GB/T 17764-2008 English PDF

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GB/T 17764-2008: Hydrometers -- Principles of construction and adjustment
Status: Valid

GB/T 17764: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 17764-2008	174	Add to Cart	3 days	Hydrometers -- Principles of construction and adjustment	Valid
GB/T 17764-1999	239	Add to Cart	2 days	Principles of construction and adjustment of glass hydrometers	Obsolete

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Basic data

Standard ID: GB/T 17764-2008 (GB/T17764-2008)
Description (Translated English): Hydrometers -- Principles of construction and adjustment
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 9,922
Date of Issue: 2008-09-18
Date of Implementation: 2009-09-01
Older Standard (superseded by this standard): GB/T 17764-1999
Quoted Standard: ISO 1768
Adopted Standard: ISO 387-1977, IDT
Regulation (derived from): Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall)
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 provides a variety of glass used to measure the density of the liquid density meter calibration structure and principles. This standard is used without a thermometer, hydrometer glass hydrometer. This standard applies to all kinds of glass used to measure the density of the liquid density meter.

GB/T 17764-2008: Hydrometers -- Principles of construction and adjustment

---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.
Hydrometers. Principles of construction and adjustment ICS 13.300 A80 National Standards of People's Republic of China GB/T 17764-2008/ISO 387. 1977 Replacing GB/T 17764-1999 Structure and principles of density meter calibration (ISO 387. 1977, IDT) Posted 2008-09-18 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard corresponds to ISO 387. 1977 "--- densitometer calibration structure and principles" and ISO 387 is equivalent to the degree of consistency. This standard replaces GB/T 17764-1999 "glass hydrometers density meter structure and alignment principles." This standard compared with GB/T 17764-1999 main changes are as follows. --- This standard increased "relative density" (see 3.2) interpretation; --- The standard increase the surface tension affect the technical content of densitometer used (see Chapter 5 and Appendix A); --- This standard adds densitometer basic explanation of scale (see Appendix B). Appendix A of this standard is a normative appendix, Appendix B is an informative annex. This standard by National Instrument Standardization Technical Committee on Glass (SAC/TC178) centralized. This standard was drafted. People's Republic of China Guangdong Entry-Exit Inspection and Quarantine Bureau, China National Light Industry Product Quality Supervision and Inspection glass center. The main drafters of this standard. Song Wu Yuan, Chen Qiang, Yuan Chunmei, Xiaoda Hui, Lee Jun, ZHOU Ming-hui, Liu Jianbin, Ye Liang, Liang Meiqiong, Yueda Lei, Liu Yingfeng. This standard replaces the standards previously issued as follows. --- GB/T 17764-1999. GB/T 17764-2008/ISO 387. 1977 Structure and principles of density meter calibration

1 Scope

This standard specifies the structure and principles of calibration for various liquid glass density measurement density meter. This standard is used for the glass hydrometer density meter without a thermometer. This standard applies to all kinds of glass used to measure the density of a liquid density meter.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. ISO 1768 conventional numerical density meter --- glass volume expansion coefficient (for the development of liquid measurement table)

3 Terms and Definitions

3.1 3.1.1 scales should kilograms per cubic meter (kg/m3) in units of the indicated density (mass per unit volume). Grams per cubic centimeter (g/cm3) is One can accept the International System of Units (SI) units. NOTE. Appendix B explains the basic use density as a density meter scale advantages. 3.1.2 is not recommended for use is not based on the density scale. But allows the relative density of the water-based as scale, because it The relative density of species of scale unit widely used in national trade. 3.2 Where. ρ1 --- liquid density at a given temperature conditions T1; ρ2 --- under the conditions at a given temperature T2 density of pure water. 3.3 3.3.1 Standard reference temperature predetermined density meter should be 20 ℃. Note. Under certain environmental conditions, standard temperature densitometer can also choose 15 ℃ or 27 ℃. As tropical areas, the ambient temperature is always higher than 20 ℃, At this temperature the standard density meter is recommended to select 27 ℃. 3.3.2 The use of the relative density of the mark, by definition 3.2, the relative density of the standard reference temperature T1 and T2 should all 15.56 ℃ (60 ° F). 3.4 3.4.1 The surface tension calibration density meter, unless the requirements of high-precision, surface tension or should use a standard classification given in Appendix A Select the density meter is used. GB/T 17764-2008/ISO 387. 1977 ......

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