JJG 1171-2019 English PDF

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JJG 1171-2019: Concrete Batching Scales
Status: Valid

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Basic data

Standard ID: JJG 1171-2019 (JJG1171-2019)
Description (Translated English): Concrete Batching Scales
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Classification of International Standard: 17.100
Word Count Estimation: 19,116
Date of Issue: 2019
Date of Implementation: 2020-03-31
Issuing agency(ies): State Administration for Market Regulation

JJG 1171-2019: Concrete Batching Scales

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Verification Regulation of Concrete Batching Scale) National Measurement Verification Regulations of the People's Republic of China Concrete batching scale Published on December 31,.2019 2020-03-31 Implementation Issued by the State Administration of Market Supervision and Administration Verification Regulation of Concrete Batching Scale Centralized unit. National Weighing Measurement Technical Committee Automatic Weighing Sub-Technical Committee Main drafting unit. Qingdao Institute of Metrology and Technology Chinese Academy of Metrology Shandong Institute of Metrology Hechi Metrology and Testing Institute Participated in the drafting unit. Shandong Boshuo Electronics Co., Ltd. Qingdao New Construction Machinery Co., Ltd. This regulation is entrusted to the National Weighing and Metering Technical Committee Automatic Weighing Sub-Technical Committee for interpretation The main drafters of this regulation. Wang Junguo (Qingdao Metrology Research Institute) Tang Yu (Chinese Academy of Metrology) Song Shugu (Qingdao Metrology Research Institute) Lu Xinguang (Shandong Institute of Metrology) Wu Jinlong (Hechi Metrology and Testing Institute) Participating drafters. Huang Xiangting (Shandong Boshuo Electronics Co., Ltd.) Han Tinghai (Qingdao New Construction Machinery Co., Ltd.)

table of Contents

Introduction (Ⅱ) 1 Scope (1) 2 References (1) 3 Terms and units of measurement (1) 3.1 Terminology (1) 3.2 Unit of measurement (2) 4 Overview (2) 5 Measurement performance requirements (2) 5.1 Accuracy class (2) 5.2 Maximum allowable error (2) 5.3 Index value (d) (3) 5.4 Minimum weighing (Min) (3) 5.5 Zero setting (3) 5.6 Repeatability (3) 5.7 Discrimination (3) 6 General technical requirements (3) 6.1 Measurement security (3) 6.2 Indication device and printing device (3) 6.3 Weighing unit (3) 6.4 Installation (4) 6.5 Descriptive signs (4) 6.6 Verification mark (4) 7 Control of measuring instruments (4) 7.1 Verification conditions (4) 7.2 Verification items (6) 7.3 Verification method (6) 7.4 Processing of verification results (8) 7.5 Verification period (8) Appendix A Verification Record Format (Recommended) (9) Appendix B. Internal page format of certification certificate (recommended) (12) Appendix C Format of the inner pages of the notice of verification results (recommended) (13)

Introduction

The preparation of this regulation is based on the actual situation of my country's concrete batching scale, referring to GB/T 10171-2016 Related technical requirements and OIMLR612004 (E) of "Construction Machinery and Equipment Concrete Mixing Station (Building)" Relevant content of "Automatic Gravity metric weighing instruments" (according to JJF1002-2010 "National Metrology Verification Regulations Writing Rules" rules. This regulation is issued for the first time. Verification Regulation of Concrete Batching Scale

1 Scope

This regulation is applicable to the first verification, subsequent verification and in-use inspection of the concrete batching scale in automatic weighing mode. The concrete batching scale in this specification does not include the batching system of continuous concrete mixing plants (buildings).

2 Reference documents

This regulation refers to the following documents. JJF1181 Terms and Definitions of Weighing Instruments GB/T 10171-2016 Construction machinery and equipment concrete mixing plant (building) OIMLR612004 (E) Gravity automatic filling scale [Automaticgravimetricfilingin- struments] For dated references, only the dated versions are applicable to this Regulation; for those without dates The latest version (including all amendments) is applicable to this regulation.

3 Terms and units of measurement

3.1 Terminology The terms used in this regulation are consistent with JJF1181, and some terms are cited for ease of use and understanding. And added special terminology only applicable to this regulation. 3.1.1 Automatic gravity weighing instrument (quantitative automatic weighing instrument) automaticgravimetricfiling instrument(quantitativeautomaticweighinginstrument) The bulk material is divided into pre-determined and practically constant-quality loads, and the loads are loaded into the container's automatic weighing instrument. 3.1.2 Concrete batching scales With one or more weighing units to quantify one or more bulk materials (aggregate, powder and liquid) Weighing, forming separate loads with predetermined mass and independent of each other, and outputting and displaying these separate loads And (or) automatic weighing instruments that print these load indications. Note. The concrete batching system is composed of multiple batching scales, such as a concrete mixing plant. 3.1.3 Weighing unit In an automatic weighing instrument, a device that provides weighing information for a load. 3.1.4 Loading fil The combination of one or more separate loads constitutes a predetermined mass. 3.1.5 preset value In order to specify the nominal value of the charge, it is preset by the operator with the aid of the charge setting device and expressed in mass units Value. 3.1.6 Maximum permissible preset error (MPSE) maximum permissible preset value error ......

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