GB/T 30712-2014 English PDF

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GB/T 30712-2014: Provision of permissible errors for measurement of polished diamond mass
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 30712-2014	149	Add to Cart	2 days	Provision of permissible errors for measurement of polished diamond mass	Valid

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GB/T 16552   GB/T 5195.12   SN/T 0481.7   GB/T 45611   GB/T 30714   GB/T 30713   

Basic data

Standard ID: GB/T 30712-2014 (GB/T30712-2014)
Description (Translated English): Provision of permissible errors for measurement of polished diamond mass
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: D59
Classification of International Standard: 39.060
Word Count Estimation: 5,569
Date of Issue: 6/9/2014
Date of Implementation: 10/1/2014
Quoted Standard: GB 11887; GB/T 16554
Regulation (derived from): National Standards Bulletin No. 11 of 2014
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the quality of polished diamonds measuring tolerance requirements, test methods and labeling. This standard applies to trading and settlement of Quality Supervision quality polished diamonds. This standard applies to mass greater t

GB/T 30712-2014: Provision of permissible errors for measurement of polished diamond mass

---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.
Provision of permissible errors for measurement of polished diamond mass ICS 39.060 D59 National Standards of People's Republic of China Polished quality measurement tolerances specified Issued on. 2014-06-09 2014-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by the People's Republic of China Ministry of Land Resources. This standard by the National Standardization Technical Committee jewelery (SAC/TC298) centralized. This standard was drafted. Tianjin Product Quality Supervision and Detection Technology Research Institute, Shenzhen Churaumi gold jewelery Limited. The main drafters of this standard. Caowei Yu, Cui Jianjun, Kong Wei, Ma Guofu, Wang Wan, Li Peng, Zheng Yanying, Meng Jianhua. Polished quality measurement tolerances specified

1 Scope

This standard specifies the quality of polished diamonds measuring tolerance requirements, test methods and labeling. This standard applies to trading and settlement of Quality Supervision quality polished diamonds. This standard applies to mass greater than or equal to 0.0400g (0.20ct) single grain of polished diamonds; mass of less than 0.0400g (0.20ct) of Single grain and polished diamond inlay group, batch settlement polished diamonds can be performed with reference to this standard.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB 11887 jewelry precious metal purity and designation GB/T 16554 Diamond Grading

3 Terms and Definitions

GB/T 16554 and defined by the following terms and definitions apply to this document. 3.1 Label rate markingmassofdiamond Quality marked polished diamonds and jewelry identification, notes, etc., in grams (g) as a unit. 3.2 The actual amount actualmassofdiamond 5.2.2 based on the quality of the resulting polished diamonds measured in grams (g) as a unit. 3.3 Quality measurement tolerance permissibleerrorsofdetermination Between the actual quantity and quality of polished diamonds labeled amount allowable deviation limit.

4 quality measurement tolerance requirements

Quality measurement tolerance ± 0.0010g (0.005ct).

5 Test methods

5.1 Measurement conditions 5.1.1 Place the balance environment shall comply with the metrological requirements. 5.1.2 scales should be used in the test cycle. 5.1.3 Use should do first check metering performance, then routine operation. 5.1.4 Test requirements for balance. ......

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