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JJF 1834-2020 English PDF

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JJF 1834-2020: General technical requirements of Non-automatic Weighing Instruments
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Basic data

Standard ID JJF 1834-2020 (JJF1834-2020)
Description (Translated English) General technical requirements of Non-automatic Weighing Instruments
Sector / Industry Metrology & Measurement Industry Standard
Classification of Chinese Standard A53
Classification of International Standard 17.100
Word Count Estimation 183,151
Date of Issue 2020
Date of Implementation 2020-04-17
Issuing agency(ies) State Administration for Market Regulation

JJF 1834-2020: General technical requirements of Non-automatic Weighing Instruments

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(General technical requirements for non-automatic weighing instruments) National Metrology Technical Specifications of the People's Republic of China General technical requirements for non-automatic weighing instruments 2020-01-17 released 2020-04-17 implementation Issued by the State Administration for Market Regulation General technical requirements for non-automatic weighing instruments Replace JJG555-1996 Focal point. National Technical Committee of Weighing Apparatus and Metrology Main drafting unit. China Institute of Metrology Beijing Institute of Metrology and Testing National Railway Weighing Station Participated in the drafting. Jiangxi Institute of Metrology and Testing This specification entrusts the National Weighing Instrument Metrology Technical Committee to be responsible for interpretation The main drafters of this specification. Hu Manhong (China Institute of Metrology) Liu Wei (Beijing Institute of Metrology and Testing Science) An Aimin (National Railway Scale Measuring Station) Participating drafters. Yang Qiqi (Jiangxi Institute of Metrology and Testing)

table of Contents

Introduction (Ⅳ) 1 scope (1) 2 Reference documents (1) 3 Term (1) 3.1 General terms (1) 3.2 The structure of the weighing instrument (3) 3.3 Measurement characteristics of weighing instruments (8) 3.4 Measurement performance of weighing instruments (10) 3.5 Indication and error (10) 3.6 Influence and reference conditions (14) 3.7 Performance test (14) 4 Overview (14) 4.1 Unit of measurement(14) 4.2 Principles of measurement requirements (14) 4.3 Principles of technical requirements (15) 4.4 Applicability of requirements (15) 5 Measurement requirements (15) 5.1 Accuracy classification principle (15) 5.2 Classification of accuracy grades of weighing instruments (16) 5.3 Additional requirements for multi-division weighing instruments (16) 5.4 Auxiliary indicating device (17) 5.5 Maximum allowable error(19) 5.6 Tolerance between weighing results (19) 5.7 Test standard device (20) 5.8 Discrimination (20) 5.9 Changes caused by influence and time (21) 5.10 Type evaluation test and inspection (23) 6 Technical requirements for self-indicating or semi-self-indicating weighing instruments (28) 6.1 General requirements for structure(28) 6.2 Indication of weighing result (30) 6.3 Analog indicating device (31) 6.4 Digital indicating device(33) 6.5 Zero setting device and zero tracking device(34) 6.6 Tare device (35) 6.7 Pre-set tare device (39) 6.8 Locked state (39) 6.9 Auxiliary verification device (detachable or fixed) (39) 6.10 Selection of weighing range of multi-range weighing instrument (40) 6.11 The choice between different load carriers and/or load transfer devices and different load measuring devices (or Switching) device (40) 6.12 "Positive and negative" comparative weighing instrument (40) 6.13 Weighing instruments sold directly to the public (41) 6.14 Additional requirements for pricing instruments sold directly to the public (42) 6.15 Similar to ordinary weighing instruments sold directly to the public (44) 6.16 Price label weighing instrument(44) 6.17 Mechanical counting instrument with unit weight carrier (44) 6.18 Additional technical requirements for mobile weighing instruments (44) 6.19 Portable road vehicle weighing instrument (45) 6.20 Operation mode (46) 7 Technical requirements for electronic weighing instruments (46) 7.1 General requirements(46) 7.2 Response to significant increase (47) 7.3 Functional requirements (47) 7.4 Performance test and range stability test (48) 7.5 Additional requirements for software-controlled electronic devices (48) 8 Technical requirements for non-self-indicating weighing instruments (53) 8.1 Minimum sensitivity (53) 8.2 Solutions that can be taken by the indicating device (53) 8.3 Structural conditions (54) 8.4 Single equal beam (55) 8.5 1/10 single arm ratio beam (55) 8.6 Single-stroke weight scale (lever) (55) 8.7 Roberwell Weighing Apparatus and Browne Weighing Apparatus (56) 8.8 Proportional platform weighing instrument(57) 8.9 Weighing instrument (lever type) with a load measuring device with a movable ball (57) 9 Marking of weighing instruments and modules (58) 9.1 Illustrative signs (58) 9.2 Verification mark (61) 10 Measurement Management (61) 10.1 Type evaluation (61) 10.2 First Verification (64) 10.3 Follow-up verification and in-use inspection (64) Appendix A Non-automatic weighing instrument test procedure (mandatory requirement) (65) Appendix B Additional tests for electronic weighing instruments (mandatory requirements) (77) Appendix C Test and report of weighing indicator and analog data processing device module (for individual test Mandatory requirements for modules) (84) Appendix D Tests and reports of digital data processing devices, terminals and digital display modules for non-automatic weighing instruments (Mandatory requirements for individually tested modules) (93) Appendix E Tests and reports of non-automatic weighing instrument weighing modules (mandatory for separately tested modules Request) (97) Appendix F Non-automatic weighing instrument module compatibility check (mandatory requirements for separately tested modules) (100) Appendix G Additional inspections and tests for software-controlled digital devices and weighing instruments (for software-controlled digital devices) Mandatory requirements for devices and weighing instruments) (113) Appendix H Non-automatic weighing instrument test report format (115)

Introduction

The technical requirements of JJF 1834-2020 "General Technical Requirements for Non-Automatic Weighing Instruments" are equivalent to the adoption of international legal measurement Organization (OIML) International Recommendation OIMLR76-1..2006 "Non-automatic weighing instrument Part 1.Measurement and technical requirements Testing” (Non-AutomaticWeighingInstrument Part 1.MetrologicalandTechnical Requirement-Test), OIMLR76-2.2007 "Non-Automatic Weighing Apparatus Part 2.Test Report" (Non- AutomaticWeighingInstrument Part 2.TestReportFormat). Appendix A and Appendix of this specification Record B, Appendix C, Appendix D, Appendix E, Appendix F, Appendix G, Appendix H are all normative appendices. The legal management requirements, measurement requirements, and general technical requirements specified in the "General Technical Requirements for Non-Automatic Weighing Instruments" The terms of the test methods and test conditions for the test items replaced the JJG555-1996 "General Inspection of Non-Automatic Scales" The relevant provisions of the "Regulations". Compared with JJG555-1996 "General Verification Regulations for Non-Automatic Scales", this specification mainly There are the following differences. ---In the terms of 5.1 accuracy classification principle, etc., the meter of class and class non-automatic weighing instrument has been added. Technical requirements and test procedures; ---Introduced the definition of non-automatic weighing instrument module (see 3.2.2) and the relevant technical requirements and test Inspection procedures; --- Added the definition of "family" (see 3.3.5) and the test of the family of weighing instruments or modules (see 5.10.4); ---Added Appendix F about the compatibility check of non-automatic weighing instrument modules; ---Added software terms including type-specific parameters, device-specific parameters, software segmentation, etc. (see 3.2.8), and additional requirements for software-controlled digital devices and weighing instruments (see 7.5) and additional inspections in Appendix G And test; ---Updated the anti-interference performance test requirements (see Appendix B.3), including AC power supply voltage sag and short-term medium The test requirements for the immunity test of broken and radiated electromagnetic fields have been added to the test requirements for the immunity of the conducted radio frequency field; ---Added multi-range weighing instrument terminology and related measurement technical requirements; ---Deleted rotation and swing measurement and test requirements; --- Deleted the transport packaging test requirements including packaging drop, packaging vibration, packaging collision, etc.; ---Deleted electrical safety test requirements including insulation resistance, leakage current, etc.; ---Modified the scope of application of durability test. The release status of previous versions of this specification. ---JJG555-1996. General technical requirements for non-automatic weighing instruments

1 Scope

This specification clarifies the measurement requirements and technical requirements for non-automatic weighing instruments. This specification aims to provide standardized requirements and test procedures to evaluate non-automatic weighing instruments in a uniform and traceable method Metering performance and technical characteristics. This specification is applicable to the type evaluation of non-automatic weighing instruments, and makes the first verification, subsequent verification and in-use inspections. The principle stipulates that in actual operation, if other types of evaluation outlines and metrological verification procedures cannot be covered by the legal metrological requirements or If it is inconsistent with the technical requirements of this specification, this specification shall prevail. The classification code of non-automatic weighing instruments is 12040000.

2 Reference documents

JJG669 load cell JJG99 weight OIMLR76-1.2006 Non-automatic weighing instrument Part 1.Measurement and technical requirements test (Non-Au- tomaticWeighingInstrument Part 1.MetrologicalandTechnicalRequirement-Test) OIMLR76-2.2007 Non-Automatic Weighing Apparatus Part 2.Test Report (Non-Automatic WeighingInstrument Part 2.TestReportFormat) For dated reference documents, only the dated version applies to this specification; for undated references The latest version (including all amendments) is applicable to this specification.

3 term

3.1 General terms 3.1.1 Weighing instrument A measuring instrument that determines the mass of an object by the gravity acting on the object. Note. According to the provisions of R111 and D28, the "mass" (or "weight value") in this specification is more appropriate to express "converted quality" “Weight” or “the agreed value of weighing results in the air”, and “weight” is a more suitable form of concrete expression of quality (Equivalent to physical measuring tools), its physical and measurement characteristics have clear regulations. Weighing instruments can also be used to determine quantities, sizes, parameters, or characteristics related to quality. According to the operation mode, the weighing instrument can be divided into automatic weighing instrument (AWI) and non-automatic weighing instrument (NAWI). 3.1.2 Non-automatic weighing instrument; NAWI A weighing instrument that requires operator intervention during the weighing process to determine whether the weighing result is acceptable. Note 1.The process of determining whether the weighing result is acceptable, including any human activities taken by the operator that affect the weighing result, For example, actions taken when the indication is stable or the load is adjusted, and whether to accept the observed weighing result Display value or whether to print out, etc. Determine whether the weighing result is acceptable, including the

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