JJG 46-2018 English PDF

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JJG 46-2018: Torsion Balance
Status: Valid

JJG 46: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JJG 46-2018	329	Add to Cart	3 days	Torsion Balance	Valid
JJG 46-2004	479	Add to Cart	3 days	Verification Regulation of Torsion Balance	Obsolete
JJG 46-1976	199	Add to Cart	2 days	Torsion Balance	Obsolete

Similar standards

GB/T 36126   JJG 139   GB/T 1885   JJG 52   JJG 49   JJF 046   

Basic data

Standard ID: JJG 46-2018 (JJG46-2018)
Description (Translated English): Torsion Balance
Sector / Industry: Metrology & Measurement Industry Standard
Classification of Chinese Standard: A53
Word Count Estimation: 14,196
Date of Issue: 2018-12-25
Date of Implementation: 2019-06-25
Older Standard (superseded by this standard): JJG 46-2004
Regulation (derived from): State Administration of Markets, Announcement No. 34 of 2018
Issuing agency(ies): State Administration for Market Regulation

JJG 46-2018: Torsion Balance

---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.
(Torque balance verification procedure) National Metrology Verification Regulations of the People's Republic Torque balance TorsionBalance Published on.2018-12-25 2019-06-25 implementation State Market Supervisory Administration released Torque balance verification procedure Replace JJG 46-2004 Focal Point. National Quality Density Measurement Technical Committee Main drafting unit. China Institute of Metrology Xinjiang Institute of Metrology and Testing Participated in drafting unit. Shanghai Institute of Metrology and Testing Technology This regulation entrusts the National Quality Density Measurement Technical Committee to explain The main drafters of this procedure. Yao Hong (China Institute of Metrology) Xu Qiusha (Xinjiang Metrology and Testing Institute) Participate in the drafters. Su Shi (Shanghai Institute of Metrology and Testing Technology) Jiao Kai (China Institute of Metrology)

table of Contents

Introduction II 1 Scope 1 2 References 1 3 terms and units of measurement 1 3.1 Term 1 3.2 Unit of measurement 1 4 Overview 1 5 Metrology performance requirements 2 5.1 Basic parameters 2 5.2 Metrology performance 2 6 General technical requirements 3 6.1 Appearance 3 6.2 Structural requirements 3 7 measuring instrument control 3 7.1 Verification conditions 3 7.2 Verification project 4 7.3 Verification method 4 7.4 Processing of verification results 5 7.5 Verification cycle 5 Appendix A Torque Balance Verification Original Record Format 6 Appendix B Torque Balance Verification Certificate Page 7 Appendix C Torque Balance Verification Result Notice Page Format 8

Introduction

JJG 46 "Torque Balance" adopts the accuracy level in the current JJG 98 "Mechanical Balance", retaining the original Level, and refer to its technical indicators and requirements, modify JJG 46-2004 "Torsion Balance". Compared with JJG 46-2004, in addition to editorial changes, the main technical changes are as follows. --- Add "cited literature" and "terms and units of measurement" section; --- Added a map of the torsion balance in the overview; --- Modified 3.1 basic parameters; --- Removed the 3.3 accuracy level; --- Deleted Table 1, changed to text description Table 1 content; ---Modified the "maximum allowable error" table for the "no-load indication repeatability" requirement, changed from "≤0.5e" Is "≤1e"; --- Deleted Table 4, changed to a general description of the calibration scale weight; ---Modify "loading and unloading value repeatability" to "full load indication repeatability"; --- According to the description of the text, the corresponding record form and the format of the certificate page are modified. The previous versions of this procedure are released as follows. ---JJG 46-2004; ---JJG 46-1976. Torque balance verification procedure

1 Scope

This procedure applies to the first verification, subsequent verification and use of precision torsion balances (hereinafter referred to as "balances"). an examination.

2 reference files

JJG 98 mechanical balance JJF1229 Quality Densitometry Terms and Definitions OIMLR76-1.2006 Non-automatic weighing instruments - Part 1. Measurements and technical requirements test (Non-auto- maticweightinginstruments-Part 1.Metroologicalandtechnicalrequirements-Tests) For dated references, only the dated version applies to this Code; any undated quotation The latest version (including all amendments) applies to this procedure.

3 terms and units of measure

3.1 Terms 3.1.1 Sensitivity sensitivity When the reading pointer moves a verification index value e, the deviation between the verification pointer and the verification mark is verified. 3.1.2 weight conversion quality value conventionalmassvalueofweight When the weight is balanced with a standard weight of a predetermined density in the air of the agreed temperature and the agreed density, the standard The quality of the standard weight. 3.1.3 actual scale value (d) actualscaleinterval The difference between the values corresponding to the two adjacent ruler marks. 3.1.4 verification scale value (e) verificationscaleinterval The value expressed in mass units used to characterize and classify the instrument. 3.1.5 Verification of the number of divisions (n) numberofverificationscaleintervals Measure the ratio of the maximum weighing Max of the instrument to the verification index value e, n= Max 3.2 Unit of measurement The mass unit used for the balance is. milligrams (mg).

4 Overview

The main structure of the balance is composed of a single-arm lever and a combination of two elastic elements, a flat coil spring and a leaf spring. The weight is simply rotated by the reading knob and the balance torque generated by the deflection angle of the elastic element is used for the measurement. In the horizontal One end of the beam is equipped with a quick stop damper, so that the beam swing can be stopped in a few seconds, so that it can be quickly read and measured. Value. ......

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