006 Amendments The following table lists the codes, paragraphs, and pages in which the 9l st National Conference on Weights and Measures made amendments. In the column headed “Action,” changes are noted as “added,” “amended,” “deleted,” or “renumbered.” Each code, section, or paragraph that has been changed will be noted as “Added 2006” or “Amended 2006.” SECTION CODE S&T ITEM NO. PARAGRAPH ACTION PAGE 310-1 G-S.1. Amended 1-2 1.10 General 310-2 G-S.1.1. Amended 1-3 320-6 T.N.4.5.1. Amended 2-32 T.N.4.6.(b), Table T.N.4.6. Amended 2-33 320-7 T.N.4.7. Added 2-34 320-9 UR.2.6.1. Amended 2-38 2.20 Scales 320-10 UR.3.7. Amended 2-40 2.21 Belt-Conveyor Scale Systems 321-1 N.1.1. Amended 2-49 320-1 S.1.2. Amended 3-3 330-3 S.2.2., Table S.2.2. Amended 3-8– 3-9 3.30 Liquid-Measuring Devices 330-5 Table T.2. Amended 3-15 331-1 S.1.1.3. Amended 3-21 S.2.2. Amended 3-23 3.31 Vehicle-Tank Meters 331-2 Table S.2.2. Added 3-24 vii 2006 Amendments Handbook 44 - 2007 SECTION CODE S&T ITEM NO. PARAGRAPH ACTION PAGE S.2.2. Amended 3-34 332-1 Table S.2.2. Added 3-35 3.32 LPG & Anhydrous Ammonia Liquid Measuring Devices 332-2 S.4.3. Added, renumbered subsequent paragraph 3-36 S.2.5. Amended 3-52 3.34 Cryogenic Liquid- Measuring Devices 334-1 Table S.2.5. Added 3-52 S.2.3. Amended 3-59 3.35 Milk Meters 335-1 Table S.2.3. Added 3-60 337-1 S.3.5., Table S.3.5. Amended 3-74– 3-75 S.4.1. Amended 3-75 3.37 Mass Flow Meters 337-2 S.5.1. Added, Renumbered subsequent paragraph 3-77 S.2.5. Amended 3-85 3.38 Carbon Dioxide Liquid-Measuring Devices 338-1 Table 2.5. Added 3-86 D min Added D-6 Appendix D Definitions 320-7 E min Added D-7 viii Handbook 44 - 2007 2006 Amendments 2006 Editorial Changes SECTION CODE PARAGRAPH ACTION PAGE Section M Changed “Issue(s)” to “Item(s)” 4 Introduction NCWM Form 15 Changed “Issue” to “Item,” and “Informational Issue” to “Information Item” 7 G-S.5.3.1. Deleted “[Made Retroactive 1990]” 1-4 G-S.5.6. Deleted “[Made Retroactive 1990]” 1-5 1.10 General Table 1. Changed title of table to clarify that it applies to Paragraph G-S.5.6.1. 1-5 S.1.2. Moved individual examples from the end of the paragraph to the subparagraphs with which the examples are associated. 2-3 – 2-4 S.2.1.3.3. Replaced references to “automated zero-setting mechanism” with “zero-tracking” for consistency with S.2.1.3. 2-10 S.5.4. Reorganized paragraph for clarity. 2-13 N.3.2. Added reference to Table 4 after “test load” to clarify the use of the term. 2-25 T.N.4.5.1. Moved the first sentence “However . . . 0.2e” from part (b) to the end of part (a). Added “in (a)” following “conditions in part (b). 2-32 T.N.4.5.2. Moved the first sentence “However . . . 0.6e” from part (b) to the end of part (a). Added “in (a)” following “conditions” in part (b). 2-33 2.20 Scales UR.3.9. Changed numbering of paragraph from “(1), (2) . . .” to “(a), (b) . . .”. for consistency. 2-40 N.1.1.(a) Changed number of paragraph from “(i), (ii) . . . ” to “(1), (2), . . .” for consistency. 2-74 T.3.2.2. Corrected table title replacing “Dynamic” with “Automatic” 2-76 T.3.3.1.2.(a) Changed “must” to “shall” for consistency with use in other paragraphs. 2-77 T.3.3.1.2.(b) Changed number of paragraph from “(i), (ii), (iii) . . . ” to “(1), (2), (3) . . .” for consistency. 2-77 2.24 Automatic Weighing Systems T.3.3.2.2.(b) Changed number of paragraph from “(i), (ii), (iii) . . . ” to “(1), (2), (3) . . .” for consistency. 2-77 – 2-78 S.1.6., S.1.7. Inserted “Additional” at the beginning of the title to clarify that these are in addition to other operating requirements specified in S.1. 3-5, 3-7 S.2.2. Added the phrase “or interchange” following “adjustment” for consistency among the Section 3.30. codes. 3-8 3.30 Liquid-Measuring Devices S.2.2.1. Changed numbering of paragraph from “(1), (2) . . .” and “(a), (b) . . .” to be consistent with other paragraphs. 3-8 ix [...]... by weights and measures officials and representatives of interested manufacturers and industries Eventually the proposals of the Committee are voted upon only by the weights and measures officials All of the specifications, tolerances, and other technical requirements given herein are recommended by the National Conference on Weights and Measures for official promulgation in and use by the states in... follows: Executive Secretary, National Conference on Weights and Measures, National Institute of Standards and Technology, 100 Bureau Drive, Stop 2600, Gaithersburg, MD 20899-2600 1 Introduction Handbook 44 - 2007 NIST Weights and Measures Division 100 Bureau Drive, Stop 2600 Gaithersburg, Maryland 20899-2600 Attention: Specifications and Tolerances Committee b A copy of the proposal must be sent to... their control of commercial weighing and measuring apparatus A similar recommendation is made with respect to the local jurisdictions within a state in the absence of the promulgation of specifications, tolerances, and other technical requirements by a state agency B Purpose - The purpose of these technical requirements is to eliminate from use, weights and measures and weighing and measuring devices that... mechanism for consideration of amendments or additions to the specifications, tolerances, and other technical requirements D Submission of Agenda Items - Preamble - The Constitution of the NCWM requires that its Officers and Committees observe the principles of due process for the protection of the rights and interests of affected parties Specifically, it requires that Committees and Officers: (a) give reasonable... D-12 D-23 Handbook 44 - 2007 Introduction Introduction A Source - The specifications, tolerances, and other technical requirements published herein comprise, in their latest form, all of the current codes as adopted by the National Conference on Weights and Measures (NCWM), Inc 1 NCWM is supported by the National Institute of Standards and Technology (NIST), which provides the NCWM secretariat and publishes... federal, state, and local weights and measures officials, the equipment manufacturers, installers, and service agencies/agents As noted in General Code Paragraph G-A.1 Commercial and Law-Enforcement Equipment, applicable portions of Handbook 44 may be used by the weights and measures official to test noncommercial weighing and measuring equipment upon request Additionally, applicable language in Handbook 44... year following the adoption by the National Conference on Weights and Measures and publication by the National Institute of Standards and Technology G-S Specifications G-S.1 Identification - All equipment, except weights and separate parts necessary to the measurement process but not having any metrological effect, shall be clearly and permanently marked for the purposes of identification with the following... provided, to permit: (a) inspecting and testing the device; (b) inspecting and applying security seals to the device; and (c) readily bringing the testing equipment of the weights and measures official to the device by customary means and in the amount and size deemed necessary by such official for the proper conduct of the test Otherwise, it shall be the responsibility of the device owner or operator... as of January 1, 2002] (b) the width of the clear space between weight graduations, and (c) three-fourths of the width of the clear space between money value graduations When the index of an indicator extends along the entire length of a graduation, that portion of the index of the indicator that may be brought into coincidence with the graduation shall be of the same width throughout the length of. .. clearly within one of the particular equipment classes for which separate codes have been established With respect to such equipment, code requirements and provisions shall be applied with due regard to the design, intended purpose, and conditions of use of the equipment G-A.4 Metric Equipment - Employment of the weights and measures of the metric system is lawful throughout the United States These specifications, . United States Department of Commerce Technology Administration National Institute of Standards and Technology SPECIFICATIONS, TOLERANCES, AND OTHER TECHNICAL REQUIREMENTS FOR WEIGHING AND MEASURING. Under Secretary of Commerce for Technology National Institute of Standards and Technology William A. Jeffrey, Director NIST Handbook 44 2007 Edition Supersedes NIST Handbook 44, 2006. the assistance of the Weights and Measures Division (WMD) of the National Institute of Standards and Technology (NIST). This handbook includes amendments endorsed by the 91 st National Conference
- Xem thêm -

Xem thêm: NLST: United States Department of Commerce Technology Administration National Institute of Standard''''s and Measuring Devices potx, NLST: United States Department of Commerce Technology Administration National Institute of Standard''''s and Measuring Devices potx, NLST: United States Department of Commerce Technology Administration National Institute of Standard''''s and Measuring Devices potx, T.  Tolerances Applicable to Devices not Marked I, II, III, III L, or IIII, Standards of Length, Mass, and Capacity or Volume

Mục lục

Xem thêm

Gợi ý tài liệu liên quan cho bạn