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Program of Pattern Evaluation of Continuous Totalizing Automatic Weighing Instruments(Belt Weighers)
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JJF 1791-2019
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Standard similar to JJF 1791-2019 JJF 1033 JJF 1050 JJF 1030 Basic data | Standard ID | JJF 1791-2019 (JJF1791-2019) | | Description (Translated English) | Program of Pattern Evaluation of Continuous Totalizing Automatic Weighing Instruments(Belt Weighers) | | Sector / Industry | Metrology & Measurement Industry Standard | | Word Count Estimation | 107,140 | | Date of Issue | 2019 | | Date of Implementation | 2020-03-31 | | Issuing agency(ies) | State Administration for Market Regulation | JJF 1791-2019: Program of Pattern Evaluation of Continuous Totalizing Automatic Weighing Instruments(Belt Weighers)
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(Outline of Type Evaluation of Continuous Cumulative Automatic Weighing Apparatus)
National Metrology Technical Specifications of the People's Republic of China
Continuous cumulative automatic weighing instrument (belt scale)
Type evaluation outline
(BeltWeighers)
2019-12-31 released
2020-03-31 Implementation
Issued by the State Administration for Market Regulation
Continuous cumulative automatic weighing instrument (belt scale)
Type evaluation outline
(BeltWeighers)
Replace JJG195-2002
Medium type evaluation part
Focal point. National Weighing Instrument Metrology Technical Committee Automatic Weighing Instrument Sub-Technical Committee
Main drafting unit. Jiangsu Institute of Metrology
Qingdao Institute of Metrology Technology
Participated in the drafting. Nanjing Sanai Industrial Control Co., Ltd.
Saimo Electric Co., Ltd.
This specification entrusts the National Weighing Instrument Metrology Technical Committee to the Automatic Weighing Instrument Sub-Technical Committee to be responsible for interpretation
The main drafters of this specification.
Haitao Wang (Jiangsu Institute of Metrology)
Hu Qiang (Jiangsu Institute of Metrology)
Wang Junguo (Qingdao Institute of Metrology Technology)
Participating drafters.
Lu Qinsheng (Nanjing Sanai Industrial Control Co., Ltd.)
He Fusheng (Saimo Electric Co., Ltd.)
Jian Zhang (Jiangsu Institute of Metrology)
Chen Bin (Jiangsu Institute of Metrology)
table of Contents
Introduction (Ⅲ)
1 scope (1)
2 Reference documents (1)
3 Term (2)
3.1 General definition (2)
3.2 Structure (2)
3.3 Graduation value (3)
3.4 Indications and errors (3)
3.5 Weighing performance (4)
4 Overview (5)
5 Legal management requirements (5)
5.1 Unit of measurement(5)
5.2 Accuracy level (5)
5.3 Marks of measurement legal system and marking of measuring instruments (5)
6 Measurement requirements (6)
6.1 Classification of accuracy levels (6)
6.2 Representation of division value (7)
6.3 Minimum cumulative load (∑min) (7)
6.4 Minimum flow (Qmin) (8)
6.5 Warm-up time test requirements (8)
6.6 Requirements for simulation test of static load (8)
6.7 Field test error requirements (10)
7 General technical requirements (11)
7.1 Operational safety(11)
7.2 Cumulative display and printing device(12)
7.3 Semi-automatic zero-setting device and automatic zero-setting device(13)
7.4 Overload protection (13)
7.5 Package (13)
7.6 Environmental impact requirements (13)
7.7 Anti-interference performance(14)
7.8 Response to significant increase (14)
7.9 Indicator display test (14)
7.10 Warm-up time (14)
8 List of Type Evaluation Items (14)
8.1 Observation and verification items (14)
8.2 Test items (15)
9 The method of providing the prototype and the use of the prototype and technical information (16)
9.1 Methods of providing prototypes (16)
9.2 How to use the prototype (17)
9.3 Provide technical data for type evaluation test (17)
10 Test items (17)
10.1 Test equipment (17)
10.2 Technical data review (18)
10.3 Technical inspection (18)
10.4 General requirements for tests (18)
10.5 Metrology performance test (20)
10.6 Impact factor and interference test (23)
10.7 Metrological characteristic test (40)
10.8 Field test (42)
10.9 Site material test (44)
11 Treatment of type evaluation results (45)
Appendix A Table of Key Parts and Materials (46)
Appendix B Original Record of Type Evaluation (47)
Appendix C Symbol meaning (100)
Introduction
This type evaluation outline is revised in principle to adopt the International Recommendation OIMLR50 of the International Organization for Legal Metrology
2014 (E) Continuous Totalizing Automatic Weighing (Belt Scale) [ContinuousTotalizingAutomaticWeighing
Instrument (BeltWeighers)], for JJG195-2002 "Continuous Accumulative Automatic Weighing Instrument (Belt Weighers)"
The relevant type evaluation part was revised, and combined with the actual situation of the continuous cumulative automatic weighing instrument (belt scale) type evaluation in my country
However, the relevant type evaluation in JJG195-2002 "Continuous Accumulative Automatic Weighing Instrument (Belt Scale)" is still applicable.
Content.
The writing format refers to the requirements of JJF 1016-2014 "Guidelines for Compiling Guidelines for Type Evaluation of Measuring Instruments".
Compared with JJG195-2002 "Verification Regulations for Continuous Accumulative Automatic Weighing Apparatus (Belt Scale)", the main
The changes are as follows.
--- Deleted some terms;
---Deleted the content of the first verification and subsequent measurement management;
---According to the development status of belt scales, level 0.2 and related requirements have been added to the level of belt scales;
---The maximum allowable error of the impact factor test of the 0.5-level belt scale was changed from 0.18% to 0.175%;
---In the short-term stability test of the zero point, the minimum cumulative indication and the minimum value obtained by the 0.5-level belt scale in the 5 tests
The difference of the maximum cumulative indication value has been changed from 0.0013% to 0.00125%;
---In the long-term stability test of the zero point, the smallest cumulative value and the largest cumulative value among all the values before and after 3h
The difference of is changed from 0.0018% to 0.00175%;
---In the zero-load maximum deviation test, the deviation between the cumulative display value and the initial value is 0.18%
Changed to 0.175%;
---Added external power supply or adapter power supply device (AC or DC), non-rechargeable battery power supply
(DC) voltage change requirements;
---Added technical inspection requirements in 10.3;
---Added the "condensation" test in the "damp heat" test;
---Increase the surge (impact) immunity, radio frequency field induced conducted disturbance immunity test, modify the voltage
Technical indicators for dip, short-term interruption immunity test and radio frequency electromagnetic field radiation immunity test;
---Different application scope. It is clearly stated that this outline is only applicable to the type of continuous cumulative automatic weighing instrument (belt scale)
Evaluation, not applicable to initial verification, subsequent verification and in-use verification;
---Different content. Added Chapter 8 Type Evaluation Item List and Chapter 10 Type Evaluation Results Processing
Related content;
---Implemented JJF 1016-2014 "Guidelines for the Compilation of Type Evaluation Outline for Measuring Instruments" on the compilation format, adding
Added "Item List", "Type Evaluation Results Processing" and other content;
---Added Appendix A key parts list;
---Added Appendix B verification items, verification requirements, verification content and verification results for anti-fraudulent use;
---The meaning of the symbols in Appendix C has been added.
JJF 1791-2019 "Continuous cumulative automatic weighing instrument (belt scale) type evaluation outline" all previous editions
The situation is.
---JJG195-2002.
Continuous cumulative automatic weighing instrument (belt scale)
Type evaluation outline
1 Scope
This type evaluation outline is applicable to the type of continuous accumulative automatic weighing instrument whose classification code is 12061000.
Evaluation. It specifies the legal management requirements, measurement requirements, technical requirements and technical requirements for continuous cumulative automatic weighing instruments (belt scales).
Test requirements and test procedures for type evaluation.
This outline applies to the following types of belt scales.
---A belt scale that uses the principle of gravity to determine the mass of accumulated bulk materials by continuous weighing;
---Belt scale used with single speed belt conveyor or variable speed belt conveyor.
2 Reference documents
JJG99 weight
JJF 1181 Weighing instrument measurement terms and definitions
GB/T 2423.1-2008 Environmental testing of electric and electronic products Part 2.Test method Test A.
Low temperature
GB/T 2423.2-2008 Environmental testing of electric and electronic products Part 2.Test method Test B.
high temperature
GB/T 2423.3-2016 Environmental testing of electric and electronic products Part 2.Test method test
Cab. Constant humidity test
GB/T 2423.4-2008 Environmental testing of electric and electronic products Part 2.Test method Test Db
Alternating damp heat (12h 12h cycle)
GB/T 2424.1-2015 Environmental Testing Part 3.Supporting Documents and Guidelines for Low and High Temperature Testing
GB/T 2424.2-2005 Electrical and electronic products environmental test damp heat test guide
GB/T 17214.2-2005 Working conditions of industrial process measurement and control equipment Part 2 Power
GB/T 17626.1-2006 Electromagnetic compatibility test and measurement technology immunity test summary
GB/T 17626.2-2018 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test
GB/T 17626.3-2016 Electromagnetic compatibility test and measurement technology Radio frequency electromagnetic field radiation immunity test
GB/T 17626.4-2018 Electromagnetic compatibility test and measurement technology Electrical fast transient pulse group immunity
test
GB/T 17626.5-2019 Electromagnetic compatibility test and measurement technology surge (impact) immunity test
GB/T 17626.6-2017 Electromagnetic compatibility test and measurement technology Radio frequency field induced conducted disturbance
Immunity
GB/T 17626.11-2008 Electromagnetic compatibility test and measurement technology Voltage sag, short-term interruption and voltage
Varying immunity test
GB/Z 18039.5-2003 electromagnetic compatibility environment public power supply system low-frequency conduction disturbance and signal transmission
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