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JJG 649-2016 English PDF

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JJG 649-2016: Digital Weighing Indicators (Weighing Indicators)
Status: Valid

JJG 649: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 649-2016	English	559	Add to Cart	4 days [Need to translate]	Digital Weighing Indicators (Weighing Indicators)	Valid	JJG 649-2016
JJG 649-1990	English	599	Add to Cart	3 days [Need to translate]	Verification Regulation for Digital Weighing Indicator	Obsolete	JJG 649-1990

PDF similar to JJG 649-2016

Standard similar to JJG 649-2016

GB/T 36126 JJG 646 GB/T 1885 JJG 655 JJG 648 JJG 640

Basic data

Standard ID	JJG 649-2016 (JJG649-2016)
Description (Translated English)	Digital Weighing Indicators (Weighing Indicators)
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A53
Classification of International Standard	17.100
Word Count Estimation	24,217
Date of Issue	2016-06-27
Date of Implementation	2016-12-27
Older Standard (superseded by this standard)	JJG 649-1990
Quoted Standard	JJG 99; JJF 118; OIML R76-2006
Regulation (derived from)	Notice of the General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China 2016 No.16
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine
Summary	This standard applies to the calibration of digital weighing displays for non-automatic weighing instruments of three and four levels of accuracy.

JJG 649-2016: Digital Weighing Indicators (Weighing Indicators)

---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.
Digital Weighing Indicators (Weighing Indicators) National Metrological Verification Regulation of the People's Republic of China Digital weighing indicator (weighing indicator) 2016-06-27 released 2016-12-27 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Digital weighing indicator (weighing Indicator) verification procedures WeighingIndicators (WeighingIndicators) Replacing JJG 649-1990 Responsible unit. National Weighing Measurement Technology Committee The main drafting unit. Shandong Institute of Metrology Inner Mongolia Autonomous Region Metrology and Testing Institute Participated in the drafting unit. Shaanxi Institute of Metrology Shanghai Yaohua Weighing System Co., Ltd. Jiangsu Institute of Metrology This procedure entrusts the National Weighing Metrology Technical Committee to explain The main drafters of this procedure. Lu Xinguang (Shandong Institute of Metrology) Shi Li (Shandong Institute of Metrology) Wen Xianguang (Inner Mongolia Autonomous Region Measurement and Testing Institute) Participate in the drafters. XU Qian-yu (Shaanxi Institute of Metrology) Zhang Hongshe (Shanghai Yaohua Weighing System Co., Ltd.) Liu Wei (Jiangsu Institute of Metrology)

Introduction (Ⅲ) 1 Scope (1) 2 References (1) 3 Terminology (1) 3.1 digital weighing indicator (weighing indicator) (1) 3.2 Error distribution coefficient (1) 3.3 Signal voltage (1) 3.4 Minimum input voltage (1) 3.5 Maximum input voltage (1) 3.6 Measuring range Minimum voltage (2) 3.7 Measuring range Maximum voltage (2) 3.8 Minimum load impedance (2) 3.9 Maximum load impedance (2) 3.10 load cell simulator (2) 3.11 zero (2) 3.12 Extended display device (2) 3.13 Impedance simulator (2) 3.14 Actual index value of the indicator (2) 3.15 Indicator rating of the indicator (2) 3.16 Test division number (2) 3.17 test scale value (2) 3.18 The minimum input signal voltage corresponding to each calibration scale value (2) 4 Overview (2) 5 Metrological performance requirements (3) 5.1 Accuracy class (3) 5.2 Classification of Accuracy Level (3) 5.3 Verification scale value eind (3) 5.4 Additional requirements for multi-index indicator (3) 5.5 Maximum permissible error (3) 5.6 Zero Accuracy (4) 5.7 Repeatability (4) 6 General technical requirements (4) 6.1 Security (4) 6.2 Extended indicating device (4) 6.3 Indicators of results (4) 6.4 Zero device and zero point tracking device (5) 6.5 Metrics and illustrations (5) 7 Metering device control (5) 7.1 Test conditions (5) 7.2 Verification Items and Verification Methods (7) 8 processing of test results (8) 9 test cycle (8) Appendix A Error calculation method (9) Appendix B Verification Record Format (Recommended) (13) Appendix C Verification Certificate Page Format (Recommended) (15) Appendix D Test results Notification page format (recommended) (17) Appendix E Abbreviations and Symbols (18)

Introduction

This procedure is a revision of the JJG 649-1990 "digital weighing display" verification procedure. The JJF1002-2010 "Rules for the Preparation of National Metrological Verification Regulations" was implemented in the preparation format. versus JJG 649-1990 compared to the editorial changes in the main changes are the following. --- increase the content of the term (3); --- Accuracy level is expressed in terms of 3, 4 and 4 levels of accuracy (5.1); - to determine the degree of accuracy by dividing the degree of classification, abolish the correlation between the original procedure and the accuracy level of the instrument (5.2); --- The maximum allowable error replaces 0.7 times the original rule (5.5) with a multiple of the error distribution coefficient pind; --- increase the measurement of legal signs and illustrative logo (6.5); --- increase the load cell and other testing equipment (7.1.1); - the unit of measurement using a dimensionless unit, to replace the original procedures to the quality of units for the measurement unit. --- delete response time test items; --- remove the warm-up time technical requirements; - delete safety performance requirements and their verification methods; --- remove anti-jamming performance test related content; --- remove the identification, temperature, power supply test items; - Added Appendix A error calculation method; - Added Appendix B Verification Record Format (Recommended); - Added Appendix C Verification certificate page format; --- increase the Appendix D test results notice page format; --- Add Appendix E abbreviations and symbols. This procedure has been published in the following circumstances. --- JJG 649-1990 "digital weighing indicator". Digital weighing indicator (weighing indicator) verification procedures

1 Scope

This procedure applies to the accuracy of the level of non-automatic weighing digital weighing display of the test. Note. digital weighing indicator, also known as the weighing indicator, hereinafter referred to as the indicator.

2 reference file

This procedure refers to the following documents. JJG 99 weight JQF1181 Weighing Terms and Definitions OIMLR76..2006 (E) "Non-automaticweighinginstruments" The terms of the above documents are the terms of this Code by reference to this Code. Any reference to the date of the text , Only the date of the version applies to this order; any reference to the date of the document, the latest version (including all Of the amendments) apply to this procedure.

3 terminology

JJF1181 "Terms and Definitions for Weighing Metrology Terms" and OIMLR76 "Non-Automatic Weighing" The following terms apply to this procedure. The output signal of the counterweight sensor in the instrument is subjected to analog-to-digital conversion (optional) and further data processing, An electronic device for weighing the results. Habitually divided into digital and analog two. The indicator for receiving the digital signal is a digital weighing indicator, and the indicator for receiving the analog signal is an analog weighing Indicator. Note. Both the digital weighing indicator or the analog weighing indicator are in digital form. 3.2 error allocation coefficient apportioningfactorofmpe (pind) Is the error distribution coefficient of the indicator, which is multiplied by the maximum allowable error of the proposed instrument. The difference. 3.3 Signal voltage signalvoltage The voltage at the receiving end of the analog indicator signal is input. 3.4 Minimum input voltage minimuminputvoltage (Umin) The minimum simulated static load signal value of the indicator, the allowable input generated by the carrier and still meet the requirements of this procedure Is equivalent to the minimum value of the voltage output from the load cell when the instrument is unloaded. 3.5 Maximum input voltage maximuminputvoltage (Umin) The indicator reaches the maximum test division number nind corresponding to the signal voltage value that is allowed to enter and still be able to meet this procedure The required input signal voltage.

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