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GB/T 30712-2014: Provision of permissible errors for measurement of polished diamond mass
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 30712-2014 | English | 149 |
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Provision of permissible errors for measurement of polished diamond mass
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GB/T 30712-2014
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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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